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Kosmos-1408
A telescope image showing stars as streaks and Kosmos 1408 debris as circled dots
Ground-based telescope image of Kosmos 1408 debris (circled objects), captured on 15 November 2021
NamesКосмос-1408
Ikar No. 39L
Mission typeELINT
COSPAR ID1982-092A Edit this at Wikidata
SATCAT no.13552
Mission duration6 months (planned)[1]
2 years (achieved)[2]
Spacecraft properties
SpacecraftIkar No. 39L [3]
Spacecraft typeELINT
BusTselina-D
ManufacturerYuzhnoye Design Office
Launch mass1,750 kg (3,860 lb)
Start of mission
Launch date16 September 1982, 04:55 UTC
RocketTsyklon-3
Launch sitePlesetsk Cosmodrome, Site 32/2
ContractorYuzhmash
End of mission
Declared1984
Destroyed15 November 2021
Orbital parameters
Reference systemGeocentric orbit[2]
RegimeLow Earth orbit
Perigee altitude465 km (289 mi)
Apogee altitude490 km (300 mi)
Inclination82.60°
Period93.00 minutes
Kosmos Series

Kosmos-1408 (Russian: Космос-1408) was an electronic signals intelligence (ELINT) satellite operated by the Soviet Union. It was launched into low Earth orbit on 16 September 1982 at 14:55 UTC, replacing Kosmos-1378. It operated for around two years before becoming inactive and left in orbit.

The satellite was destroyed in a Russian anti-satellite weapon test on 15 November 2021, resulting in space debris in orbits between 300 and 1,100 km (190 and 680 mi) above Earth. The threat of potential collision with debris caused the crew of the International Space Station (ISS) to take shelter in their escape capsules for the first few passes of the debris cloud, and permanently increased the future risk of a debris collision with the ISS or other satellites.

Mission

[edit]

From 1965 to 1967, the Soviet Yuzhnoye Design Office developed two satellite ELINT systems: Tselina-O for broad observations and Tselina-D for detailed observations. The ELINT payloads (satellites) for Tselina were first tested under the Kosmos designation in 1962–65. The Soviet Ministry of Defence could not convince the different parts of the Soviet military to decide between the two, so both systems were brought into service. The first production Tselina-O was launched in 1970. The Tselina-D took longer to enter service, due to delays with the satellite development and problems with the mass budget. The full Tselina system became operational in 1976. Continued improvements in the satellite systems led to Tselina-O being abandoned in 1984, with all of the capabilities of the two satellite systems being combined into Tselina-D.[4]

Spacecraft

[edit]
plot showing the decrease in orbit of Kosmos 1408 compared to the ISS orbit
The orbital decay of Kosmos-1408 since 1980, compared with the ISS

Kosmos-1408 was part of the Tselina-D system.[5][6] It had a mass of around 1,750 kg (3,860 lb),[7][8] and a radius of around 2.5 m (8 ft 2 in).[9] It is thought to have replaced Kosmos-1378 in the Tselina system, since it was launched into a similar orbital plane.[4][10]

Kosmos-1408 was launched on a Tsyklon-3 launch vehicle on 16 September 1982,[1] from Site 32/2,[11] at the Plesetsk Cosmodrome.[4] It was placed in low Earth orbit, with a perigee of 645 km (401 mi), an apogee of 679 km (422 mi), and an inclination of 82.5°. Its orbital period was 97.8 minutes.[12]

The satellite had an expected lifespan of around six months,[1] but it operated for around two years.[2] The satellite could not be de-orbited after finishing operations because it did not have a propulsion system. Its orbit subsequently slowly decayed due to the small natural drag of the thermosphere.[2][3]

Destruction

[edit]
plot of declination against right ascension showing the crossing points between ISS and Kosmos 1408 orbits
Warning periods when the ISS and Kosmos-1408 orbits crossed

On 15 November 2021, at around 02:50 UTC, the satellite was destroyed as part of an anti-satellite weapons test by Russia.[2] The direct-ascent anti-satellite[13] A-235 "Nudol" anti-ballistic missile[11] was launched from Plesetsk Cosmodrome[14] at around 02:45 UTC.[2] The system had been undergoing testing since 2014, but this was the first satellite it destroyed.[11] The Outer Space Treaty, which Russia has ratified, bans some types of military activities in space, but not anti-satellite missiles using conventional warheads.[15]

The destruction of the satellite and missile produced a cloud of space debris that threatened the International Space Station.[16][5] The seven crew members aboard the ISS (four American, two Russian, one German)[16] were told to put on their spacesuits[13] and take shelter in the crew capsules[17] so they could quickly return to Earth if debris struck the station.[14] The satellite had been in orbit at an altitude ~50 kilometers (~30 miles) above the ISS orbital altitude,[6] with the debris intersecting the orbit of the ISS every 93 minutes.[18]

The crew sheltered for only the second and third passes through the debris field, based on an assessment of the debris risk.[19] There is no evidence that any debris hit the station,[2] but the risk of a potential impact was thought to be increased by a factor of five for the following weeks and months,[20] and the longer term risk was doubled.[21] In June 2022 the ISS had to manoeuvre to avoid a piece of debris from the satellite.[22] The debris can also pose a risk to other low Earth orbit satellites,[14][9] and several SpaceX Starlink satellites underwent manoeuvres to reduce the risk of collision with the debris.[23] On 18 January 2022 there was a near miss (separated by only 14.5 metres (48 ft)) between a piece of debris and the Tsinghua Science Satellite.[24]

On 15 November, the US State Department reported that it had identified about 1,500 pieces of debris that can be tracked by ground-based radar,[18][25] and hundreds of thousands more that are more difficult to track.[14] The same day, breakup of the satellite was independently confirmed by Numerica Corporation and Slingshot Aerospace.[26][20] By 16 November 2021, the debris was orbiting at altitudes between 440 and 520 km (270 and 320 mi);[14] by 17 November 2021 this range increased to 300 to 1,100 km (190 to 680 mi).[27]

