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Camelopardalis
Constellation
Camelopardalis
List of stars in Camelopardalis
AbbreviationCam[1]
GenitiveCamelopardalis[1]
Pronunciation/kəˌmɛləˈpɑːrdəlɪs/, genitive the same
SymbolismGiraffe[1]
Right ascension03h 15m 36.2232s–14h 27m 07.8855s[2]
Declination86.0975418°–52.6655540°[2]
Area757 sq. deg. (18th)
Main stars2, 8
Bayer/Flamsteed
stars		36
Stars brighter than 3.00m0
Stars within 10.00 pc (32.62 ly)3
Brightest starβ Cam (4.03m)
Nearest starLHS 2459
Messier objects0
Meteor showersOctober Camelopardalids
Bordering
constellations		Draco
Ursa Minor
Cepheus
Cassiopeia
Perseus
Auriga
Lynx
Ursa Major
Visible at latitudes between +90° and −10°.
Best visible at 21:00 (9 p.m.) during the month of February.

Camelopardalis is a large but faint constellation of the northern sky representing a giraffe. The constellation was introduced in 1612 or 1613 by Petrus Plancius.[3][1] Some older astronomy books give Camelopardalus or Camelopardus as alternative forms of the name, but the version recognized by the International Astronomical Union matches the genitive form, seen suffixed to most of its brighter stars.[1]

Etymology

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First attested in English in 1785, the word camelopardalis comes from Latin,[4] and it is the romanization of the Greek "καμηλοπάρδαλις" meaning "giraffe",[5] from "κάμηλος" (kamēlos), "camel"[6] + "πάρδαλις" (pardalis), "spotted",[7] because it has a long neck like a camel and spots like a leopard.

Features

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The constellation Camelopardalis as it can be seen by the naked eye.

Stars

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See also: List of stars in Camelopardalis

Although Camelopardalis is the 18th largest constellation, it is not a particularly bright constellation, as the brightest stars are only of fourth magnitude. In fact, it only contains four stars brighter than magnitude 5.0.[8]

  • α Cam is a blue-hued supergiant star of magnitude 4.3, over 6,000 light-years from Earth. It is one of the most distant stars easily visible with the naked eye.[1]
  • β Cam is the brightest star in Camelopardalis with an apparent magnitude of 4.03. This star is a double star, with components of magnitudes 4.0[9] and 8.6. The primary is a yellow-hued supergiant 1000 light-years from Earth.[1]
  • 11 Cam is a star of magnitude 5.2, 650 light-years from Earth. It appears without intense magnification very close to magnitude 6.1 12 Cam, at about the same distance from us, but the two are not a true double star; they have considerable separation.[1]
  • Σ 1694 (Struve 1694, 32H Cam) is a binary star 300 light-years from Earth. Both components have a blue-white hue; the primary is of magnitude 5.4 and the secondary is of magnitude 5.9.[1]
  • CS Cam is the second brightest star, though it has neither a Bayer nor a Flamsteed designation. It is of magnitude 4.21 and is slightly variable.[9]
  • Z Cam (varying from amateur telescope visibility to extremely faint) is frequently observed as part of a program of AAVSO.[10] It is the prototype of Z Camelopardalis variable stars.

Other variable stars are U Camelopardalis, VZ Camelopardalis, and Mira variables T Camelopardalis, X Camelopardalis, and R Camelopardalis.[9] RU Camelopardalis is one of the brighter Type II Cepheids visible in the night sky.

In 2011 a supernova was discovered in the constellation.[11]

Deep-sky objects

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Camelopardalis is in the part of the celestial sphere facing away from the galactic plane. Accordingly, many distant galaxies are visible within its borders.

