Astronomy:K2-3c

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Short description: Extrasolar planet
K2-3c
Discovery[1]
Discovery siteKepler Space Observatory
Discovery date2015
Transit
Orbital characteristics[2]
0.1357+0.0023
−0.0022 astronomical unit|AU
Eccentricity0.048+0.073
−0.035
Orbital period24.646729+0.000044
−0.000042 d
Inclination89.84°+0.11°
−0.14°
−180°+100°
−110°
Semi-amplitude0.88±0.28 m/s
StarK2-3
Physical characteristics[2]
Mean radius1.582+0.057
−0.051 R⊕
Mass2.68±0.85 M⊕
Mean density3.7±1.2 g/cm3
Physics371.8+3.8
−3.9 K (98.7 °C; 209.6 °F, equilibrium)


K2-3c, also known as EPIC 201367065 c, is an exoplanet orbiting the red dwarf star K2-3 every 24 days. It is 143 light-years away.[3] It has a density of about 3.7 g/cm3, indicating that it could be an ocean world or a mini-Neptune. It is the second-smallest planet in the system by both radius and mass, with a mass almost three times that of Earth.[4]

References

  1. ↑ Crossfield, Ian J. M. et al. (2015). "A Nearby M Star with Three Transiting Super-Earths Discovered by K2". The Astrophysical Journal 804 (1): 10. doi:10.1088/0004-637X/804/1/10. Bibcode: 2015ApJ...804...10C. 
  2. ↑ 2.0 2.1 Diamond-Lowe, Hannah; Kreidberg, Laura; Harman, C. E.; Kempton, Eliza M.-R.; Rogers, Leslie A.; Joyce, Simon R. G.; Eastman, Jason D.; King, George W. et al. (2022), "The K2-3 System Revisited: Testing Photoevaporation and Core-powered Mass Loss with Three Small Planets Spanning the Radius Valley", The Astronomical Journal 164 (5): 172, doi:10.3847/1538-3881/ac7807, Bibcode: 2022AJ....164..172D 
  3. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ "K2-3 PLANET HOST PAGE". NASA Exoplanet Archive. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=K2-3&type=PLANET_HOST. Retrieved 2015-10-17. 



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