LHS 288

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LHS 288
Carina constellation map.svg
Red pog.png
LHS 288
Location of LHS 288 in the constellation Carina

Observation data
Epoch J2000       Equinox J2000
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 mas/yr [2]
Dec.: +1,611.100 mas/yr [2]
Parallax (π)206.9698±0.0448  mas [2]
Distance 15.759 ± 0.003  ly
(4.832 ± 0.001  pc)
Absolute magnitude  (MV)15.5 [6]
Details
Mass 0.1085±0.0091 [7]   M☉
Radius 0.1256±0.0042 [7]   R☉
Luminosity (1.152±0.011)×10−3 [7]   L☉
Surface gravity (log g)5.10 [8]   cgs
Temperature 2,760±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
SIMBAD data

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 MJ 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. 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 "Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)".
  4. 1 2 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. S2CID   15002841.
  5. 1 2 3 4 5 "GJ 3618". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 3 Jun 2017.
  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. arXiv: 1905.07921 . Bibcode:2019AJ....158...56H. doi: 10.3847/1538-3881/ab23fe .
  7. 1 2 3 4 Cifuentes, C.; Caballero, J. A.; Cortés-Contreras, M.; Montes, D.; Abellán, F. J.; Dorda, R.; Holgado, G.; Zapatero Osorio, M. R.; Morales, J. C.; Amado, P. J.; Passegger, V. M.; Quirrenbach, A.; Reiners, A.; Ribas, I.; Sanz-Forcada, J. (2020-10-01). "CARMENES input catalogue of M dwarfs. V. Luminosities, colours, and spectral energy distributions". Astronomy and Astrophysics. 642: A115. arXiv: 2007.15077 . Bibcode:2020A&A...642A.115C. doi:10.1051/0004-6361/202038295. ISSN   0004-6361.
  8. ↑ Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A.; González Hernández, J. I.; Perger, M.; Pinamonti, M.; Scandariato, G.; Sozzetti, A.; Locci, D.; Di Maio, C.; Bignamini, A.; Claudi, R.; Molinari, E.; Rebolo, R.; Ribas, I.; Toledo-Padrón, B.; Covino, E.; Desidera, S.; Herrero, E.; Morales, J. C.; Suárez-Mascareño, A.; Pagano, I.; Petralia, A.; Piotto, G.; Poretti, E. (2020). "HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets". Astronomy and Astrophysics. 644: A68. arXiv: 2010.14867 . Bibcode:2020A&A...644A..68M. doi:10.1051/0004-6361/202039478.
  9. 1 2 3 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". Astronomy & Astrophysics. 568: A121. arXiv: 1406.6127 . doi:10.1051/0004-6361/201424139. ISSN   0004-6361.
  10. ↑ Kirkpatrick, J. Davy; Marocco, Federico; 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. arXiv: 2312.03639 . Bibcode:2024ApJS..271...55K. doi: 10.3847/1538-4365/ad24e2 .
  11. ↑ "Proxima Centauri". SIMBAD . Centre de données astronomiques de Strasbourg.
  12. ↑ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. Archived from the original on 2013-12-03. 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. Bibcode:2009PASP..121..365B. doi: 10.1086/599044 .
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