GJ 1128

GJ 1128 is a red dwarf star of spectral type M4.0V, located in constellation Carina 21 light-years away from Earth. It is one of the closer stars to the Sun.

GJ 1128
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 09h 42m 46.3420s[1]
Declination −68° 53′ 06.004″[1]
Apparent magnitude (V) 12.78[2]
Characteristics
Spectral type M4.0V[3]
Astrometry
Proper motion (μ) RA: −75.523[1] mas/yr
Dec.: 1128.513[1] mas/yr
Parallax (π)153.7593 ± 0.0249 mas[4]
Distance21.212 ± 0.003 ly
(6.504 ± 0.001 pc)
Absolute magnitude (MV)13.715[2]
Details
Mass0.175[5] M☉
Radius0.190[2] R☉
Luminosity0.0043[6] L☉
Surface gravity (log g)5.03[6] cgs
Temperature3144[2] K
Metallicity [Fe/H]0.09[2] dex
Other designations
GJ 1128[7], L 100-115, LFT 680, LHS 271[8], LTT 3572, NLTT 22480[9], GSC 09209-00444, 2MASS J09424635-6853060, DENIS J094246.3-685309
Database references
SIMBADdata

History of observations

The discovery designation of GJ 1128 is L 100-115,[10] related to time period 1942–1944.[11] The small distance from Sun to the GJ 1128 was recognized in 2005.[12]

Physical properties

GJ 1128 is a long-term variable with the prominent 5-year starspot cycle comparable to that of Sun`s.[12]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. 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. S2CID 159041104.
  3. Lurie, John C.; Henry, Todd J.; Jao, Wei-Chun; Quinn, Samuel N.; Winters, Jennifer G.; Ianna, Philip A.; Koerner, David W.; Riedel, Adric R.; Subasavage, John P. (2014). "The Solar Neighborhood. XXXIV. a Search for Planets Orbiting Nearby M Dwarfs Using Astrometry". The Astronomical Journal. 148 (5): 91. arXiv:1407.4820. Bibcode:2014AJ....148...91L. doi:10.1088/0004-6256/148/5/91. S2CID 118492541.
  4. 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. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  5. Klüter, J.; Bastian, U.; Wambsganss, J. (2020). "Expectations on mass determination using astrometric microlensing by Gaia". Astronomy and Astrophysics. 640: A83. arXiv:1911.02584. Bibcode:2020A&A...640A..83K. doi:10.1051/0004-6361/201937061. S2CID 207847416.
  6. Stassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; Paegert, Martin; De Lee, Nathan; Torres, Guillermo; Latham, David W.; Charpinet, Stéphane; Dressing, Courtney D.; Huber, Daniel; Kane, Stephen R.; Lépine, Sébastien; Mann, Andrew; Muirhead, Philip S.; Rojas-Ayala, Bárbara; Silvotti, Roberto; Fleming, Scott W.; Levine, Al; Plavchan, Peter; the TESS Target Selection Working Group (2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. S2CID 73582386.
  7. Gliese, W.; Jahreiß, H. (1991). "GJ 1128". Preliminary Version of the Third Catalogue of Nearby Stars.
  8. Luyten, Willem Jacob (1979). "LHS 271". LHS Catalogue, 2nd Edition.
  9. Luyten, Willem Jacob (1979). "NLTT 22480". NLTT Catalogue.
  10. Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2): 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. S2CID 119279752.
  11. Dictionary of Nomenclature of Celestial Objects. L entry. SIMBAD. Centre de Données astronomiques de Strasbourg.
  12. 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.


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