LHS 2090
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[4] |
| 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 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]
References
- Cutri, R. M.; et al. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
- The Solar Neighborhood XLIV: RECONS Discoveries within 10 Parsecs, 2018, arXiv:1804.07377
- Alonso-Floriano, F. J.; Morales, J. C.; Caballero, J. A.; Montes, D.; Klutsch, A.; Mundt, R.; Cortés-Contreras, M.; Ribas, I.; Reiners, Ansgar; Amado, P. J.; Quirrenbach, A.; Jeffers, S. V. (2015). "CARMENES input catalogue of M dwarfs" (PDF). Astronomy & Astrophysics. 577: A128. arXiv:1502.07580. doi:10.1051/0004-6361/201525803. S2CID 53135130.
- Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
- A 3D search for companions to 12 nearby M dwarfs, 2015, arXiv:1501.05012
- 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, arXiv:1712.04490, Bibcode:2018MNRAS.475.1960F, doi:10.1093/mnras/stx3246.
- The solar neighborhood. XXXII. The hydrogen burning limit, 2013, arXiv:1312.1736
- Metallicity and temperature indicators in M dwarf K-band spectra: testing new and updated calibrations with observations of 133 solar neighborhood M dwarfs, 2011, arXiv:1112.4567
- "LHS 2090". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 January 2018.
- Henry, T. 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" (PDF). The Astronomical Journal. 132 (6): 2360–2371. arXiv:astro-ph/0608230. Bibcode:2006AJ....132.2360H. doi:10.1086/508233.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Search for nearby stars among proper motion stars selected by optical-to-infrared photometry I. Discovery of LHS 2090 at spectroscopic distance of d ∼ 6 pc, 2001, arXiv:astro-ph/0106222
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