  • NGC 2403 is a galaxy in the M81 group of galaxies, located approximately 12 million light-years from Earth[12][1] with a redshift of 0.00043. It is classified as being between an elliptical and a spiral galaxy because it has faint arms and a large central bulge. NGC 2403 was first discovered by the 18th century astronomer William Herschel, who was working in England at the time.[12] It has an integrated magnitude of 8.0 and is approximately 0.25° long.[1]
  • NGC 1502 is a magnitude 6.9 open cluster about 3,000 light years from Earth. It has about 45 bright members, and features also a double star of magnitude 7.0 at its center.[13] NGC 1502 is also associated with Kemble's Cascade, a simple but beautiful asterism appearing in the sky as a chain of stars 2.5° long that is parallel to the Milky Way and is pointed towards Cassiopeia.[1] * NGC 1501 is a planetary nebula located roughly 1.4° south of NGC 1502.
  • Stock 23 is an open star cluster at the southern part of the border between Camelopardalis and Cassiopeia. It is also known as Pazmino's Cluster. It could be categorized as an asterism because of the small number of stars in it (a small telescopic constellation).
  • IC 342 is one of the brightest two galaxies in the IC 342/Maffei Group of galaxies.
  • The dwarf irregular galaxy NGC 1569 is a magnitude 11.9 starburst galaxy, about 11 million light years away.
  • NGC 2655 is a large lenticular galaxy with visual magnitude 10.1.
  • UGC 3697 is known as the Integral Sign Galaxy (its location is 7:11:4 / +71°50').
  • MS0735.6+7421 is a galaxy cluster with a redshift of 0.216, located 2.6 billion light-years from Earth. It is unique for its intracluster medium, which emits X-rays at a very high rate. This galaxy cluster features two cavities 600,000 light-years in diameter, caused by its central supermassive black hole, which emits jets of matter. MS0735.6+7421 is one of the largest and most distant examples of this phenomenon.[12]
  • Tombaugh 5 is a fairly dim open cluster in Camelopardalis. It has an overall magnitude of 8.4 and is located 5,800 light-years from Earth. It is a Shapley class c and Trumpler class III 1 r cluster, meaning that it is irregularly shaped and appears loose. Though it is detached from the star field, it is not concentrated at its center at all. It has more than 100 stars which do not vary widely in brightness,[14] mostly being of the 15th and 16th magnitude.[15]
  • NGC 2146 is an 11th magnitude barred spiral starburst galaxy conspicuously warped by interaction with a neighbour.
  • MACS0647-JD, one of the possible candidates for the farthest known galaxies in the universe (z= 10.7), is also in Camelopardalis.

Meteor showers

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The annual May meteor shower Camelopardalids from comet 209P/LINEAR have a radiant in Camelopardalis.

History

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Camelopardalis as depicted in Urania's Mirror, a set of constellation cards published in London c.1823. Above it are shown the now-abandoned constellations of Tarandus and Custos Messium.[16]

Camelopardalis is not one of Ptolemy's 48 constellations in the Almagest.[17] It was created by Petrus Plancius in 1613.[1] It first appeared in a globe designed by him and produced by Pieter van den Keere. One year later, Jakob Bartsch featured it in his atlas. Johannes Hevelius depicted this constellation in his works which were so influential that it was referred to as Camelopardali Hevelii or abbreviated as Camelopard. Hevel.

Part of the constellation was hived off to form the constellation Sciurus Volans, the Flying Squirrel, by William Croswell in 1810. However this was not taken up by later cartographers.[18]

Equivalents

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In Chinese astronomy, the stars of Camelopardalis are located within a group of circumpolar stars called the Purple Forbidden Enclosure (紫微垣 Zǐ Wēi Yuán).

