Kepler-42
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 likely also in mass.
Artist's impression of the Kepler-42 (KOI-961) system Credit: NASA | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 28m 52.5688s |
| 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: 93.126±0.073 mas/yr Dec.: −417.420±0.067 mas/yr |
| Parallax (π) | 24.9340 ± 0.0401 mas |
| Distance | 130.8 ± 0.2 ly (40.11 ± 0.06 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 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
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