Kepler-42
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 28m 52.5689s |
| Declination | 44° 37′ 08.990″ |
| Apparent magnitude (V) | 16.12 |
| Characteristics | |
| Spectral type | M5V |
| Astrometry | |
| Radial velocity (Rv) | −84.48±0.2 km/s |
| Proper motion (μ) | RA: 93.074(24) mas/yr Dec.: −417.393(25) mas/yr |
| Parallax (π) | 24.9338±0.0204 mas |
| Distance | 130.8 ± 0.1 ly (40.11 ± 0.03 pc) |
| Details | |
| Mass | 0.144+0.007 −0.006 M☉ |
| Radius | 0.175±0.006 R☉ |
| Luminosity | 3.08±0.28x10−3.0 L☉ |
| Temperature | 3269±19 K |
| Metallicity [Fe/H] | −0.48±0.17 dex |
| Rotational velocity (v sin i) | 2.9±0.4 km/s |
| Other designations | |
| 2MASS J19285255+4437096, KIC 8561063, LSPM J1928+4437, Gaia DR2 2126556132093765888, KOI-961 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-42, formerly known as KOI-961, is a red dwarf located in the constellation Cygnus and approximately 131 light years from the Sun. It has three known extrasolar planets, all of which are smaller than Earth in radius and orbit very close to the star.