Kepler-39
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 47m 50.4746s |
| Declination | +46° 02′ 03.500″ |
| Apparent magnitude (V) | 14.3 |
| Characteristics | |
| Spectral type | F7V |
| Astrometry | |
| Proper motion (μ) | RA: 3.894(18) mas/yr Dec.: −2.345(17) mas/yr |
| Parallax (π) | 0.9316±0.0139 mas |
| Distance | 3,500 ± 50 ly (1,070 ± 20 pc) |
| Details | |
| Mass | 1.29+0.06 −0.07 M☉ |
| Radius | 1.40±0.10 R☉ |
| Surface gravity (log g) | 4.25±0.06 cgs |
| Temperature | 6350±100 K |
| Metallicity [Fe/H] | 0.10±0.14 dex |
| Rotation | 4.464±0.013 days |
| Rotational velocity (v sin i) | 16±2.5 km/s |
| Age | 2.1+0.8 −0.9 Gyr |
| Other designations | |
| KOI-423, KIC 9478990, Gaia DR2 2080168561154800384, 2MASS J19475046+4602034 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-39 (2MASS J19475046+4602034) is an F-type main sequence star located in the constellation Cygnus. It is located about 3,500 light-years (1,070 parsecs) away. One known substellar companion orbits it, Kepler-39b.