See also

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References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Camelopardalis

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from Grokipedia
Camelopardalis is a large but faint constellation in the northern sky, depicting a giraffe, and ranks as the 18th largest of the 88 modern constellations recognized by the International Astronomical Union, spanning 757 square degrees.[1][2] Introduced in 1612 by Dutch cartographer Petrus Plancius on a celestial globe, its name derives from the Latinized Greek term for "camel-leopard," reflecting the animal's long neck and spotted coat.[1][3] Lacking ancient mythological associations, Camelopardalis was created to fill empty regions near the north celestial pole and has no first- or second-magnitude stars, making it challenging to observe without dark skies.[1][2] Positioned between latitudes +90° and -10°, Camelopardalis is visible year-round from most northern locations and becomes circumpolar above about 60° N, with right ascension ranging from 3h 15m to 14h 27m and declination from +52° to +86°.[2] It borders Auriga, Cassiopeia, Cepheus, Draco, Lynx, Perseus, Ursa Major, and Ursa Minor, lying near the north celestial pole in the second quadrant of the northern hemisphere.[2] The constellation's brightest star is Beta Camelopardalis, a yellow supergiant binary system with an apparent magnitude of 4.03, located approximately 900 light-years away.[2] Other notable stars include CS Camelopardalis, a variable blue supergiant binary shining at magnitude 4.19–4.23 roughly 3,000 light-years distant, and Alpha Camelopardalis, a blue supergiant star of magnitude 4.29.[2] Camelopardalis hosts several deep-sky objects of interest to amateur astronomers, including the spiral galaxy NGC 2403, an 8.9-magnitude barred spiral approximately 10 million light-years away, known for its prominent HII regions and supernova activity.[4][2] The open cluster NGC 1502, visible at magnitude 6.7 and about 3,100 light-years distant, anchors Kemble's Cascade, a striking asterism of over 20 stars resembling a flowing chain leading toward it.[2] Additional highlights include the face-on spiral galaxy IC 342 (the "Hidden Galaxy") at magnitude 9.1 and 10.7 million light-years away, partially obscured by Milky Way dust, as well as the Mira-type variable star U Camelopardalis, which exhibits a surrounding bubble nebula from its stellar winds.[2][5] The constellation is also the radiant point for the annual Camelopardalid meteor shower in late May, associated with Comet 209P/LINEAR.[6]

Names and Etymology

Etymology

The name Camelopardalis derives from the Latin camelopardalis, a compound word formed from the Greek kamēlos (κάμηλος), meaning "camel," which alludes to the animal's long neck, and pardalis (πάρδαλις), meaning "leopard" or "panther," referring to its spotted coat; this directly translates to "giraffe," the creature the constellation represents.[7][2][8] Petrus Plancius, a Dutch astronomer and cartographer, first introduced the name Camelopardalis for this constellation in 1612–1613, placing it on a celestial globe to fill an empty region in the northern sky; it was later depicted in print by Jakob Bartsch in 1624. Historical spellings include Camelopardalus and Camelopardus on some older maps.[7][2][8] As a modern invention without roots in ancient mythology, Camelopardalis lacks the mythological associations common to classical constellations, with its naming purely descriptive and tied to the giraffe's physical characteristics rather than any Greek or Roman lore.[7][1]

Alternative Names and Designations

The International Astronomical Union (IAU) designates Camelopardalis with the official three-letter abbreviation "Cam" and the genitive form "Camelopardalis," used in astronomical catalogs and nomenclature.[9] Stars within the constellation are identified using Bayer designations, which assign Greek letters prefixed to the genitive (e.g., α Camelopardalis for the brightest star) based on apparent magnitude, and Flamsteed designations, which use sequential numbers followed by the genitive (e.g., 23 Camelopardalis).[10] In Chinese astronomy, the constellation is known as 鹿豹座 (Lù bào zuò), translating to "leopard-deer constellation," an adaptation that evokes a chimeric animal similar to the Western giraffe imagery but incorporating local fauna.[11]

