Kepler-27
A diagram of the Kepler-31 System, compared to our Inner Solar System. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 28m 56.825s |
| Declination | +41° 05′ 09.15″ |
| Apparent magnitude (V) | 15.855[2] |
| Characteristics | |
| Spectral type | G5[3] |
| Astrometry | |
| Distance | 2638[3] ly (809 pc) |
| Details | |
| Mass | 0.65[2] M☉ |
| Radius | [2] R☉ |
| Luminosity | 0.59[2] L☉ |
| Temperature | 5400[2] K |
| Metallicity [Fe/H] | 0.41[2] dex |
| Rotational velocity (v sin i) | 0.6[2] km/s |
| Other designations | |
Kepler-2 is a star in the northern constellation of Cygnus, the swan, that is orbited by a planet found to be unequivocally within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 19h 28m 56.825s}, Declination +41° 05′ 09.15″.[4] With an apparent visual magnitude of 15.855,[2] this star is too faint to be seen with the naked eye.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 9.11 MJ | 0.118 | 15.3348 | — | — | — |
| c | 13.8 MJ | 0.191 | 31.3309 | — | — | 4.1 R🜨 |
References
- ^ "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
- ^ a b c d e f g h Kepler-31b, NASA Ames Research Center, retrieved 2011-12-06
- ^ a b c Schneider, Jean, "Star: Kepler-31", Extrasolar Planets Encyclopaedia, Paris Observatory, retrieved 2011-12-06
- ^ "Kepler Discoveries". 2011-12-05.