On 18 November 2021, LeoLabs, a commercial tracking company, detected around 300 pieces and also estimated that there were around 1,500 ground-trackable pieces in total. They found this lower than expected, compared to other anti-satellite tests, meaning that the pieces are expected to have higher masses so will stay in orbit for longer,[9] and that the lower-than-expected number of debris pieces might be because the event was not a hypervelocity collision.[28] By 21 December, LeoLabs was tracking around 500 pieces of debris, including several large items that are thought to be the solar panels, antennas and booms from the satellite.[8]

The low altitude of the satellite means the debris swarm is expected to be short-lived. As of February 2023 only 300 of the initial 1,790 pieces of debris (17%) were still in orbit.[29] Increasing solar activity during solar cycle 25 is causing the debris to decay at a faster rate than usual.[30]

Reactions

[edit]

The US State Department accused Russia of having targeted Kosmos 1408 during an anti-satellite weapon test, using a ground-based missile against their own defunct satellite,[18] saying that it was "dangerous and irresponsible".[16] On 15 November the Russian foreign minister, Sergei Lavrov, stated that there was no risk to the ISS or other peaceful uses of space.[31] On 16 November, Sergei Shoigu, the Russian minister of defence, acknowledged that the destruction of the satellite was due to a Russian missile test, but argued that it posed no threat to any space activities.[16]

NASA administrator Bill Nelson stated that: "With its long and storied history in human spaceflight, it is unthinkable that Russia would endanger not only the American and international partner astronauts on the ISS, but also their own cosmonauts." He added, "Their actions are reckless and dangerous, threatening as well [sic] the Chinese space station and the taikonauts on board."[32][13]

The Secure World Foundation, a U.S. think tank, called upon the United States, Russia, China, and India to declare unilateral moratoriums on further testing of their anti-satellite weapons.[33]

See also

[edit]
Wikimedia Commons has media related to Kosmos 1408.

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Kosmos 1408

View on Grokipedia
from Grokipedia
Kosmos 1408 was a Soviet satellite of the Tselina-D class, launched on 16 September 1982 from the aboard a rocket into a of approximately 485 kilometers altitude for electronic intelligence (ELINT) collection by monitoring radio emissions from naval vessels and other targets. The approximately 2,000-kilogram operated for about two years before becoming defunct and remaining inert in for nearly four decades. On 15 November 2021, conducted a direct-ascent anti-satellite (ASAT) test from Plesetsk, deliberately striking and fragmenting Kosmos 1408 into at least 1,500 trackable debris pieces and thousands of smaller fragments dispersed across altitudes from 300 to 1,100 kilometers, creating a persistent collision hazard for operational satellites including the , which performed multiple evasive maneuvers in response. The event drew international condemnation for exacerbating the orbital debris environment and demonstrating the weaponization of space, though Russian officials asserted no significant long-term threat to other .

Historical Context and Launch

Soviet ELINT Program Background

The Soviet Union's electronic intelligence (ELINT) satellite efforts originated in the early , amid escalating tensions, as a means to systematically intercept and analyze non-communications electronic signals, particularly emissions from adversary air defense, naval, and ground-based systems. Initial ELINT payloads were incorporated into broader satellites, including photoreconnaissance platforms, to map electronic orders of battle and identify signal characteristics for threat assessment and targeting data. These early integrations demonstrated the feasibility of space-based ELINT, prompting dedicated development to achieve persistent global coverage independent of other mission types. By 1962–1965, the USSR conducted operational tests of specialized ELINT hardware under the Kosmos designation, launching satellites focused on signal interception and geolocation. This phase validated key technologies for relay and onboard processing, transitioning from experimental to programmatic scale. The culmination was the formal Tselina program, approved in the mid-, which established a two-tier : Tselina-O satellites for wide-area and preliminary signal cataloging, and Tselina-D for targeted, high-resolution follow-up on detected emitters. Development of Tselina-O traced back to the early 1960s under Soviet defense research institutes, with first flights operationalizing the system around 1967. Tselina-O platforms, weighing approximately 1,000–1,500 kg and launched via or similar vehicles into low Earth orbits around 800–1,000 km altitude, scanned broad frequency bands to detect and classify types, supporting electronic warfare planning and updates. Complementing these, heavier Tselina-D satellites (up to 3,000 kg, often deployed via rockets) provided detailed parametric analysis, including signal modulation, power levels, and precise emitter locations, frequently operating in coordinated constellations of six vehicles phased 60 degrees apart for overlapping coverage. The program's emphasis on store-and-dump data transmission via ground stations enabled accumulation of vast signal libraries, critical for countering deployments and verifying compliance. From 1967 onward, the USSR orbited roughly 200 dedicated ELINT satellites across Tselina generations, sustaining high launch cadences—often multiple per year—to maintain orbital redundancy against failures and counter emerging threats. Successive iterations, such as Tselina-2 introduced in the late and , expanded frequency coverage into higher bands and incorporated improved antennas for shipborne and airborne target tracking, reflecting iterative enhancements driven by evolving adversary technologies. This infrastructure not only bolstered Soviet but also informed electronic countermeasures development, with mission durations typically spanning 1–3 years before atmospheric decay or controlled deorbit.

Launch Sequence and Initial Orbit

Kosmos 1408, a Tselina-D class electronic intelligence satellite, was launched on September 16, 1982, at 04:55 UTC from launch pad 32/2 at the in the . The mission utilized a , a three-stage liquid-fueled launch vehicle adapted from the R-36 intercontinental ballistic missile, which ignited its first stage to achieve initial ascent before sequential stage separations propelled the payload toward orbital insertion. The launch successfully placed the approximately 1,750 kg into a characterized by a perigee altitude of 636 km, an apogee of 666 km, and an of 82.6 degrees relative to the . This near-polar, near-circular trajectory provided the satellite with repeated passes over northern hemispheric regions, aligning with its design for collection. No anomalies were reported during the ascent or early orbital phase, enabling prompt activation of onboard systems.

