Astronomy:Kepler-68b
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| 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 astronomical unit|AU | |
| Orbital period | 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⊕ |
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]
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
- ↑ 1.0 1.1 1.2 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. doi:10.1088/0004-637X/766/1/40. Bibcode: 2013ApJ...766...40G.
- ↑ "Kepler-68b". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-68b.
- ↑ 3.0 3.1 Mills, Sean M. et al. (2019). "Long-period Giant Companions to Three Compact, Multiplanet Systems". The Astronomical Journal 157 (4): 145. doi:10.3847/1538-3881/ab0899. Bibcode: 2019AJ....157..145M.
- ↑ 4.0 4.1 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. doi:10.1088/0067-0049/210/2/20. Bibcode: 2014ApJS..210...20M.
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