GJ 1062

GJ 1062
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Eridanus
Right ascension 03h 38m 15.69799s
Declination −11° 29′ 13.5050″
Apparent magnitude (V) +13.010
Characteristics
Spectral type d/sdM2
U−B color index +1.385
B−V color index +1.605
R−I color index 1.184
Astrometry
Radial velocity (Rv)−84.88±0.56 km/s
Proper motion (μ) RA: 1,458.201 mas/yr
Dec.: −2,696.545 mas/yr
Parallax (π)61.8861±0.0220 mas
Distance52.70 ± 0.02 ly
(16.159 ± 0.006 pc)
Absolute magnitude (MV)10.608
Details
Mass0.255 M☉
Radius0.411±0.051 R☉
0.372±0.076 R☉
0.202±0.012 R☉
Luminosity0.0055 L☉
Temperature3,488±50 K
Metallicity [Fe/H]−0.28±0.15 dex
Rotational velocity (v sin i)9.80 km/s
Other designations
GJ 1062, LHS 20, LTT 1717, Ross 578, 2MASS J03381558−1129102
Database references
SIMBADdata
ARICNSdata

GJ 1062 is a single red dwarf in the constellation Eridanus, positioned about two degrees to the SSE of Epsilon Eridani. It is also known as LHS 20 and Ross 578. The star is invisible to the naked eye with an apparent visual magnitude of +13.0, requiring a telescope with at least a 25 cm (10 in) aperture to view. It is located at a distance of 52.7 light years (16.1 parsecs) from the Sun based on parallax, but is drifting closer with a radial velocity of −85 km/s. The star has a high proper motion, traversing the sky at the rate of 3.033 arcseconds per year.

This is an M-type subdwarf star with a stellar classification of d/sdM2. It was one of the first three subdwarfs to be definitively identified by G. Kuiper in 1940, the other two being Kapteyn's Star and Wolf 1106. GJ 1062 is considered a likely member of the halo population, and thus is a MACHO.

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 7 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 3 4 5 6 7 Houdebine, E. R. (2010). "Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars". Monthly Notices of the Royal Astronomical Society. 407 (3): 1657. Bibcode:2010MNRAS.407.1657H. doi:10.1111/j.1365-2966.2010.16827.x.
  4. 1 2 Kesseli, Aurora Y.; Kirkpatrick, J. Davy; Fajardo-Acosta, Sergio B.; Penny, Matthew T.; Gaudi, B. Scott; Veyette, Mark; Boeshaar, Patricia C.; Henderson, Calen B.; Cushing, Michael C.; Calchi-Novati, Sebastiano; Shvartzvald, Y.; Muirhead, Philip S. (2019). "Radii of 88 M Subdwarfs and Updated Radius Relations for Low-metallicity M-dwarf Stars". The Astronomical Journal. 157 (2): 63. arXiv:1810.07702. Bibcode:2019AJ....157...63K. doi:10.3847/1538-3881/aae982.
  5. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  6. 1 2 Houdebine, E. R.; et al. (May 2016). "Rotation-Activity Correlations in K and M Dwarfs. I. Stellar Parameters and Compilations of v sin I and P/sin I for a Large Sample of Late-K and M Dwarfs". The Astrophysical Journal. 822 (2): 38. arXiv:1604.07920. Bibcode:2016ApJ...822...97H. doi:10.3847/0004-637X/822/2/97. S2CID 119118088. 97.
  7. 1 2 Winters, Jennifer G.; et al. (June 2019). "The Solar Neighborhood. XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc". The Astronomical Journal. 157 (6): 32. arXiv:1901.06364. Bibcode:2019AJ....157..216W. doi:10.3847/1538-3881/ab05dc. S2CID 86859146. 216.
  8. 1 2 Kesseli, Aurora Y.; et al. (February 2019). "Radii of 88 M Subdwarfs and Updated Radius Relations for Low-metallicity M-dwarf Stars". The Astronomical Journal. 157 (2): 17. arXiv:1810.07702. Bibcode:2019AJ....157...63K. doi:10.3847/1538-3881/aae982. S2CID 119325209. 63.
  9. ↑ "GJ 1062". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 December 2016.
  10. ↑ Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. Vol. 1. Sky Publishing Corporation and the European Space Agency. p. 308. ISBN 0-933346-84-0.
  11. ↑ "The astronomical magnitude scale". International Comet Quarterly. Retrieved 2020-12-31.
  12. ↑ Luyten, W. J. (June 1995). "NLTT Catalogue". VizieR Online Data Catalog. Bibcode:1995yCat.1098....0L.
  13. ↑ Kotoneva, E.; et al. (August 2005). "A study of Kapteyn's star". Astronomy and Astrophysics. 438 (3): 957–962. Bibcode:2005A&A...438..957K. doi:10.1051/0004-6361:20042287.
  14. ↑ Fuchs, B.; Jahreiß, H. (January 1998). "Halo stars in the immediate solar neighbourhood". Astronomy and Astrophysics. 329: 81. arXiv:astro-ph/9708209. Bibcode:1998A&A...329...81F.