GJ 1002 b (also designated as Gliese 1002 b) is a potentially habitable exoplanet located 16 light-years away, in the constellation of Cetus.[1] The planet, which has an Earth Similarity Index of 86%, is in the habitable zone of its parent star.[2] GJ 1002 b has a minimum mass of 1.08 Earth masses and is estimated by the Planetary Habitability Laboratory to have 1.03 times the radius of Earth and a surface temperature of 261 Kelvin.[3]
| Discovery[1] | |
|---|---|
| Discovery date | December 2022 |
| Radial velocity | |
| Orbital characteristics[1] | |
| 0.0457±0.0013 AU | |
| 10.3465±0.027 d | |
| Semi-amplitude | 1.31±0.14 m/s |
| Star | GJ 1002 |
| Physical characteristics[1] | |
| Mass | ≥1.08±0.13 M🜨 |
Detection
editGJ 1002 b was detected in 2022 via the radial velocity method, which was used to measure the planet's minimum mass.[1]
Host star
editThe host star, GJ 1002, is a quiet M5.5V type red dwarf not believed to release flares that could harm the atmosphere.[4] The planet orbits its host star at a distance of 0.0457 AU (Astronomical units), with a 10.3 day orbital period and a 0.0 eccentricity.[5][6]
References
edit- ^ a b c d e Suárez Mascareño, A.; González-Alvarez, E.; et al. (December 2022). "Two temperate Earth-mass planets orbiting the nearby star GJ 1002". Astronomy & Astrophysics. 670: A5. arXiv:2212.07332. Bibcode:2023A&A...670A...5S. doi:10.1051/0004-6361/202244991. S2CID 254353639.
- ^ "EarthSky | 2 possibly Earth-like worlds, just 16 light-years away". earthsky.org. 2022-12-29. Retrieved 2023-01-08.
- ^ "PHL @ UPR Arecibo - Earth Similarity Index (ESI)". phl.upr.edu. Retrieved 2023-01-08.
- ^ Nowakowski, Tomasz; Phys.org. "Two Earth-mass exoplanets orbiting nearby star discovered". phys.org. Retrieved 2023-01-08.
- ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2023-08-28.
- ^ "The Extrasolar Planet Encyclopaedia — GJ 1002 b". Extrasolar Planets Encyclopaedia. Retrieved 2023-08-28.
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