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From Wikipedia, the free encyclopedia
LHS 2090 is a red dwarf star of spectral type M6.5V, located in constellation Cancer at 20.8 light-years from Earth.[10]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cancer |
Right ascension | 09h 00m 23.594s[1] |
Declination | +21° 50′ 05.43″[1] |
Apparent magnitude (V) | 16.11[2] |
Characteristics | |
Evolutionary stage | Main-sequence star[2] |
Spectral type | M6.5 V[3] |
Apparent magnitude (J) | 9.44[2] |
Astrometry | |
Radial velocity (Rv) | 23.3[2] km/s |
Proper motion (μ) | RA: -514.942 mas/yr[4] Dec.: -592.253 mas/yr[4] |
Parallax (π) | 157.2686 ± 0.0535 mas |
Distance | 20.739 ± 0.007 ly (6.359 ± 0.002 pc) |
Details | |
Mass | 0.09[5] M☉ |
Radius | 0.12[6] R☉ |
Luminosity | 0.00082[7] L☉ |
Temperature | 2680±24[7] K |
Metallicity [Fe/H] | -0.06±0.17[8] dex |
Rotation | 0.439 d[6] |
Rotational velocity (v sin i) | 15.0±1.0[6] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Location of LHS 2090 in the constellation Cancer |
The star was identified to be a red dwarf at short distance (6 parsecs from Sun) in 2001.[11] As typical for very cool red dwarfs, its spectrum is dominated by molecular water absorption. Stellar metallicity is similar to that of Sun`s.[8]
Radial velocity measurements did not yield any detection of stellar companion or giant planet on orbit around LHS 2090, as in 2018.[2]
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