Astronomy:LHS 2090
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Short description: Red dwarf
Coordinates: 
09h 00m 23.594s, +21° 50′ 05.43″
  LHS 2090 Location of LHS 2090 in the constellation Cancer | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer[1] |
| Right ascension | 09h 00m 23.546s[2] |
| Declination | +21° 50′ 04.90″[2] |
| Apparent magnitude (V) | 16.11[3] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | M6.5 V[4] |
| Apparent magnitude (J) | 9.44[3] |
| Astrometry | |
| Radial velocity (Rv) | +23.3[3] km/s |
| Proper motion (μ) | RA: −514.942[2] mas/yr Dec.: −592.253[2] mas/yr |
| Parallax (π) | 157.2686 ± 0.0535[2] 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 |
LHS 2090 is a red dwarf star of spectral type M6.5V, located in constellation Cancer at 20.74 light-years from Earth.[2]
The star was identified to be a nearby red dwarf (6 parsecs from Sun) in 2001,[10] and its parallax was first measured in 2006.[11] As typical for very cool red dwarfs, its spectrum is dominated by molecular water absorption. The stellar metallicity is similar to that of the Sun.[8]
Radial velocity measurements did not yield any detection of a stellar companion or giant planet in orbit around LHS 2090, as of 2018.[3]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L. et al. (2018). "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs". The Astronomical Journal 155 (6): 265. doi:10.3847/1538-3881/aac262. Bibcode: 2018AJ....155..265H.
- ↑ Alonso-Floriano, F. J.; Morales, J. C.; Caballero, J. A.; Montes, D.; Klutsch, A.; Mundt, R.; Cortés-Contreras, M.; Ribas, I. et al. (2015). "CARMENES input catalogue of M dwarfs". Astronomy & Astrophysics 577: A128. doi:10.1051/0004-6361/201525803. Bibcode: 2015A&A...577A.128A.
- ↑ Davison, Cassy L.; White, R. J.; Henry, T. J.; Riedel, A. R.; Jao, W-C.; Bailey Iii, J. I.; Quinn, S. N.; Cantrell, J. R. et al. (2015). "A 3D Search for Companions to 12 Nearby M Dwarfs". The Astronomical Journal 149 (3): 106. doi:10.1088/0004-6256/149/3/106. Bibcode: 2015AJ....149..106D.
- ↑ 6.0 6.1 6.2 Fouqué, Pascal et al. (April 2018). "SPIRou Input Catalogue: global properties of 440 M dwarfs observed with ESPaDOnS at CFHT". Monthly Notices of the Royal Astronomical Society 475 (2): 1960–1986. doi:10.1093/mnras/stx3246. Bibcode: 2018MNRAS.475.1960F.
- ↑ 7.0 7.1 Dieterich, Sergio B.; Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Hosey, Altonio D.; Riedel, Adric R.; Subasavage, John P. (2013). "The Solar Neighborhood. Xxxii. The Hydrogen Burning Limit". The Astronomical Journal 147 (5): 94. doi:10.1088/0004-6256/147/5/94.
- ↑ 8.0 8.1 Rojas-Ayala, Bárbara; Covey, Kevin R.; Muirhead, Philip S.; Lloyd, James P. (2011). "Metallicity and Temperature Indicators in M Dwarfk-Band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal 748 (2): 93. doi:10.1088/0004-637X/748/2/93.
- ↑ "LHS 2090". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+2090.
- ↑ Scholz, R.-D.; Meusinger, H.; Jahreiß, H. (2001). "Search for nearby stars among proper motion stars selected by optical-to-infrared photometry". Astronomy & Astrophysics 374 (2): L12–L15. doi:10.1051/0004-6361:20010811.
- ↑ Henry, Todd J.; Jao, Wei-Chun; Subasavage, John P.; Beaulieu, Thomas D.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. (2006). "The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the RECONS 10 Parsec Sample". The Astronomical Journal 132 (6): 2360. doi:10.1086/508233. Bibcode: 2006AJ....132.2360H.
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