|Extrasolar planet||List of extrasolar planets|
|Star||Kepler-68 (KOI 246)|
|Right ascension||(α)||19h 24m 07.76s|
|Declination||(δ)||+49° 02′ 25″|
|Age||6.3 ± 1.7 Gyr|
|Maximum mass||(m sin i)||7.3 M⊕|
|Density||(ρ)||5–40 g cm−3|
|Semimajor axis||(a)||0.09059 AU|
|Orbital period||(P)||9.605085 d|
|Inclination||(i)||86.93 ± 0.41°|
|Discovery date||12 February 2013|
|Discovery method||Transit (Kepler Mission)|
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) 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.
- Gilliland, Ronald L. "Kepler-68: Three Planets, One With a Density Between That of Earth and Ice Giants". Cornell University. Retrieved 28 February 2013.
- Nasa. "Kepler Discoveries". Nasa.gov. Retrieved 28 February 2013.
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