GJ 4256 b

Last updated
GJ 4256 b
Discovery
Discovery date2024
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

    1. 1 2 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 .
    2. ↑ Cowing, Keith (2024-08-01). "An Earth-sized Planet On The Verge Of Tidal Disruption". Astrobiology. Retrieved 2025-04-29.
    3. ↑ Martin, Pierre-Yves (2025). "Planet TOI-6255 b". exoplanet.eu. Retrieved 2025-04-29.
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