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 MJ)[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]
| Discovery[1] | |
|---|---|
| Discovered by | Gilliland et al. |
| Discovery site | Kepler Space Observatory |
| Discovery date | 2013 |
| Transits, and transit-timing variations | |
| Designations | |
| KOI-246.01[2] | |
| Orbital characteristics[3][1] | |
| 0.09059±0.00082 AU | |
| 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🜨 |
See also edit
References edit
- ^ a b c 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.
- ^ "Kepler-68b". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-06.
- ^ a b Mills, Sean M.; et al. (2019). "Long-period Giant Companions to Three Compact, Multiplanet Systems". The Astronomical Journal. 157 (4). 145. arXiv:1903.07186. Bibcode:2019AJ....157..145M. doi:10.3847/1538-3881/ab0899. S2CID 119197547.
- ^ Nasa. "Kepler Discoveries". Nasa.gov. Archived from the original on 27 May 2010. Retrieved 28 February 2013.
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