Kepler-68d

Kepler-68d

Discovery
Discovery date	February 12, 2013
Detection method	Radial velocity
Orbital characteristics
Periastron	1.148 AU
Apoastron	1.652 AU
Semi-major axis	1.4±0.03 AU [1]
Eccentricity	0.18 ± 0.05
Orbital period (sidereal)	580±50 d
Physical characteristics
Mass	≥0.947 Mj

Kepler-68d is a gas giant with a 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 the habitable zone of the star. ^[2] It was detected by radial velocity. ^[3]

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

1. "Kepler Discoveries". kepler.nasa.gov. Archived from the original on May 27, 2010. Retrieved February 26, 2013.
2. 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. S2CID   7203273.
3. Exoplanet. "Planet Kepler-68 d". Exoplanet.eu. Archived from the original on 16 February 2014. Retrieved 28 February 2013.

External links

• Table of confirmed planets at NASA, Kepler mission