History and Cultural Representations

Historical Introduction

Camelopardalis, a faint constellation representing a giraffe in the northern celestial sky, was introduced by the Dutch cartographer and theologian Petrus Plancius in 1612–1613 to delineate previously uncharted regions between the established constellations of Ursa Major, Draco, and Cepheus.[7] Plancius designed the figure for inclusion on a 26.5 cm celestial globe produced in Amsterdam by Pieter van den Keere, marking the constellation's debut in printed form.[12] This addition addressed gaps in the traditional star maps derived from ancient Greek astronomy, incorporating sparse stars into a coherent pattern without altering prior configurations.[1] The constellation received its first extensive visual and descriptive treatment in the star atlas Firmamentum Sobiescianum sive uranographia, compiled by Polish astronomer Johannes Hevelius and published posthumously in 1690 by his wife Elisabetha.[13] In this work, spanning over 500 pages with detailed engravings, Hevelius illustrated Camelopardalis as a long-necked giraffe, emphasizing its serpentine form amid the dim stars of the region, and cataloged its principal stars with positional data refined through his own observations from Gdańsk.[14] Hevelius's atlas solidified the constellation's place in astronomical literature, influencing subsequent cartographers despite its obscurity due to the faintness of its components.[15] Notably absent from Claudius Ptolemy's Almagest (2nd century AD), which enumerated 48 ancient constellations based on Hellenistic traditions, Camelopardalis lacks any documentation in Western astronomy prior to the 17th century, underscoring its status as a Renaissance-era innovation.[16] This post-Ptolemaic origin reflects the era's expansion of celestial mapping to encompass the full northern hemisphere, driven by advancements in navigation and exploration.[17]

Significance in Different Cultures

In traditional Chinese uranography, which originated around the 4th century BC and was systematized during the Han dynasty (circa 206 BC–220 AD), the stars comprising the modern constellation Camelopardalis are integrated into the Three Enclosures (Sān Yuán), particularly the Purple Forbidden Enclosure (Zǐ Wēi Yuán). This northern celestial region symbolizes the emperor's palace, with Camelopardalis stars distributed across imperial-themed asterisms such as the Guest House (Chuánshè), consisting of stars including CS Camelopardalis and serving as a lodging for officials, and the Eight Kinds of Crops (Bāgǔ), a group of faint stars representing agricultural bounty. Unlike the unified giraffe depiction in Western astronomy, these stars hold no cohesive animal form but contribute to a hierarchical cosmic court structure emphasizing governance and order. The constellation's faintness—lacking stars brighter than magnitude 4—and its position near the north celestial pole limited its visibility and cultural prominence in non-Western traditions outside East Asia. In Indigenous North American astronomical lore, such as among the Inuit or various Plains tribes, no distinct patterns or stories align directly with Camelopardalis, though some northern star groups occasionally overlap in folklore with adjacent figures like Draco (the dragon) or Ursa Minor (the little bear), without specific giraffe equivalents. Similarly, Middle Eastern traditions, including Arabic and Persian uranography from the Islamic Golden Age, show no notable representations, as the region's observers focused on brighter southern and equatorial asterisms for navigation and calendars. Today, Camelopardalis enjoys standardized global recognition solely through the International Astronomical Union's (IAU) delimited boundaries, established in 1922, serving primarily as a modern reference for cataloging faint stars and deep-sky objects rather than bearing mythological significance.

Astronomical Characteristics

Position and Visibility

Camelopardalis is situated in the northern celestial hemisphere, spanning right ascension approximately from 3h to 14h and declination from +52.7° to +86.1°.[https://www.go-astronomy.com/constellations.php?Name=Camelopardalis] It borders the constellations Ursa Minor, Draco, Lynx, Auriga, Perseus, Cassiopeia, Cepheus, and Ursa Major, occupying a region near the north celestial pole.[https://astro4edu.org/resources/diagram/1v1540710v51/] The constellation is fully circumpolar for observers at latitudes above approximately 38° N, remaining visible year-round across much of Europe and North America without setting below the horizon.[https://www.go-astronomy.com/constellations.php?Name=Camelopardalis] It is best observed in March, when its central region transits the meridian at local midnight and culminates at approximately 70° declination, positioning it high in the sky for optimal viewing.[http://www.seasky.org/constellations/constellation-camelopardalis.html] Overall, Camelopardalis is extremely faint, with no stars brighter than magnitude 4.0, necessitating dark skies away from light pollution and often binoculars or a small telescope to discern its sparse pattern.[https://www.go-astronomy.com/constellations.php?Name=Camelopardalis] The "head" of the giraffe lies near Polaris in Ursa Minor, while the elongated body extends southward toward Auriga, rendering the constellation particularly challenging for urban observers where its dim stars blend into the background.[https://earthsky.org/constellations/camelopardalis-the-giraffe-north-circumpolar/]

