K2-3c

K2-3c
Exoplanet List of exoplanets
Size comparison
Earth K2-3c
Parent star
Star K2-3
Constellation Leo[1]
Right ascension (α) 11h 29m 20.3918s[2]
Declination (δ) −01° 27′ 17.280″[2]
Apparent magnitude (mV) 12.168±0.009[3]
Distance143.9±0.4[2] ly
(44.1±0.1[2] pc)
Mass (m) 0.612±0.086[4] M☉
Radius (r) 0.553±0.041[4] R☉
Temperature (T) 3835±70[5] K
Metallicity [Fe/H] −0.01±0.09[5]
Age ≥1[6] Gyr
Physical characteristics
Mass(m)3.1+1.3
−1.2[5] M⊕
Radius(r)1.77±0.18[5] R⊕
Density(ρ)3.1+1.9
−1.3[5] g cm−3
Temperature (T) 374 K (101 °C; 214 °F)
Orbital elements
Semi-major axis(a) 0.1413+0.0044
−0.0047[5] AU
Eccentricity (e) 0.04±0.04[4]
Orbital period(P) 24.64638±0.00017[5] d
Inclination (i) 89.70±0.20[4]°
Time of transit (Tt) 2456812.2777±0.0026[5] JD
Semi-amplitude (K) 0.95±0.37[5] m/s
Discovery information
Discovery date 2015
Discoverer(s)
Discovery method Transit
Discovery site Kepler Space Observatory
Discovery status Confirmed[6]

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.[2] 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,[7] by mass it is by far the least massive, with a mass only double that of Earth.[7]

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
  2. 1 2 3 4 5 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.
  3. ↑ Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H. Vizier catalog entry
  4. 1 2 3 4 "K2-3 c CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-17.
  5. 1 2 3 4 5 6 7 8 9 Damasso, M.; 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.
  6. 1 2 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.
  7. 1 2 "K2-3 PLANET HOST PAGE". NASA Exoplanet Archive. Retrieved 2015-10-17.


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