Gliese 367 b
Artist's impression and size comparison of Gliese 367 b with Earth and Mars | |
| Discovery | |
|---|---|
| Discovered by | Kristine Lam, et al. |
| Discovery site | TESS |
| Discovery date | December 2021 |
| Transit | |
| Designations | |
| Tahay, TOI-731.01 | |
| Orbital characteristics | |
| 0.00709±0.00027 AU | |
| Eccentricity | 0.06+0.07 −0.04 |
| 0.3219225±0.0000002 d | |
| Inclination | 79.89°+0.87° −0.85° |
| 66°+41° −108° | |
| Semi-amplitude | 1.003±0.078 m/s |
| Star | Gliese 367 |
| Physical characteristics | |
| 0.699±0.024 R🜨 | |
| Mass | 0.633±0.050 M🜨 |
Mean density | 10.2±1.3 g/cm3 |
| Temperature | 1,728±90 K (1,455 °C; 2,651 °F, dayside) <847 K (574 °C; 1,065 °F, nightside) |
Gliese 367 b, formally named Tahay, is a sub-Earth exoplanet orbiting the red dwarf star Gliese 367 (GJ 367), 30.7 light-years (9.4 parsecs) from Earth in the constellation of Vela. The exoplanet takes just 7.7 hours to orbit its star, one of the shortest orbits of any planet.
As of 2025, Gliese 367 b is the smallest known exoplanet within 10 parsecs of the Solar System that has a measured radius, though Proxima Centauri d and the planets of Barnard's Star are less massive and could be smaller.