Mission Profile

Operational Objectives

Kosmos 1408, a Tselina-D spacecraft launched on September 16, 1982, was designed to conduct electronic (ELINT) operations by intercepting and analyzing radio emissions from ground-based and naval sources. Its core function involved detecting pulsed signals and other electronic emitters to support Soviet military assessments of adversary capabilities. The satellite's objectives centered on providing detailed geolocation and classification of radio sources, achieving positional accuracy for emitters estimated at 1-2 kilometers. This complemented the Tselina-O series' general surveillance role, enabling paired operations for comprehensive coverage through constellations of up to six Tselina-D units spaced approximately 60 degrees apart in orbit. Operational priorities included real-time monitoring of foreign systems, with a focus on electronic rather than communications , to identify emitter types, operational parameters, and potential threats such as or naval tracking networks. The mission emphasized persistent low-Earth orbit passes over key regions to gather actionable data on electronic .

In-Orbit and Data Collection

Kosmos 1408, designated 1982-092A, was inserted into an initial of approximately 250–300 km altitude following its launch on September 16, 1982, from aboard a rocket. As a Tselina-D class electronic intelligence (ELINT) , its primary function involved the interception and analysis of radio, , and telemetry signals to detect, geolocate, and characterize military emitters. The payload, developed by TsNII-108, enabled real-time signal processing to determine emitter types, operational modes, and performance parameters, supporting Soviet strategic of foreign networks. During its active operational phase, estimated at around six months based on Tselina-D design parameters, the satellite contributed to a networked constellation where multiple units, often spaced 60 degrees apart in orbital planes, provided overlapping coverage for persistent monitoring of global activity. relied on onboard antennas and receivers to capture signals, with processed downlinked via S-band or similar frequencies to ground stations for further analysis by units. While specific yield metrics—such as the number of signals intercepted or geolocations achieved—remain classified due to the program's military nature, the satellite's extended orbital presence until system failure indicates initial in-orbit stability and propulsion maneuvering capability for station-keeping. Performance was augmented by complementary Tselina-O satellites for broader survey tasks, allowing Tselina-D units like Kosmos 1408 to focus on detailed classification of high-priority targets, such as naval or air defense radars. The mission emphasized passive collection to avoid detection, with orbital inclinations near 82 degrees facilitating high-latitude passes over key regions including and . Post-mission, the spacecraft transitioned to a dormant state, with no reported anomalies during active data gathering that would suggest degraded sensor efficacy.

Spacecraft Design

Core Components and Sensors

Kosmos 1408 utilized the Tselina-D satellite platform, developed by the Yuzhnoye Design Bureau in , as the primary bus for housing its electronic intelligence (ELINT) payload, which was provided by TsNII-108 GKRE. The spacecraft's total mass was approximately 1,750 kg, with the payload module weighing 630 kg and focused on gathering. Early Tselina-D designs, including those from the 1982 era of Kosmos 1408's launch, lacked dedicated attitude control thrusters, relying instead on a deployable boom for and solar panels with one-axis orientation for power alignment. The core sensors comprised radio-frequency receivers and intercept hardware, exemplified by systems like Korvet, configured to capture and process signals, telemetry data, and communications from terrestrial, naval, and aerial emitters. These instruments enabled detailed of signal parameters, including emitter , frequency characteristics, and modulation patterns, complementing broader surveillance from paired Tselina-O satellites by providing targeted, high-resolution ELINT data. Onboard processing recorded intercepted signals for later downlink to ground stations during passes over Soviet territory, with auxiliary continuous-wave beacons operating at 153 MHz to facilitate orbital tracking and status monitoring by ground controllers. Structurally, the incorporated a pressurized instrument compartment to protect sensitive , deployable antennas for signal reception across multiple bands, and a optimized for low-Earth orbit operations at altitudes of 600-700 km. This configuration supported a nominal mission lifespan of six months, during which the sensors prioritized real-time detection and characterization of electronic emissions to inform Soviet military assessments of adversary capabilities.

Power and Propulsion Systems

The Tselina-D series satellites, to which Kosmos 1408 belonged, utilized solar arrays as their primary power source, consisting of two deployable panels with one-axis orientation capability. These arrays generated approximately 350 watts at launch, degrading to 315 watts by the end of the nominal six-month operational lifespan, with onboard batteries providing supplementary power for eclipse periods or peak loads. Propulsion details for Tselina-D spacecraft remain sparsely documented in open sources, reflecting the classified nature of Soviet programs. The bus incorporated a three-axis attitude control system for precise orientation, achieving roll accuracy of ±5 degrees and yaw/pitch accuracy of ±10 degrees, supported by a deployable boom to aid passive alignment. Active control likely relied on small chemical thrusters, consistent with era-standard Soviet designs for ELINT platforms requiring station-keeping in (typically 600–700 km altitude at 82.5° inclination), though no specific propellant type (e.g., monopropellant) or delta-V capacity is publicly verified for the 11F619 variant. The overall mass was approximately 1,750 kg, including a 630 kg section, enabling limited maneuvers during the initial post-launch phase but not extensive orbital adjustments beyond insertion via the Vostok-2M or launch vehicle.

