Kepler-22
Star in the constellation Cygnus / From Wikipedia, the free encyclopedia
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″.[2] With an apparent visual magnitude of 11.7,[3] 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).[7] The estimated distance to Kepler-22 is 644 light-years (197 parsecs).[2]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus[1] |
Right ascension | 19h 16m 52.19023s[2] |
Declination | +47° 53′ 03.9486″[2] |
Apparent magnitude (V) | 11.664[3] |
Characteristics | |
Spectral type | G5V[4] |
Astrometry | |
Radial velocity (Rv) | −4.50±0.51[2] km/s |
Proper motion (μ) | RA: −39.589 mas/yr[2] Dec.: −66.773 mas/yr[2] |
Parallax (π) | 5.0627 ± 0.0110 mas[2] |
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[5] M☉ |
Radius | 0.869±0.011[5] R☉ |
Luminosity (bolometric) | 0.79 ± 0.04[3] L☉ |
Luminosity (visual, LV) | ~0.67 L☉ |
Temperature | 5596±61[5] K |
Metallicity [Fe/H] | −0.255±0.065[5] dex |
Rotational velocity (v sin i) | 0.6 ± 1.0[3] km/s |
Age | 7.0+4.0 −4.2[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
KIC | data |
Extrasolar Planets Encyclopaedia | data |
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