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Kepler-68b is an exoplanet orbiting the Sun-like star Kepler-68 in the constellation of Cygnus. Discovered by planetary-transit methods by the Kepler space telescope in February 2013, it has a radius of 2.31 ± 0.07 that of Earth and a density of 2.46–4.3 g/cm³. It has an orbital period of 5.398763 days at a distance of about 0.0617 AU from its star.[1] Doppler measurements were made to determine its mass to be 5.79 times that of Earth (0.026 M_J).[4]

Kepler-68b

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	0.06170±0.00056 AU
Orbital period (sidereal)	5.398763 d
Inclination	87.60±0.90 º
Semi-amplitude	2.7+0.48 −0.46 m/s
Star	Kepler-68
Physical characteristics[3]
Mean radius	2.31+0.06 −0.09 R🜨
Mass	7.65+1.37 −1.32 M🜨

With a density of 2.6 g/cm³ it has physical characteristics of both a super-Earth and a mini-Neptune.[4]

See also

• List of planets discovered by the Kepler spacecraft

References

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