Kepler-22
Kepler-22 is a Sun-like 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 16m 52.2s, Declination +47° 53′ 3.9″. With an apparent visual magnitude of 11.7, this star is too faint to be seen with the naked eye. It can be viewed with a telescope having an aperture of at least 4 in (10 cm). The estimated distance to Kepler-22 is 644 light-years (197 parsecs).
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 16m 52.19023s |
| Declination | +47° 53′ 03.9486″ |
| Apparent magnitude (V) | 11.664 |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Radial velocity (Rv) | −4.50±0.51 km/s |
| Proper motion (μ) | RA: −39.589 mas/yr Dec.: −66.773 mas/yr |
| Parallax (π) | 5.0627 ± 0.0110 mas |
| Distance | 644 ± 1 ly (197.5 ± 0.4 pc) |
| Absolute magnitude (MV) | ~5.27 |
| Absolute bolometric magnitude (Mbol) | ~4.98 |
| Details | |
| Mass | 0.857+0.051 −0.043 M☉ |
| Radius | 0.869±0.011 R☉ |
| Luminosity (bolometric) | 0.79 ± 0.04 L☉ |
| Luminosity (visual, LV) | ~0.67 L☉ |
| Temperature | 5596±61 K |
| Metallicity [Fe/H] | −0.255±0.065 dex |
| Rotational velocity (v sin i) | 0.6 ± 1.0 km/s |
| Age | 7.0+4.0 −4.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| KIC | data |
| Extrasolar Planets Encyclopaedia | data |
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