 Artist's impression of the Kepler-42 (KOI-961) system Credit: NASA | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 28m 52.5689s[1] |
| Declination | 44° 37′ 08.990″[1] |
| Apparent magnitude (V) | 16.12[2] |
| Characteristics | |
| Spectral type | M5V[3] |
| Astrometry | |
| Radial velocity (Rv) | −84.48±0.2[3] km/s |
| Proper motion (μ) | RA: 93.074(24) mas/yr[1] Dec.: −417.393(25) mas/yr[1] |
| Parallax (π) | 24.9338 ± 0.0204 mas[1] |
| Distance | 130.8 ± 0.1 ly (40.11 ± 0.03 pc) |
| Details | |
| Mass | 0.144+0.007 −0.006[4] M☉ |
| Radius | 0.175±0.006[4] R☉ |
| Luminosity | 3.08±0.28x10−3.0[4] L☉ |
| Temperature | 3269±19[4] K |
| Metallicity [Fe/H] | −0.48±0.17[3] dex |
| Rotational velocity (v sin i) | 2.9±0.4[3] km/s |
| Other designations | |
| 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.[5]
- ^ a b c d Cite error: The named reference
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Exoplanet.euwas invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
Muirheadwas invoked but never defined (see the help page). - ^ a b c d Mann, Andrew W.; Dupuy, Trent; Muirhead, Philip S.; Johnson, Marshall C.; Liu, Michael C.; Ansdell, Megan; Dalba, Paul A.; Swift, Jonathan J.; Hadden, Sam (2017), "THE GOLD STANDARD: ACCURATE STELLAR AND PLANETARY PARAMETERS FOR EIGHT Kepler M DWARF SYSTEMS ENABLED BY PARALLAXES", The Astronomical Journal, 153 (6): 267, arXiv:1705.01545, Bibcode:2017AJ....153..267M, doi:10.3847/1538-3881/aa7140, S2CID 119325474
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