 Size comparison of the planet K2-146b (artistic concept) with Earth | |
| Discovery | |
|---|---|
| Discovery site | Kepler Space Observatory |
| Detection method | Transit |
| Orbital characteristics | |
| Star | K2-146 |
K2-146b is a Neptune-like exoplanet discovered in 2018 by the Kepler Space Telescope that orbits a low-mass M-type star in the constellation Cancer. Its host star, K2-146, is orbited by another planet named K2-146c. The planet orbits K2-146 at a distance of 0.0248 AU (3,710,000 km), fifteen times closer than Mercury is to the Sun (0.3871 AU). Thus, it orbits very rapidly, with one year lasting just 2.64 days (63 hours), and is far too hot to be habitable, with an equilibrium temperature of 534 K (261 °C; 502 °F).
References
- "K2-146 b". Exoplanets Exploration. 2018.
- Lazaro, Enrico (March 13, 2018). "Kepler Finds Twelve Exoplanets around Low-Mass Stars". Sci-News.com.
- ^ Lam, Kristine W. F.; et al. (2020-03-01). "It Takes Two Planets in Resonance to Tango around K2-146". The Astronomical Journal. 159 (3): 120. arXiv:1907.11141. doi:10.3847/1538-3881/ab66c9. ISSN 0004-6256.
- Williams, D.R. "Mercury Fact Sheet". NASA Goddard Space Flight Center. Retrieved 2024-08-02.
- Hamann, Aaron; Montet, Benjamin T.; Fabrycky, Daniel C.; Agol, Eric; Kruse, Ethan (2019-09-01). "K2-146: Discovery of Planet c, Precise Masses from Transit Timing, and Observed Precession". The Astronomical Journal. 158 (3): 133. arXiv:1907.10620. doi:10.3847/1538-3881/ab32e3. ISSN 0004-6256.
- Livingston, John H.; et al. (2018-12-01). "Sixty Validated Planets from K2 Campaigns 5–8". The Astronomical Journal. 156 (6): 277. arXiv:1810.04074. doi:10.3847/1538-3881/aae778. ISSN 0004-6256.
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