Rocket Lab Photon
Rocket Lab Photon
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Rocket Lab Photon

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Rocket Lab Photon

Photon is a satellite bus based on Rocket Lab's Electron kick stage. It moves satellites into their appropriate orbits once boosted by rockets such as Electron. It is customizable for uses including LEO payload hosting, lunar flybys, and interplanetary missions.

Photon uses chemical propulsion for orbit adjustments. It can use a variety of engines, such as the Curie and HyperCurie engines, as well as engines from third-party sources, such as the one powering the EscaPADE mission.

Photon first launched in August 2020 on Rocket Lab's I Can't Believe It's Not Optical mission, where it served as a pathfinder. It has since flown three times. It flew the CAPSTONE mission.[citation needed]

Photon communicates on the S-band. Depending on the orbital inclination (37° to Sun-synchronous orbit), it is expected to have a payload capacity of 170 kg (370 lb). The interplanetary version was to have a 40 kg (88 lb) payload capacity.

HyperCurie is an evolution of the Curie engine, which comes in monopropellant and bipropellant versions, while the HyperCurie is hypergolic and electrically pumped.

In April 2019, Rocket Lab announced plans to create a new satellite bus, named Photon, to position small satellites into orbit. Its goal was to reduce complexity and development time, enabling technology demonstrations without developing a full spacecraft. The company aimed to broaden its portfolio and diversify its revenue streams. The company announced it was targeting lunar orbit as part of its services, enabled by a bi-propellant propulsion system. The development of Photon included working with potential customers, with significant interest from government agencies. The first few Photon satellites would be technology demonstrators before transitioning to operational launches for customers, which started with NASA's CAPSTONE cubesat in June 2022.

Rocket Lab planned to launch Photon to Venus in December 2025, delivering a laser-tunable mass spectrometer to the Venusian atmosphere.

Photon is manufactured at Rocket Lab's factory in Huntington Beach, California. It can utilize a variety of engines, including those developed by Rocket Lab itself, such as the Curie and HyperCurie engines, as well as engines from third-party sources, such as the one powering the EscaPADE mission. Photon communicates on S-band. Depending on the orbital inclination (37° to Sun-synchronous orbit), it is expected to have a maximum payload capacity of 170 kg (370 lb). The low Earth orbit version of Photon can take 130 kg (290 lb) to Sun-synchronous orbit.

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