GJ 4256 b
| Discovery | |
|---|---|
| Discovery date | 2024 |
| Transit | |
| Orbital characteristics | |
| 0.0054 | |
| Eccentricity | 0.0 |
| 0.23818244 d | |
| Inclination | 74.4 |
| Star | GJ 4256 |
| Physical characteristics | |
| Mass | 1.44 M🜨 |
| Temperature | 1300 K |
GJ 4256 b (also known as TOI-6255 b) is an ultra-short period Earth-size terrestrial exoplanet located 20.3 parsecs from Earth orbiting the red dwarf star GJ 4256.[1][2] lt orbita the star at a distance of 0.0054 AU and has an orbital period of just 0.23 days.[3]
The planet orbits so close to the host star that it has nearly passed the roche limit. This causes the planet to be pulled into an egg-like shape. It is predicted that in around 400 million years, the planet will be ripped apart and engulfed by the star.[1]
References
- ^ a b Dai, Fei; et al. (2024). "An Earth-sized Planet on the Verge of Tidal Disruption". The Astronomical Journal. 168 (3): 101. arXiv:2407.21167. Bibcode:2024AJ....168..101D. doi:10.3847/1538-3881/ad5a7d.
- ^ Cowing, Keith (2024-08-01). "An Earth-sized Planet On The Verge Of Tidal Disruption". Astrobiology. Retrieved 2025-04-29.
- ^ Martin, Pierre-Yves (2025). "Planet TOI-6255 b". exoplanet.eu. Retrieved 2025-04-29.