Astronomy:LHS 2090

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Coordinates: Sky map 09h 00m 23.594s, +21° 50′ 05.43″

LHS 2090
Observation data
Equinox J2000.0]] (ICRS)
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[4] mas/yr
Dec.: -592.253[4] mas/yr
Parallax (π)157.2686 ± 0.0535 mas
Distance20.739 ± 0.007 ly
(6.359 ± 0.002 pc)
Details
Mass0.09[5] M☉
Radius0.12[6] R☉
Luminosity0.00082[7] L☉
Temperature2680±24[7] K
Metallicity [Fe/H]-0.06±0.17[8] dex
Rotation0.439 d[6]
Rotational velocity (v sin i)15.0±1.0[6] km/s
Other designations
Gaia DR2 685103912857072640, LHS 2090, LP 368-128, NLTT 20726, 2MASS J09002359+2150054[9]
Database references
SIMBADdata
LHS 2090 is located in the constellation Cancer
LHS 2090 is located in the constellation Cancer
LHS 2090
Location of LHS 2090 in the constellation Cancer

LHS 2090 is a red dwarf star of spectral type M6.5V, located in constellation Cancer at 20.8 light-years from Earth.[10]

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

  1. ↑ 1.0 1.1 Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode: 2003yCat.2246....0C. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 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 
  3. ↑ 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. http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/12402/aa25803-15.pdf. 
  4. ↑ Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  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. 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. ↑ 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. ↑ 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. ↑ 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 
  9. ↑ "LHS 2090". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+2090. 
  10. ↑ 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". The Astronomical Journal 132 (6): 2360–2371. doi:10.1086/508233. Bibcode: 2006AJ....132.2360H. http://repositorio.uchile.cl/bitstream/2250/126230/1/Henry_Todd.pdf. 
  11. ↑ 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 



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