Discovery date February 12, 2013 Semi-major axis 1.4±0.03 AU Orbital period 580±50 d | Detection method Radial velocity Eccentricity 0.18 ± 0.05 Mass ≥0.947 Mj | |
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Kepler-68d is a gas giant with the minimum mass about the same as Jupiter. It is at least a jovian-mass planet orbiting 1.4 astronomical units from its parent star, Kepler-68, well within habitable zone of the star. It was detected by radial velocity.
After planets Kepler-68b and c were detected by observing planetary transits in front of its star, doppler spectroscopy measurements were used to make follow-up observations of the star. Kepler-68d was discovered using that method.
References
Kepler-68d Wikipedia(Text) CC BY-SA