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Kepler-68c

Artist's impression of Kepler-68 c and size comparison with Earth
Discovery
Discovered by	Gilliland et al.
Discovery site	Kepler Space Observatory
Discovery date	2013
Detection method	Transits, and transit-timing variations
Designations
Alternative names	KOI-246.01
Orbital characteristics
Semi-major axis	0.09059±0.00082 AU
Orbital period (sidereal)	9.605085±0.000072 d
Inclination	86.93±0.41 º
Semi-amplitude	0.59+0.50 −0.52 m/s
Star	Kepler-68
Physical characteristics
Mean radius	0.953+0.037 −0.042 R🜨
Mass	2.02+1.72 −1.78 M🜨

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
_−3.6 times that of Earth (0.015 M_J) and a radius of 0.953
_−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.

See also

• List of planets discovered by the Kepler spacecraft

References

1. ^ 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 (1). 40. arXiv:1302.2596. Bibcode:2013ApJ...766...40G. doi:10.1088/0004-637X/766/1/40.
2. "Kepler-68b". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-06.
3. ^ Mills, Sean M.; et al. (2019). "Long-period Giant Companions to Three Compact, Multiplanet Systems". The Astronomical Journal. 157 (4). 145. arXiv:1903.07186. Bibcode:2019AJ....157..145M. doi:10.3847/1538-3881/ab0899. S2CID 119197547.
4. Nasa. "Kepler Discoveries". Nasa.gov. Archived from the original on 27 May 2010. Retrieved 28 February 2013.

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