Kepler-33
Kepler-33 is a star about 4,000 light-years (1,200 parsecs) in the constellation of Cygnus, with a system of five known planets. Having just begun to evolve off from the main sequence, its radius and mass are difficult to ascertain, although data available in 2020 shows its best-fit mass of 1.3M☉ and radius of 1.6R☉ are compatible with a model of a subgiant star.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 16m 18.6100s |
| Declination | +46° 00′ 18.814″ |
| Apparent magnitude (V) | 13.988 |
| Characteristics | |
| Spectral type | G1IV |
| Astrometry | |
| Radial velocity (Rv) | 12.18±3.65 km/s |
| Proper motion (μ) | RA: −1.107(15) mas/yr Dec.: −13.099(14) mas/yr |
| Parallax (π) | 0.8136 ± 0.0118 mas |
| Distance | 4,010 ± 60 ly (1,230 ± 20 pc) |
| Details | |
| Mass | 1.26+0.03 −0.06 M☉ |
| Radius | 1.66±0.03 R☉ |
| Luminosity | 3.1+0.2 −0.1 L☉ |
| Temperature | 5947±60 K |
| Metallicity [Fe/H] | 0.14±0.04 dex |
| Age | 4.2+1.3 −0.3 Gyr |
| Other designations | |
KOI-707, KIC 9458613, 2MASS J19161861+4600187, Gaia DR2 2127355923723254272 | |
| Database references | |
| SIMBAD | data |
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