Astronomy:LHS 288

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Short description: Red dwarf star in the constellation Carina

Coordinates: Sky map 10h 44m 21.320s, −61° 12′ 35.44″

LHS 288
LHS 288 is located in the constellation Carina.
LHS 288 is located in the constellation Carina.
LHS 288
Location of LHS 288 in the constellation Carina

Observation data
Equinox J2000.0]] (ICRS)
Constellation Carina[1]
Right ascension  10h 44m 21.23291s[2]
Declination −61° 12′ 35.2754″[2]
Apparent magnitude (V) 13.92[3]
Characteristics
Spectral type M5V[4]
B−V color index 1.82[3]
V−R color index 1.59[5]
R−I color index 2.02[5]
J−H color index 0.442[5]
J−K color index 0.764[5]
Astrometry
Radial velocity (Rv)155.61±1.27[2] km/s
Proper motion (μ) RA: −346.208[2] mas/yr
Dec.: +1,611.100[2] mas/yr
Parallax (π)206.9698 ± 0.0448[2] mas
Distance15.759 ± 0.003 ly
(4.832 ± 0.001 pc)
Absolute magnitude (MV)15.5[6]
Details
Mass0.1085±0.0091[7] M☉
Radius0.1256±0.0042[7] R☉
Luminosity(1.152±0.011)×10−3[7] L☉
Surface gravity (log g)5.10[8] cgs
Temperature2,760±150[9] K
Metallicity [Fe/H]−0.55±0.20[9] dex
Other designations
GJ 3618, L 143-23, LFT 734, LHS 288, LTT 3946, PLX 2511.01[5]
Database references
SIMBADdata

LHS 288 (Luyten 143-23) is a red dwarf star in the constellation Carina. At a distance of 15.759 light-years, it is among the nearest stars, and is the closest in the constellation.[10] Despite its distance, the star is far too faint to be seen with the unaided eye, with an apparent magnitude of 13.92.

The spectrum of this star matches a spectral class of M5V,[4] similar to the class of Proxima Centauri.[11] This star has an estimated 0.109 times the Sun's mass, 0.126 times the Sun's radius, and just 1.15% of the solar luminosity.[7] At an effective temperature of 2,760±150 K,[9] it radiates a reddish hue.[12]

A 2007 study suggested that LHS 288 may harbour a planet with a mass of 2.4 |♃|J}}}}}} based on astrometric observations, but the possibility that it passed over an undetected faint star, which could mimic the astrometric variation caused by a planet, could not be eliminated.[13]

References

  1. ↑ 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. ↑ 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. ↑ 3.0 3.1 "Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)". http://vizier.u-strasbg.fr/viz-bin/VizieR-S?GJ%20%203618. 
  4. ↑ 4.0 4.1 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. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 "GJ 3618". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+3618. 
  6. ↑ Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. (2019). "The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs". The Astronomical Journal 158 (2): 56. doi:10.3847/1538-3881/ab23fe. Bibcode: 2019AJ....158...56H. 
  7. ↑ 7.0 7.1 7.2 7.3 Cifuentes, C.; Caballero, J. A.; Cortés-Contreras, M.; Montes, D.; Abellán, F. J.; Dorda, R.; Holgado, G.; Zapatero Osorio, M. R. et al. (2020-10-01). "CARMENES input catalogue of M dwarfs. V. Luminosities, colours, and spectral energy distributions". Astronomy and Astrophysics 642: A115. doi:10.1051/0004-6361/202038295. ISSN 0004-6361. Bibcode: 2020A&A...642A.115C. 
  8. ↑ Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A. et al. (2020). "HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets". Astronomy and Astrophysics 644: A68. doi:10.1051/0004-6361/202039478. Bibcode: 2020A&A...644A..68M. 
  9. ↑ 9.0 9.1 9.2 Neves, V.; Bonfils, X.; Santos, N. C.; Delfosse, X.; Forveille, T.; Allard, F.; Udry, S. (2014-08-01). "Metallicity of M dwarfs - IV. A high-precision [Fe/H] and Teff technique from high-resolution optical spectra for M dwarfs" (in en). Astronomy & Astrophysics 568: A121. doi:10.1051/0004-6361/201424139. ISSN 0004-6361. 
  10. ↑ Kirkpatrick, J. Davy et al. (April 2024). "The Initial Mass Function Based on the Full-sky 20 pc Census of ~3600 Stars and Brown Dwarfs". The Astrophysical Journal Supplement Series 271 (2): 55. doi:10.3847/1538-4365/ad24e2. Bibcode: 2024ApJS..271...55K. 
  11. ↑ "Proxima Centauri". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Proxima+Centauri. 
  12. ↑ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html. Retrieved 2012-01-16. 
  13. ↑ Bartlett, Jennifer L.; Ianna, Philip A.; Begam, Michael C. (April 2009). "A Search for Astrometric Companions to Stars in the Southern Hemisphere". Publications of the Astronomical Society of the Pacific 121 (878): 365. doi:10.1086/599044. Bibcode: 2009PASP..121..365B. 



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