Kepler-68b
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 MJ).[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] | |
| 0.06170±0.00056 AU | |
| 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
- 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 2019-10-30.
- 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.
- Marcy, Geoffrey W.; et al. (2014). "Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets". The Astrophysical Journal Supplement Series. 210 (2). 20. arXiv:1401.4195. Bibcode:2014ApJS..210...20M. doi:10.1088/0067-0049/210/2/20.
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