GJ 1128
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina[1] |
| Right ascension | 09h 42m 46.3430s[2] |
| Declination | −68° 53′ 06.009″[2] |
| Apparent magnitude (V) | 12.78[3] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | M4.0V[4] |
| Astrometry | |
| Proper motion (μ) | RA: −75.828[2] mas/yr Dec.: +1128.849[2] mas/yr |
| Parallax (π) | 153.7593±0.0249 mas[2] |
| Distance | 21.212 ± 0.003 ly (6.504 ± 0.001 pc) |
| Absolute magnitude (MV) | 13.715[3] |
| Details | |
| Mass | 0.175[5] M☉ |
| Radius | 0.190[3] R☉ |
| Luminosity | 0.0043[6] L☉ |
| Surface gravity (log g) | 5.03[6] cgs |
| Temperature | 3,144[3] K |
| Metallicity [Fe/H] | 0.09[3] dex |
| Rotation | 157.4 days[7] |
| Other designations | |
| GJ 1128[8], L 100-115, LFT 680, LHS 271[9], LTT 3572, NLTT 22480[10], GSC 09209-00444, 2MASS J09424635-6853060, DENIS J094246.3-685309 | |
| Database references | |
| SIMBAD | data |
GJ 1128 is a star in the constellation Carina. It is somewhat nearby, located about 21.212 light-years away from Earth.
GJ 1128 is a red dwarf star with a mere 0.43% of the solar luminosity,[6] and an estimated mass 17.5% of the mass of the Sun.[5] It has 19% of the solar radius and its effective temperature is around 3,100 K, values comparable to the Barnard's Star.[3] It is a long-term variable with the prominent 5-year starspot cycle comparable to that of Sun's.[11]
The discovery designation of GJ 1128 is L 100-115,[12] from a 1944 catalogue of high-proper-motion stars.[13] It was then included in the 1979 Gliese–Jahreiss catalogue of nearby stars with an estimated parallax of 125 mas.[14] The small distance from Sun to the GJ 1128 was confirmed by later direct measurements of its parallax.[11]
See also
References
- ^ 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.
- ^ a b c d e 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.
- ^ a b c d e f g 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.
- ^ 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.
- ^ a b 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.
- ^ a b c 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.
- ^ Newton, Elisabeth R.; Mondrik, Nicholas; Irwin, Jonathan; Winters, Jennifer G.; Charbonneau, David (2018). "New Rotation Period Measurements for M Dwarfs in the Southern Hemisphere: An Abundance of Slowly Rotating, Fully Convective Stars". The Astronomical Journal. 156 (5): 217. arXiv:1807.09365. Bibcode:2018AJ....156..217N. doi:10.3847/1538-3881/aad73b.
- ^ Gliese, W.; Jahreiß, H. (1991). "GJ 1128". Preliminary Version of the Third Catalogue of Nearby Stars.
- ^ Luyten, Willem Jacob (1979). "LHS 271". LHS Catalogue, 2nd Edition.
- ^ Luyten, Willem Jacob (1979). "NLTT 22480". NLTT Catalogue.
- ^ a b 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.
- ^ 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.
- ^ "Dictionary of Nomenclature of Celestial Objects. L entry". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2025-07-01.
- ^ Gliese, W.; Jahreiß, H. (1979). "Nearby Star Data Published 1969-1978". Astronomy and Astrophysics Supplement Series. 38: 423. Bibcode:1979A&AS...38..423G.