Kepler-68b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | Kepler-68 (KOI 246) | |
| Right ascension | (α) | 19h 24m 07.76s |
| Declination | (δ) | +49° 02′ 25″ |
| Apparent magnitude | (mV) | 8.588 |
| Distance | 440 ly (135 pc) | |
| Mass | (m) | 1.079±0.051 M☉ |
| Radius | (r) | 1.243±0.019 R☉ |
| Temperature | (T) | 5793±74 K |
| Metallicity | [Fe/H] | 0.12±0.074 |
| Age | 6.3 ± 1.7 Gyr | |
| Physical characteristics | ||
| Mass | (m) | 5.79 M⊕ |
| Radius | (r) | 2.31±0.07 R⊕ |
| Density | (ρ) | 2.60±0.74 g cm−3 |
| Temperature | (T) | 1280 |
| Orbital elements | ||
| Semi-major axis | (a) | 0.06170 AU |
| Orbital period | (P) | 5.398763 d |
| Inclination | (i) | 87.60±0.9° |
| Discovery information | ||
| Discovery date | 12 February 2013 | |
| Discoverer(s) | ||
| Discovery method | Transit (Kepler Mission) | |
| Other detection methods | Radial velocity | |
| Discovery status | Confirmed | |
| Other designations | ||
| KOI 246.01
| ||
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).[2]
With a density of 2.6 g/cm3 it has physical characteristics of both a super-Earth and a mini-Neptune.[3]
See also
References
- ↑ Gilliland, Ronald L. "Kepler-68: Three Planets, One With a Density Between That of Earth and Ice Giants". Cornell University. Retrieved 28 February 2013.
- ↑ http://astro.berkeley.edu/~gmarcy/22kois.pdf
- ↑ Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets accessdate=8 January 2014
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