Kepler-68c

Kepler-68c
Exoplanet List of exoplanets
Parent star
Star Kepler-68 (KOI-246)
Constellation Cygnus
Right ascension (α) 19h 24m 07.7651s[1]
Declination (δ) +49° 02′ 24.936″[1]
Apparent magnitude (mV) 8.588
Distance490±20[1] ly
(149±5[1] pc)
Mass (m) 1.079±0.051 M☉
Radius (r) 1.243±0.019 R☉
Temperature (T) 5793±74 K
Metallicity [Fe/H] 0.12±0.074
Age 6.3 ± 1.7 Gyr
Physical characteristics
Maximum mass(m sin i)7.3 M⊕
Radius(r)0.953 R⊕
Density(ρ)5–40 g cm−3
Temperature (T) 944 K (671 °C; 1,240 °F)
Orbital elements
Semi-major axis(a) 0.09059 AU
Orbital period(P) 9.605085 d
Inclination (i) 86.93 ± 0.41°
Discovery information
Discovery date 12 February 2013
Discoverer(s)
Discovery method Transit (Kepler Mission)
Discovery status Confirmed
Other designations
KOI 246.02

Kepler-68c is an Earth-sized planet orbiting the star Kepler-68 in the constellation of Cygnus. It was discovered by planetary-transit methods by the Kepler space telescope in February 2013. It has a mass of 4.8+2.5
−3.6 times that of Earth (0.015 MJ)[2] and a radius of 0.953+0.037
−0.042 Earth radii. It has an orbital period of 9.605085 days at a distance of about 0.09059 AU from its star. Relatively wide constraints on Kepler-68c's mass are the result lack of detection of the planet through radial-velocity and transit-timing-variation methods.[3]

See also

References

  1. 1 2 3 4 Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
  2. ↑ Gilliland, Ronald L.; et al. (2013). "Kepler-68: Three Planets, One with a Density Between That of Earth and Ice Giants". The Astrophysical Journal. 766. 40. arXiv:1302.2596. Bibcode:2013ApJ...766...40G. doi:10.1088/0004-637X/766/1/40.
  3. ↑ Nasa. "Kepler Discoveries". Nasa.gov. Retrieved 28 February 2013.


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