| 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 |
| Eccentricity | 0.18 ± 0.05 |
| Orbital period (sidereal) | 580±50 d |
| Physical characteristics | |
| Mass | ≥0.947 Mj |
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 Discoveries". kepler.nasa.gov. Archived from the original on May 27, 2010. Retrieved February 26, 2013.
- 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.
- 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
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