Size and Boundaries

Camelopardalis ranks as the 18th-largest of the 88 modern constellations recognized by the International Astronomical Union (IAU), spanning an area of 757 square degrees, equivalent to about 1.8% of the total celestial sphere.[2][18] The official boundaries of Camelopardalis were delineated in 1930 by Belgian astronomer Eugène Delporte under IAU auspices, creating an irregular polygonal region aligned primarily along lines of constant right ascension and declination for the epoch B1875.0. These borders encompass right ascension from approximately 3h 16m to 14h 27m and declination from +52.7° to +86.1°, incorporating the region encircling the north celestial pole without including the pole itself, which lies in Ursa Minor. This configuration results from Delporte's methodology to ensure every point on the celestial sphere belongs to exactly one constellation, avoiding overlaps or gaps.[19] (Note: Delporte's original publication) In terms of comparative scale, Camelopardalis exceeds the area of the well-known constellation Orion (594 square degrees) but is distinguished by its overall faintness, with no stars brighter than magnitude 4. Compared to denser regions, it includes faint extensions of the Milky Way's edge near its southern boundary but consists mainly of a sparse field of dim stars and interstellar space, contributing to its challenging visibility despite its size.[2][19]

Celestial Objects in Camelopardalis

Stars

Camelopardalis contains no stars brighter than apparent magnitude 4.0, making it a challenging constellation for naked-eye observation due to its overall faintness.[1] The brightest star in the constellation is Beta Camelopardalis (β Cam), a yellow supergiant binary system of spectral type G1 Ib-IIa with an apparent magnitude of 4.03, located approximately 850 light-years away.[2] Among other notable stars, Alpha Camelopardalis (α Cam) is a blue supergiant of spectral type O9.5 Iab shining at magnitude 4.3 and situated about 6,000 light-years distant. CS Camelopardalis is a variable blue supergiant of spectral type B9 Ia with an apparent magnitude ranging from 4.19 to 4.23, found roughly 3,000 light-years from Earth. Z Camelopardalis serves as the prototype for dwarf novae, exhibiting variability between magnitudes 10 and 14 at a distance of around 740 light-years. Additionally, 11 Camelopardalis is a magnitude 5.2 binary system approximately 650 light-years away. U Camelopardalis is a Mira-type long-period variable star that has formed a surrounding bubble nebula due to its stellar winds.[2] A prominent double star in Camelopardalis is Σ 1694, featuring components of magnitudes 5.4 and 5.9 separated by 7.5 arcseconds, at an estimated distance of 300 light-years. The constellation also includes stars with traditional Arabic names, such as Aldhibah for ζ Cam and Biham for μ Cam, reflecting historical linguistic influences on stellar nomenclature.[2][8] These variable and binary systems stand out as key highlights amid the constellation's predominantly faint stellar field.[2]

