LHS 2090

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LHS 2090
Cancer constellation map.svg
Red pog.png
LHS 2090
Location of LHS 2090 in the constellation Cancer

Observation data
Epoch J2000.0        Equinox J2000.0
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 mas/yr [2]
Dec.: −592.253 mas/yr [2]
Parallax (π)157.2686±0.0535  mas [2]
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
LHS 2090, LP 368-128, NLTT 20726, 2MASS J09002359+2150054 [9]
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

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley (2018). "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs". The Astronomical Journal. 155 (6): 265. arXiv: 1804.07377 . Bibcode:2018AJ....155..265H. doi: 10.3847/1538-3881/aac262 . S2CID   53983430.
  4. ↑ 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". Astronomy & Astrophysics. 577: A128. arXiv: 1502.07580 . Bibcode:2015A&A...577A.128A. doi:10.1051/0004-6361/201525803. S2CID   53135130.
  5. ↑ 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.; Subasavage, J. P.; Winters, J. G. (2015). "A 3D Search for Companions to 12 Nearby M Dwarfs". The Astronomical Journal. 149 (3): 106. arXiv: 1501.05012 . Bibcode:2015AJ....149..106D. doi:10.1088/0004-6256/149/3/106. S2CID   9719725.
  6. 1 2 3 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 .
  7. 1 2 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. arXiv: 1312.1736 . doi:10.1088/0004-6256/147/5/94. S2CID   21036959.
  8. 1 2 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. arXiv: 1112.4567 . doi:10.1088/0004-637X/748/2/93. S2CID   41902340.
  9. ↑ "LHS 2090". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 29 January 2018.
  10. ↑ 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. arXiv: astro-ph/0106222 . doi:10.1051/0004-6361:20010811. S2CID   8488435.
  11. ↑ 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. arXiv: astro-ph/0608230 . Bibcode:2006AJ....132.2360H. doi:10.1086/508233.


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