Kepler-31
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 36m 05.523s |
| Declination | +45° 51′ 11.09″ |
| Apparent magnitude (V) | [2] |
| Characteristics | |
| Spectral type | G5[3] |
| Astrometry | |
| Distance | 15237[3] ly |
| Details | |
| Mass | 1,21±017[2] M☉ |
| Radius | 1.22±0.24[2] R☉ |
| Luminosity | 0.79 ± 0.04[2] L☉ |
| Temperature | 6340±200[2] K |
| Metallicity [Fe/H] | –0.076±0.400[2] dex |
| Rotational velocity (v sin i) | [2] km/s |
| Other designations | |
Kepler-31 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 36m 05.523s}, Declination +45° 51′ 11.09″.[4] With an apparent visual magnitude of 14.0,[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 | 6.8 MJ | 0.16 | 20.8613 | — | — | 4.1 R⊕ |
| c | 4.7 MJ | 0.26 | 42.6318 | — | — | 4.1 R⊕ |
References
- ↑ "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
- 1 2 3 4 5 6 7 8 Kepler-31b, NASA Ames Research Center, retrieved 2011-12-06
- 1 2 3 Schneider, Jean, "Star: Kepler-23", Extrasolar Planets Encyclopaedia (Paris Observatory), retrieved 2011-12-06
- ↑ "Kepler Discoveries". 2011-12-05.
Coordinates: 
19h 36m 05.523s, +45° 51′ 11.09″
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