Astronomy:K2-146b

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K2-146b
Size comparison of the planet K2-146b (artistic concept) with Earth
Discovery
Discovery siteKepler Space Observatory
Transit
Orbital characteristics
StarK2-146


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.[1][2] Its host star, K2-146, is orbited by another planet named K2-146c.[3] The planet orbits K2-146 at a distance of 0.0248 AU (3,710,000 km),[3] fifteen times closer than Mercury is to the Sun (0.3871 AU[4]). Thus, it orbits very rapidly, with one year lasting just 2.64 days (63 hours),[5] and is far too hot to be habitable, with an equilibrium temperature of 534 K (261 °C; 502 °F).[6]

References

  1. ↑ "K2-146 b". Exoplanets Exploration. 2018. https://exoplanets.nasa.gov/newworldsatlas/6167/. 
  2. ↑ Lazaro, Enrico (March 13, 2018). "Kepler Finds Twelve Exoplanets around Low-Mass Stars". Sci-News.com. http://www.sci-news.com/astronomy/kepler-twelve-exoplanets-low-mass-stars-05811.html. 
  3. ↑ 3.0 3.1 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. doi:10.3847/1538-3881/ab66c9. ISSN 0004-6256. 
  4. ↑ Williams, D.R.. "Mercury Fact Sheet". NASA Goddard Space Flight Center. http://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html. 
  5. ↑ 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. doi:10.3847/1538-3881/ab32e3. ISSN 0004-6256. 
  6. ↑ Livingston, John H. et al. (2018-12-01). "Sixty Validated Planets from K2 Campaigns 5–8". The Astronomical Journal 156 (6): 277. doi:10.3847/1538-3881/aae778. ISSN 0004-6256. 



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