Deep-Sky Objects

Camelopardalis hosts several notable deep-sky objects, including galaxies and star clusters that highlight the constellation's role in studying nearby galactic structures and high-redshift phenomena. Among the most prominent is the spiral galaxy NGC 2403, an SAB(s)cd-type galaxy with an apparent visual magnitude of 8.9, located approximately 10.4 million light-years away as a member of the M81 Group. This galaxy exhibits active star formation, contributing to its bright, intricate spiral arms observable in amateur telescopes under dark skies. It gained attention for hosting the Type II-P supernova 2004dj, one of the nearest such events since SN 1987A, which peaked at an apparent magnitude of 11.2 and provided valuable data on stellar explosions in nearby systems. Another significant spiral galaxy in the constellation is IC 342, with an apparent magnitude of 9.1, though intrinsically brighter by about 2 magnitudes due to heavy obscuration by Milky Way dust in the Zone of Avoidance. Situated roughly 11 million light-years distant, it forms part of the IC 342/Maffei Group and presents a challenging observational target, requiring infrared or long-exposure optical imaging to reveal its face-on spiral structure and central starburst regions. The dust extinction dims its brightness by up to 2 magnitudes, making it one of the brightest galaxies obscured from easy view. The irregular dwarf galaxy NGC 1569, classified as a starburst galaxy with an apparent magnitude of 11.9, lies about 11 million light-years away and is renowned for its intense star formation rate, producing stars at over 100 times the Milky Way's pace. This activity drives powerful outflows of gas and metals, offering insights into galactic evolution in low-mass systems. Also within Camelopardalis is the open cluster NGC 1502, discovered by William Herschel on November 3, 1787, which shines at an apparent magnitude of 6.9 and contains approximately 45 stars spanning about 9 arcminutes, located roughly 3,000 light-years from Earth. The cluster is associated with an emission nebula, enhancing its visibility in hydrogen-alpha filters. Adding visual interest is Kemble's Cascade, an asterism of more than 20 stars ranging from 5th to 10th magnitude, arranged in a striking linear chain spanning about 3 degrees near NGC 1502, resembling a flowing waterfall and first noted by amateur astronomer Father Lucian Kemble in the 1970s. For high-redshift studies, Camelopardalis includes MACS0647-JD, a triply lensed galaxy candidate at a spectroscopic redshift of approximately z=10.17 (initially estimated at z~11), corresponding to a light-travel distance of about 13.3 billion light-years. Recent James Webb Space Telescope observations confirm its status as a potential early galaxy merger, resolving it into components less than 600 light-years across and providing key data on cosmic dawn reionization.

Meteor Showers

Camelopardalis is home to two minor meteor showers: the May Camelopardalids and the October Camelopardalids, both of which exhibit low activity levels and are best observed under dark sky conditions due to the constellation's faint stars.[20][21] The May Camelopardalids (IAU code 451 CAM) are active from May 8 to May 19, with a peak around May 15.[22] Their radiant is located at right ascension 7h 44m, declination +76°, within the boundaries of Camelopardalis.[22] This shower is associated with dust particles from the periodic comet 209P/LINEAR, producing slow-moving meteors at approximately 16 km/s.[23] Typical zenithal hourly rates (ZHR) range from 2 to 5, though an outburst in 2014 reached higher rates of up to 15 due to a fresh debris trail encounter.[20][23] Historical observations of this shower were limited prior to its confirmation in 2014, as its low activity made detection challenging despite predictions dating back to 2006.[21][23] The October Camelopardalids (IAU code 281 OCT) are active from October 5 to 6, peaking around October 6, though some broader activity may extend from October 2 to 17 in variable conditions.[24] The radiant lies at right ascension 10h 56m (164°), declination +79°, also in Camelopardalis.[24] Linked to an unknown parent body, this shower produces meteors at about 47 km/s and is generally very weak, with ZHR typically less than 1, though tentative estimates suggest up to 5 under ideal circumstances.[24] Recent observations, including in 2016 and 2022, have noted occasional short bursts, highlighting its potential for variable activity despite its minor status.[25][26] Neither shower is considered major, and their observation is hindered by the constellation's northern position and lack of bright reference stars, necessitating clear, moonless nights away from light pollution for any chance of detection.[24][21]
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