LP 890-9
Red dwarf star with Earth-like planet / From Wikipedia, the free encyclopedia
LP 890-9, also known as SPECULOOS-2 or TOI-4306, is a high proper motion red dwarf star located 105 light-years (32 pc) away from the Solar System in the constellation of Eridanus. The star has 12% the mass and 15% the radius of the Sun, and a temperature of 2,871 K (2,598 °C; 4,708 °F). It is extremely faint and, with an apparent magnitude of 18, is the faintest star with exoplanets discovered by the Transiting Exoplanet Survey Satellite.[6]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Eridanus[1] |
Right ascension | 04h 16m 31.16176s[2] |
Declination | −28° 18′ 52.9543″[2] |
Apparent magnitude (V) | 18.0±0.2[3] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | M6V[4] |
Apparent magnitude (V) | 18.0±0.2[3] |
Apparent magnitude (G) | 15.791±0.003[2] |
Apparent magnitude (J) | 12.258±0.023[3] |
Apparent magnitude (H) | 11.692±0.025[3] |
Apparent magnitude (K) | 11.344±0.023[3] |
Astrometry | |
Radial velocity (Rv) | 28.84±2.84[2] km/s |
Proper motion (μ) | RA: 218.569 mas/yr[2] Dec.: −251.145 mas/yr[2] |
Parallax (π) | 30.9326 ± 0.0418 mas[2] |
Distance | 105.4 ± 0.1 ly (32.33 ± 0.04 pc) |
Absolute magnitude (MV) | 15.45±0.2[note 1] |
Details[3] | |
Mass | 0.118±0.002 M☉ |
Radius | 0.1532+0.0048 −0.0024 R☉ |
Luminosity (bolometric) | 0.001438±0.000037 L☉ |
Surface gravity (log g) | 5.139+0.013 −0.028 cgs |
Temperature | 2871+32 −45 K |
Metallicity [Fe/H] | −0.028±0.089 dex |
Age | 7.2+2.2 −3.1 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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