Extended Orbital History

Post-Operational Phase

Following the cessation of active electronic intelligence operations, estimated to have occurred within one to two years of its September 16, 1982 launch—consistent with the Tselina-D series' design life of approximately six months—Kosmos 1408 entered a passive orbital state. The 1,750 kg , lacking post-mission deorbit capabilities typical of Soviet-era designs, remained intact and uncontrolled in , subject solely to natural perturbations including J2 oblateness effects and residual atmospheric drag at its initial altitude. No propulsion firings or attitude adjustments were performed after deactivation, as evidenced by the absence of changes or significant eccentricity variations in tracked elements prior to 2021. In this post-operational configuration, the maintained a stable but slowly evolving , with its initial parameters of 666 km apogee, 636 km perigee, and 82.6° inclination experiencing minimal short-term deviations due to the relatively high altitude mitigating drag-induced decay. Tracking data from U.S. Space Surveillance Network observations confirmed no anomalous events or collisions during this extended inactive period, underscoring the spacecraft's role as dormant hardware rather than an operational asset. This phase exemplified the era's norm of leaving defunct satellites , contributing to the accumulation of uncontrolled objects in populated orbital regimes without mitigation strategies. Kosmos 1408, launched on September 16, 1982, entered an initial characterized by a perigee altitude of 636 km, an apogee of 666 km, and an inclination of 82.6 degrees. This placed the satellite in the upper reaches of the regime, where atmospheric density is low but sufficient to induce long-term drag effects on non-maneuvering objects. Following the end of its operational phase, the satellite underwent passive driven by residual atmospheric drag, with no evidence of active for maintenance in its later years. Over the nearly 39 years from launch to the 2021 anti-satellite test, the contracted gradually, reflecting the cumulative impact of drag in the thermosphere and layers. Perigee altitude decreased by approximately 171 km, while apogee fell by about 176 km, resulting in an average annual decay rate of roughly 4.4 km for both parameters. By early November 2021, immediately prior to the test, Kosmos 1408 occupied a decayed orbit with a perigee of 465 km and apogee of 490 km, positioning it at heightened risk of further rapid descent due to denser atmospheric interactions at lower altitudes. This trend aligned with expected behavior for derelict satellites in similar inclinations and without drag mitigation, as documented in orbital propagation models. No anomalous perturbations, such as collisions or deliberate maneuvers, were reported in the pre-2021 period to accelerate this decay.

2021 Anti-Satellite Test

Test Preparation and Execution

Russia selected , a defunct Tselina-D electronic intelligence launched on September 3, 1982, as the target for the test due to its predictable at approximately 460–500 km altitude, which allowed for demonstration without involving active foreign assets. The had ceased operations decades earlier, making it suitable for a destructive kinetic intercept to validate the PL-19 Nudol direct-ascent anti-satellite (DA-ASAT) system's hit-to-kill capability against maneuvering or non-maneuvering targets in low orbit. Prior non-destructive tests of the Nudol system, originating from the since 2014, had confirmed basic launch and ascent profiles, enabling refined targeting algorithms for this engagement. Execution occurred on November 15, 2021, with the kinetic kill vehicle launched from Plesetsk Cosmodrome (62.9°N, 40.1°E) at approximately 02:45 UTC, ascending rapidly to rendezvous with Kosmos 1408. The intercept succeeded at 02:47:31.5 UTC, fragmenting the satellite into over 1,500 trackable debris pieces at around 500 km altitude through direct hypervelocity collision, confirming the system's precision in a real-space environment. Russian officials described the test as a successful demonstration of a new missile defense technology, emphasizing no risk to manned spacecraft despite subsequent close approaches to the International Space Station. The unannounced nature of the operation, however, led to immediate international tracking challenges, as U.S. Space Command detected the event via ground-based radars monitoring orbital anomalies.

Collision Dynamics and Fragmentation

On November 15, 2021, a Russian direct-ascent anti-satellite missile intercepted Kosmos 1408, a defunct Soviet-era satellite in low Earth orbit, resulting in its complete destruction. The satellite, with a mass of approximately 2,200 kg, occupied a pre-impact orbit of 490 km apogee by 465 km perigee at an inclination of 82.6 degrees. The kinetic kill vehicle from the ground-launched missile collided with the target at hypervelocity, typical for such intercepts estimated at several kilometers per second relative speed, converting substantial kinetic energy into structural failure and fragmentation. The collision dynamics followed patterns observed in impacts, where the interceptor's overwhelmed the satellite's integrity, leading to a near-instantaneous catastrophic rather than partial damage. observations immediately post-event revealed an expanding debris cloud with fragments exhibiting delta-velocities that dispersed them across a wide distribution, modeled using standard simulations like NASA's Standard Breakup Model. This model, validated against radar cross-section data from facilities such as Haystack Ultrawideband Satellite Imaging and Goldstone, predicted area-to-mass ratios and ejection velocities consistent with the observed isotropic expansion of the fragment field. Fragmentation produced over 1,500 trackable objects larger than 10 cm, with 1,604 cataloged by early , alongside hundreds of thousands of smaller untrackable pieces. Initial analyses indicated roughly three fragments per of parent mass, with larger intact components retaining near-parent orbits while smaller achieved apogees up to 1,440 km and perigee variations extending reentry timelines from months to decades. Beam-park experiments five months later confirmed the remained relatively compact, highlighting sustained collision hazards due to correlated fragment trajectories. Approximately 60% of fragments displayed inclinations higher than the original 82.6 degrees, reflecting asymmetric ejection from the impact geometry.

Debris Generation and Immediate Aftermath

Debris Characteristics

The destruction of Kosmos 1408 on November 15, 2021, generated over 1,500 trackable fragments larger than approximately 10 cm, as cataloged by the U.S. Space Surveillance Network (SSN), with estimates indicating hundreds of thousands of smaller untrackable pieces down to millimeter sizes. These fragments resulted from a high-velocity kinetic impact, producing a characterized by rapid expansion and high relative velocities, with some pieces exhibiting angular velocities up to 90 degrees per second. Debris orbits primarily clustered around the satellite's pre-impact parameters: an altitude of about 480 km, with perigee and apogee variations leading to a spread between roughly 300 km and 1,100 km, and an inclination near 82 degrees. Approximately 60% of cataloged fragments maintained orbital periods indicative of stability below 600 km, contributing to immediate collision risks for operational assets like the . Size distribution followed a typical fragmentation model, with larger intact components (up to several decimeters) alongside numerous high area-to-mass ratio shards prone to atmospheric drag effects. Material composition, inferred from the satellite's electronic intelligence design, included lightweight metals such as aluminum alloys and potential composites from sensors and structures, enhancing fragmentation into irregular shapes. observations confirmed a dispersion creating a of , with relative speeds sufficient to intersect multiple orbital planes within hours of the event.

