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K2-3c also known as EPIC 201367065 c is an exoplanet orbiting K2-3 a red dwarf every 24 days. It is 144 ly away.[4] It has a density of 1.82g/cm3, indicating that it could be a Gas dwarf or a mini-Neptune. It is one of the smallest gas planets ever discovered. Despite not being the smallest planet in the system by radius,[5] by mass it is by far the least massive, with a mass only double that of Earth.[5]

K2-3c
Discovery[1]
Discovery siteKepler Space Observatory
Discovery date2015
Detection method
Transit
Orbital characteristics
Semi-major axis
0.1413+0.0044
−0.0047 AU
Eccentricity0.04±0.04[2]
Orbital period (sidereal)
24.64638±0.00017[3] d
Inclination89.70±0.20[2]
Semi-amplitude0.95±0.37[3]
StarK2-3
Physical characteristics
Mean radius
1.77±0.18[3] REarth
Mass3.1+1.3
−1.2[3] MEarth
Mean density
3.1+1.9
−1.3 g cm−3
Temperature374 K (101 °C; 214 °F)

    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. arXiv:1501.03798. Bibcode:2015ApJ...804...10C. doi:10.1088/0004-637X/804/1/10.
    2. "K2-3 c CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-17.
    3. Damasso, Mario; et al. (2018). "Eyes on K2-3: A system of three likely sub-Neptunes characterized with HARPS-N and HARPS". Astronomy and Astrophysics. 615. A69. arXiv:1802.08320. Bibcode:2018A&A...615A..69D. doi:10.1051/0004-6361/201732459. S2CID 58923147.
    4. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
    5. "K2-3 PLANET HOST PAGE". NASA Exoplanet Archive. Retrieved 2015-10-17.


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