GJ 1002 b

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]

GJ 1002 b

Discovery[1]
Discovery date	December 2022
Detection method	Radial velocity
Orbital characteristics[1]
Semi-major axis	0.0457±0.0013 AU
Orbital period (sidereal)	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🜨
Temperature	Teq: 230.9 ± 6.7 K (−42.25 ± 6.70 °C; −44.05 ± 12.06 °F)

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]

See also

• Proxima Centauri b, a potentially habitable planet of similar physical characteristics that is also orbiting a small red dwarf star.