Short-Term Tracking Efforts

Following the destruction of Kosmos 1408 on November 15, 2021, the U.S. Space Surveillance Network (SSN), operated by the U.S. Space Force, rapidly initiated tracking of the resulting debris field. By the day of the test, the SSN had detected over 1,500 trackable fragments larger than 10 cm in , with projections of hundreds of thousands of smaller, untrackable pieces posing collision risks. These efforts utilized ground-based radars and optical sensors to catalog orbital elements, enabling conjunction assessments for assets like the (ISS), which faced multiple close approaches with large fragments in the ensuing weeks. To characterize smaller debris components, specialized radar campaigns employed the Haystack Ultra-wideband Satellite Imaging Radar (HUSIR) and radar, detecting fragments as small as 3-5.5 mm at altitudes around 1,000 km. The SSN disseminated initial catalog data via the Space-Track.org portal, allowing international partners to access two-line element sets for independent propagation and risk analysis. Internationally, the (ESA) contributed through its Tracking and Imaging Radar (TAR) at the site, conducting early observations of the cloud to assess and distribution. Optical telescopes worldwide, including those from private entities like Numerica, captured images of the expanding field within days, highlighting streaked stars against clustered fragments for visual verification of tracking data. These combined short-term efforts established a baseline for monitoring the high-velocity , which propagated rapidly due to the satellite's 480 km , informing immediate maneuvers for crewed .

Long-Term Debris Evolution

Orbital Propagation Analysis

Following the November 15, 2021, anti-satellite test that fragmented at an initial orbit of approximately 490 km × 465 km altitude and 82.6° inclination, orbital employed numerical models to simulate the long-term of the resulting cloud. The Standard Satellite Breakup Model (SSBM) generated an initial distribution of over 1,500 fragments, validated against radar data from facilities such as MIT Lincoln Laboratory's Haystack Ultrawideband Satellite Imaging Radar (HUSIR) and , which confirmed fragment velocities leading to apogees extending up to 1,440 km. incorporated perturbations including atmospheric drag (dominant in ), Earth's oblateness (J2 effect), solar radiation pressure, and lunisolar gravity, using tools like the Orbital Debris Engineering Model (ORDEM 3.2) for ensemble predictions. Debris orbits rapidly circularized and decayed due to differential drag, with lower-perigee fragments experiencing accelerated atmospheric reentry while higher-velocity dispersed into semi-major axes spanning 200–1,400 km altitudes. Approximately 60% of fragments exhibited slightly higher inclinations than the parent satellite, contributing to gradual latitudinal spreading over months to years via differentials. In the first seven months post-event, the cloud's expansion formed transient density waves from velocity dispersion, doubling the debris flux encountered by the (ISS) at ~400 km and increasing it by 75% for China's Tiangong station, though fluxes declined as drag preferentially removed smaller, higher area-to-mass ratio pieces below 600 km. Long-term forecasts indicate over 90% of the cataloged fragments (initially ~1,600 objects ≥10 cm) will reenter within five years, driven by the event's relatively low altitude, though ~100–1,260 tracked pieces persisted as of fall 2023, primarily in higher orbits with projected lifetimes of decades for larger, lower-drag debris. LeoLabs estimates 1,250–2,500 trackable fragments overall, with propagation models highlighting sustained spatial density increases in low Earth orbit, as higher-apogee debris decays more slowly under reduced drag. These analyses underscore the role of initial kinetic energy distribution in prolonging cloud coherence beyond immediate fragmentation, informing mitigation strategies for persistent orbital hazards.

Collision Risk Assessments

The destruction of Kosmos 1408 on November 15, 2021, generated over 1,500 trackable debris fragments larger than 10 cm, along with hundreds of thousands of smaller pieces, significantly elevating collision probabilities in low Earth orbit (LEO). Initial assessments by U.S. Space Command indicated that the debris field, originating at approximately 480 km altitude, posed immediate threats to operational spacecraft, including the International Space Station (ISS), prompting emergency maneuvers and crew sheltering protocols. NASA's Orbital Debris Program reported that the fragment cloud's dispersion led to a quasi-stable collision risk to the ISS approximately twice the pre-test level by early 2022, with millimeter-sized debris impact risks to robotic missions increasing by about 5% in the first month post-event. Short-term analyses focused on altitudes below 600 km highlighted disproportionate effects on inhabited platforms and constellations. Debris flux to the ISS nearly doubled in the first six months, while the experienced a 75% increase; for the constellation at around 550 km, average flux rose by 20%, with counter-rotating orbital planes facing higher exposures that persisted above 25% of values after seven months due to differential decay rates. Peer-reviewed modeling confirmed these elevations, attributing them to the cloud's and dynamics, which necessitated over 1,700 avoidance maneuvers for satellites between December 2021 and May 2022 out of 6,873 total conjunction responses. Long-term evaluations project sustained but decaying risks, with over 90% of fragments expected to reenter within five years, though surviving populations could elevate LEO collision probabilities for decades. Technical assessments noted a 33% increase in conjunction events for the ISS by mid- and up to a doubling of risks under specific orbital conditions, alongside a 20% reduction in overall flight safety margins at affected altitudes. The European Space Agency's monitoring incorporates Kosmos 1408 debris into broader LEO risk indices, documenting ongoing high-probability (>10^{-6}) conjunctions at inclinations like 97.4° and altitudes near 500 km, contributing to projections of exponentially rising collision cascades if unmitigated. These findings underscore the test's role in amplifying the pre-existing debris environment, with empirical tracking revealing faster-than-predicted reentries for many pieces—1,089 by August —yet persistent threats to active satellites from residual fragments.

