Kepler-68c

DiscoveredbyGilliland et al.

DiscoverysiteKepler Space Observatory

Discoverydate2013

Detection method

Transits, and transit-timing variations

Kepler-68c

Artist's impression of Kepler-68 c and size comparison with Earth
Discovery[1]
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[2]
Orbital characteristics[3][1]
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[3]
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^+2.5
_−3.6 times that of Earth (0.015 M_J)^[1] 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.^[4]