Kepler-27
Kepler-27 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 56.8195s, Declination +41° 05′ 09.141″.[2] With an apparent visual magnitude of 15.855,[3] 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⊕ |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 28m 56.8195s[2] |
| Declination | +41° 05′ 09.141″[2] |
| Apparent magnitude (V) | 15.855[3] |
| Characteristics | |
| Spectral type | G5[4] |
| Astrometry | |
| Proper motion (μ) | RA: 2.250±0.065[2] mas/yr Dec.: −0.326±0.060[2] mas/yr |
| Parallax (π) | 0.9301 ± 0.0360[2] mas |
| Distance | 3,500 ± 100 ly (1,080 ± 40 pc) |
| Details | |
| Mass | 0.65[3] M☉ |
| Radius | [3] R☉ |
| Luminosity | 0.59[3] L☉ |
| Temperature | 5400[3] K |
| Metallicity [Fe/H] | 0.41[3] dex |
| Rotational velocity (v sin i) | 0.6[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
References
- "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Kepler-31b, NASA Ames Research Center, retrieved 2011-12-06
- Schneider, Jean, "Star: Kepler-31", Extrasolar Planets Encyclopaedia, Paris Observatory, archived from the original on 2012-04-26, retrieved 2011-12-06
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