International Reactions

Condemnations and Diplomatic Responses

The United States issued a strong condemnation immediately following the November 15, 2021, test, with the State Department describing it as a "dangerous and irresponsible" counterspace weapons test that endangered astronauts aboard the International Space Station (ISS) and jeopardized the long-term sustainability of outer space. NASA Administrator Bill Nelson echoed this, stating that the debris generation necessitated emergency safety procedures for ISS crew members and criticizing the test as reckless amid ongoing human spaceflight activities. U.S. Space Command further highlighted the enduring threat from the resulting orbital debris field, which included over 1,500 trackable pieces and potentially tens of thousands of smaller fragments. The responded on November 19, 2021, with High Representative condemning the kinetic direct-ascent anti-satellite (ASAT) test as a demonstration of destructive capability that threatened satellites critical for security, economic activity, and scientific research, while underscoring the heightened collision risks in . The United Kingdom's Space Agency analyzed the debris fragmentation of Kosmos 1408 and expressed concerns over the test's implications for space safety, aligning with broader calls for restraint in ASAT activities. Germany's voiced deep concern, emphasizing the destruction of Russia's own satellite as an escalation that undermined global space security norms. NATO's issued a statement on November 19, 2021, strongly condemning the test as reckless and irresponsible, noting its contribution to space debris proliferation and potential harm to allied space assets. These responses contributed to a multilateral push, with the U.S. leading efforts in December 2021 to garner support from over 30 nations for a voluntary moratorium on destructive ASAT tests that generate long-lived orbital , though opposed such initiatives. This diplomatic momentum later influenced discussions, culminating in a 2022 resolution endorsing non-destructive ASAT testing norms, reflecting widespread international frustration with debris-creating demonstrations.

Russian Official Statements and Defenses

On November 16, 2021, the Russian Ministry of Defense confirmed the destruction of Kosmos-1408, stating that a direct-ascent had been launched from the at 06:12 on November 15, successfully striking the target satellite in to verify "prospects of creating promising protection systems from external threats." The ministry asserted that the test complied with all safety protocols and that the resulting fragments, confined to orbits below 460 km altitude, posed no risk to other space objects, including the (ISS), as they would naturally deorbit due to atmospheric drag. Kremlin spokesman responded to international criticism by emphasizing that had "always observed and continues to observe all security measures in space," denying any endangerment to foreign assets and attributing ISS crew sheltering maneuvers to precautionary measures rather than imminent threats. Peskov further claimed the test was a routine verification of defensive capabilities essential for in an increasingly contested orbital domain. Roscosmos Director General defended the action as a necessary demonstration of anti-missile technologies, arguing that the satellite's low orbit ensured debris dissipation within months and accusing the of hypocrisy for conducting analogous destructive tests, such as the 2008 interception of using an SM-3 missile. Rogozin highlighted Russia's prior proposals for verifiable bans on space weapons, suggesting Western rejection of such treaties undermined global space stability. The Russian Foreign Ministry reinforced these points, describing the test as a planned, sovereign exercise not prohibited by and countering U.S. condemnations by citing America's historical ASAT activities, including the 1985 F-15 launched test, as evidence of selective outrage. Officials maintained that no prior notification was required, as the operation targeted a defunct domestic asset and minimized collateral risks through precise targeting.

Controversies and Broader Implications

Debates on ASAT Testing Norms

The destruction of Kosmos 1408 by a Russian direct-ascent ASAT on November 15, 2021, which generated over 1,500 trackable debris fragments, many projected to remain in orbit for years, reignited global discussions on the need for binding norms against debris-producing ASAT tests. Proponents of restrictions argue that such tests exacerbate the risk—cascading collisions rendering unusable—and undermine space sustainability, as evidenced by the forced maneuvers of the to avoid debris from the event. Critics of unrestricted testing, including U.S. officials, contend that the Outer Space Treaty's Article IX obligates states to conduct activities with "due regard" to others' interests and avoid harmful contamination, interpreting destructive tests as potentially violative when they create enduring hazards without justification. In response, the announced a unilateral moratorium on destructive direct-ascent ASAT tests in April 2022, pledging not to perform tests that produce long-lived and urging reciprocal commitments from other spacefaring nations to foster a norm of responsible behavior. This initiative gained traction, with over 30 countries endorsing similar pledges by 2023, and the adopting a in December 2022 calling for states to refrain from destructive DA-ASAT testing. Advocates, such as the (SIPRI), emphasize that unilateral moratoria are insufficient without multilateral verification mechanisms, proposing a banning kinetic intercepts that generate to address the asymmetries where major powers like continue testing under the guise of "space defense verification." Russia rejected these proposals, asserting that the Kosmos 1408 test was a lawful demonstration of counterspace capabilities essential for against potential threats like U.S. missile defense systems, and dismissing moratorium calls as politically motivated attempts to constrain Russian sovereignty. Russian officials maintained that the was confined to lower orbits and would deorbit rapidly due to atmospheric drag, a claim contradicted by tracking data showing persistent fragments at altitudes up to 1,100 km endangering operational satellites. accused proponents of , citing historical U.S. actions such as the 2008 SM-3 intercept of , which produced , and argued that any ban should encompass all kinetic tests without exceptions favoring advanced economies. This stance aligns with 's advocacy for the Prevention of an Arms Race in Outer Space () treaty, which seeks broader prohibitions on space weapons but has stalled due to U.S. concerns over unverifiable restrictions on non-destructive capabilities. Debates also highlight challenges in defining "destructive" tests, with some experts distinguishing between direct-ascent hits and co-orbital or ground-based alternatives that minimize , while others warn that partial bans could incentivize covert or non-kinetic ASAT development without addressing root threats to access. , following its ASAT test claimed to produce minimal , joined the U.S.-led moratorium in 2022, bolstering the norm's momentum, whereas has conducted tests but expressed conditional support pending equitable terms. Despite progress, skeptics note that without enforcement—such as on-orbit inspections or sanctions—norms remain aspirational, as demonstrated by Russia's continued ASAT-related activities post-.

