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GJ 1002 b

GJ 1002 b
Discovery[1]
Discovery dateDecember 2022
Radial velocity
Orbital characteristics[1]
0.0457±0.0013 AU
10.3465±0.027 d
Semi-amplitude1.31±0.14 m/s
StarGJ 1002
Physical characteristics[1]
Mass≥1.08±0.13 M🜨

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]

Detection

GJ 1002 b was detected in 2022 via the radial velocity method, which was used to measure the planet's minimum mass.[1]

Host star

The 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

  1. ^ 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.
  2. ^ "EarthSky | 2 possibly Earth-like worlds, just 16 light-years away". earthsky.org. 2022-12-29. Retrieved 2023-01-08.
  3. ^ "PHL @ UPR Arecibo - Earth Similarity Index (ESI)". phl.upr.edu. Retrieved 2023-01-08.
  4. ^ Nowakowski, Tomasz; Phys.org. "Two Earth-mass exoplanets orbiting nearby star discovered". phys.org. Retrieved 2023-01-08.
  5. ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2023-08-28.
  6. ^ "The Extrasolar Planet Encyclopaedia — GJ 1002 b". Extrasolar Planets Encyclopaedia. Retrieved 2023-08-28.


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