Comparisons to Other Nations' Tests

The 2021 Russian direct-ascent anti-satellite (ASAT) test against Kosmos 1408, conducted at an altitude of approximately 480 km, generated over 1,500 cataloged trackable objects larger than 10 cm, with estimates of hundreds of thousands of smaller fragments posing collision risks. This field increased the orbital object count in (LEO) by about 8% from cataloged fragments alone, with many pieces persisting due to the test's altitude, which exceeds rapid atmospheric reentry thresholds for smaller objects. In contrast, the 2007 Chinese ASAT test targeting the defunct Fengyun-1C at 865 km produced over 3,500 cataloged pieces, the largest such event to date, contributing significantly to long-lived populations that remain hazardous more than 15 years later, as higher altitudes delay decay. The ' 1985 ASAT test, involving an air-launched ASM-135 missile against the satellite at around 555 km, resulted in approximately 285 cataloged objects, a comparatively modest output that cleared from within a decade due to partial atmospheric drag effects at that altitude. Unlike Kosmos 1408, where the target satellite's (about 2,000 kg) amplified fragmentation, 's smaller limited the debris yield, though both tests demonstrated kinetic intercept capabilities without prior international mitigation norms. India's 2019 test, destroying the Microsat-R satellite at 300 km, cataloged fewer than 400 trackable pieces, intentionally conducted at a lower altitude to ensure most reentered within months, minimizing long-term environmental impact compared to the Kosmos event's more persistent cloud.
Test EventDateTarget Altitude (km)Cataloged Debris (>10 cm)Notes on Persistence
US SolwindSep 1985~555~285Most decayed in <10 years; early test pre-debris guidelines.
China Fengyun-1CJan 2007865>3,500Highest yield; debris lingers >15 years due to altitude.
Microsat-RMar 2019~300<400Rapid decay designed; short-term hazard only.
Russia Kosmos 1408Nov 2021~480>1,500Second-largest post-2007; ongoing risks to LEO assets.
These comparisons highlight varying emphases on debris : lower-altitude tests like India's prioritize quick dispersal, while mid- to high-altitude intercepts, as in the Kosmos 1408 and Fengyun-1C cases, exacerbate cumulative LEO congestion, with empirical models showing the Russian test's fragments elevating collision probabilities for crewed vehicles like the ISS by up to double in affected bands. The U.S. test, though debris-producing, preceded formalized assessments of space sustainability, whereas later events faced scrutiny under emerging norms against destructive ASAT demonstrations, though no binding prohibits them.

Impacts on Space Sustainability

The November 15, 2021, destruction of Kosmos 1408 generated over 1,500 trackable fragments larger than 10 cm, plus hundreds of thousands of smaller pieces below typical detection limits, substantially augmenting the population in at altitudes around 450 km. This influx represented a notable fraction of recent cataloged growth, complicating efforts and elevating baseline collision probabilities for operational satellites. Long-term orbital propagation models indicate that while atmospheric drag will eventually decay much of the debris cloud due to its relatively low altitude, fragments with higher velocities or inclinations may persist for years, dispersing into other orbital regimes and contributing to cross-track collision hazards. Radar observations through 2022 and beyond have tracked the cloud's evolution, revealing sustained fragmentation dynamics that mirror historical breakups but amplify cumulative environmental stress. The event necessitated repeated avoidance maneuvers by the , with over a dozen high-risk conjunctions assessed in the first year alone, underscoring operational burdens on crewed and uncrewed assets. By heightening the density of the debris environment, the test exacerbates risks associated with —a theoretical cascade of collisions generating further debris—particularly in crowded orbital shells used for and communication constellations. This addition strains global tracking networks, which must catalog and monitor an expanded inventory, diverting resources from predictive modeling to immediate threat assessment. Satellite operators face escalated costs for reserves and conjunction screening, potentially delaying deployments and inflating premiums, thereby hindering equitable access to for non-major powers. Overall, the incident illustrates how deliberate debris-generating actions undermine voluntary guidelines like those from the Inter-Agency Space Debris Coordination Committee, perpetuating a in orbit.

References

  1. https://isstracker.pl/en/satellites/13552
  2. http://www.milsatmagazine.com/cgi-bin/display_article.cgi?number=1651542653
  3. https://spacenews.com/russia-destroys-satellite-in-asat-test/
  4. https://www.twz.com/43140/russian-anti-satellite-test-produces-dangerous-debris-cloud-in-orbit-reports
  5. https://www.spacecom.mil/Newsroom/News/Article-Display/Article/2842957/russian-direct-ascent-anti-satellite-missile-test-creates-significant-long-last/
  6. https://ntrs.nasa.gov/citations/20220001918
  7. https://www.popsci.com/technology/russian-missile-destroys-russian-satellite/
  8. https://leolabs-space.medium.com/analysis-of-the-cosmos-1408-breakup-71b32de5641f
  9. https://www.thespacereview.com/article/4154/1
  10. http://www.milsatmagazine.com/story.php?number=1016495049
  11. https://space.skyrocket.de/doc_sdat/tselina-o.htm
  12. http://www.astronautix.com/t/tselina-o.html
  13. https://www.russianspaceweb.com/tselina.html
  14. http://www.astronautix.com/t/tselina-d.html
  15. https://www.globalsecurity.org/space/world/russia/sigint.htm
  16. https://space.skyrocket.de/doc_sdat/tselina-2.htm
  17. https://nextspaceflight.com/launches/details/1787
  18. https://www.wikidata.org/wiki/Q12907386
  19. https://www.nasaspaceflight.com/2021/11/russia-anti-satellite-missile-debris/
  20. http://www.astronautix.com/t/tsiklon-3.html
  21. https://orbitaldebris.jsc.nasa.gov/quarterly-news/pdfs/odqnv26i1.pdf
  22. https://ntrs.nasa.gov/api/citations/20220011989/downloads/Obs%2520Small%2520Deb%2520C1408%2520ASAT_AMOS_final_STRIVES.pdf?attachment=true
  23. https://www.sciencedirect.com/science/article/pii/S0094576523001078
  24. https://space.skyrocket.de/doc_sdat/tselina-d.htm
  25. https://www.globalsecurity.org/space/world/russia/tselinad.htm
  26. https://www.milsatmagazine.com/story.php?number=1651542653
  27. https://amostech.com/TechnicalPapers/2022/Space-Debris/Ramos.pdf
  28. https://amostech.com/TechnicalPapers/2022/Poster/Murray.pdf
  29. https://orbitaldebris.jsc.nasa.gov/library/hoosf_16e.pdf
  30. https://www.armscontrol.org/act/2021-12/news/russian-asat-test-creates-massive-debris
  31. https://gnosisnetwork.org/blog/norss-analysis-of-the-russian-anti-satellite-missile-test-event/
  32. https://www.iiss.org/online-analysis/online-analysis/2021/11/russia-conducts-direct-ascent-anti-satellite-test/
  33. https://spaceflightnow.com/2021/11/15/u-s-officials-space-station-at-risk-from-reckless-russian-anti-satellite-test/
  34. https://leolabs-space.medium.com/part-ii-new-observations-on-cosmos-1408-breakup-3d8e5441f720
  35. https://www.sciencedirect.com/science/article/pii/S2468896723001131
  36. https://www.sciencedirect.com/science/article/pii/S0094576522005586
  37. https://conference.sdo.esoc.esa.int/proceedings/neosst2/paper/38/NEOSST2-paper38.pdf
  38. https://orbitaldebris.jsc.nasa.gov/quarterly-news/pdfs/odqnv26i3.pdf
  39. https://ntrs.nasa.gov/citations/20220011989
  40. https://www.sciencedirect.com/science/article/abs/pii/S2468896724000089
  41. https://conference.sdo.esoc.esa.int/proceedings/neosst2/paper/38
  42. https://www.space.com/russia-anti-satellite-test-space-debris-images
  43. https://ui.adsabs.harvard.edu/abs/2025ChJSS..45.1038M/abstract
  44. https://outerspaceinstitute.ca/osisite/wp-content/uploads/Comment_Boley_ASAT_AUTHORCOPY_16JAN2024-1.pdf
  45. https://amostech.com/TechnicalPapers/2022/Poster/Oltrogge.pdf
  46. https://www.sdo.esoc.esa.int/environment_report/Space_Environment_Report_latest.pdf
  47. https://2021-2025.state.gov/russia-conducts-destructive-anti-satellite-missile-test/
  48. https://www.nasa.gov/news-release/nasa-administrator-statement-on-russian-asat-test/
  49. https://space.commerce.gov/u-s-response-to-russian-anti-satellite-test/
  50. https://www.consilium.europa.eu/en/press/press-releases/2021/11/19/statement-by-the-high-representative-of-the-union-for-foreign-affairs-and-security-policy-on-behalf-of-the-eu-on-the-russian-anti-satellite-test-on-15-november-2021/
  51. https://space.blog.gov.uk/2021/11/24/russia-asat-test-uk-space-agency-response-and-analysis-of-the-debris/
  52. https://www.auswaertiges-amt.de/en/newsroom/news/ffo-destructive-test-missile-russia-2496412
  53. https://www.nato.int/cps/en/natohq/news_188780.htm
  54. https://spacenews.com/united-nations-general-assembly-approves-asat-test-ban-resolution/
  55. https://www.reuters.com/world/us-military-reports-debris-generating-event-outer-space-2021-11-15/
  56. https://www.dw.com/en/russia-accuses-us-of-hypocrisy-over-satellite-destruction/a-59834986
  57. https://www.space.com/russia-defends-anti-satellite-test-amid-criticism
  58. https://www.cnbc.com/2021/11/16/russia-us-hypocritical-for-condemning-anti-satellite-asat-weapon-test.html
  59. https://lieber.westpoint.edu/russia-asat-test-development-space-law/
  60. https://www.sipri.org/commentary/essay/2021/russias-anti-satellite-test-should-lead-multilateral-ban
  61. https://bidenwhitehouse.archives.gov/briefing-room/statements-releases/2022/04/18/fact-sheet-vice-president-harris-advances-national-security-norms-in-space/
  62. https://www.armscontrol.org/act/2022-03/features/russias-anti-satellite-weapons-asymmetric-response-us-aerospace-superiority
  63. https://www.csis.org/analysis/space-age-anti-satellite-age
  64. https://lieber.westpoint.edu/russias-nuclear-anti-satellite-weapon-international-law/
  65. https://www.armscontrol.org/act/2007-03/chinese-satellite-destruction-stirs-debate
  66. https://blog.ucs.org/guest-commentary/what-the-us-can-do-following-russias-destruction-of-its-own-satellite/
  67. https://www.airandspaceforces.com/u-s-officials-russian-anti-satellite-test-created-extensive-new-orbital-debris-field/
  68. https://carnegieendowment.org/research/2019/04/indias-asat-test-an-incomplete-success?lang=en
  69. https://sma.nasa.gov/SignificantIncidents/assets/spacenewsrussianasat.pdf
  70. https://orbitaldebris.jsc.nasa.gov/quarterly-news/pdfs/ODQNv28i2.pdf
  71. https://ntrs.nasa.gov/api/citations/20250002783/downloads/ECSD2025_Radar_Obs_Manis_Presentation.pdf
  72. https://www.slingshot.space/news/one-year-after-russian-asat-test
  73. https://www.sdo.esoc.esa.int/publications/Space_Environment_Report_I7R1_20230912.pdf
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