Astronomy:GJ 1062

From HandWiki
Short description: Star in the constellation Eridanus
GJ 1062
Observation data
Equinox J2000.0]] (ICRS)
Constellation Eridanus[1]
Right ascension  03h 38m 15.69799s[2]
Declination −11° 29′ 13.5050″[2]
Apparent magnitude (V) +13.010[3]
Characteristics
Spectral type d/sdM2[4]
U−B color index +1.385[5]
B−V color index +1.605[5]
R−I color index 1.184[3]
Astrometry
Radial velocity (Rv)−84.88±0.56[2] km/s
Proper motion (μ) RA: 1,458.201[2] mas/yr
Dec.: −2,696.545[2] mas/yr
Parallax (π)61.8861 ± 0.0220[2] mas
Distance52.70 ± 0.02 ly
(16.159 ± 0.006 pc)
Absolute magnitude (MV)10.608[6]
Details
Mass0.255[7] M☉
Radius0.411±0.051 R☉[3]
0.372±0.076 R☉[6]
0.202±0.012[8] R☉
Luminosity0.0055[3] L☉
Temperature3,488±50[3] K
Metallicity [Fe/H]−0.28±0.15[8] dex
Rotational velocity (v sin i)9.80[3] km/s
Other designations
GJ 1062, LHS 20, LTT 1717, Ross 578, 2MASS J03381558−1129102[9]
Database references
SIMBADdata
ARICNSdata

GJ 1062 is a single[7] red dwarf star in the constellation Eridanus, positioned about two degrees to the SSE of Epsilon Eridani.[10] 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,[3] requiring a telescope with at least a 25 cm (10 in) aperture to view.[11] It is located at a distance of 52.7 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −85 km/s.[2] The star has a high proper motion, traversing the sky at the rate of 3.033 arcseconds per year.[12]

This is an M-type subdwarf star with a stellar classification of d/sdM2.[4] 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.[13] GJ 1062 is considered a likely member of the halo population, and thus is a MACHO.[14]

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 2.5 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 3.2 3.3 3.4 3.5 3.6 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. doi:10.1111/j.1365-2966.2010.16827.x. Bibcode: 2010MNRAS.407.1657H. 
  4. ↑ 4.0 4.1 Kesseli, Aurora Y.; Kirkpatrick, J. Davy; Fajardo-Acosta, Sergio B.; Penny, Matthew T.; Gaudi, B. Scott; Veyette, Mark; Boeshaar, Patricia C.; Henderson, Calen B. et al. (2019). "Radii of 88 M Subdwarfs and Updated Radius Relations for Low-metallicity M-dwarf Stars". The Astronomical Journal 157 (2): 63. doi:10.3847/1538-3881/aae982. Bibcode: 2019AJ....157...63K. 
  5. ↑ 5.0 5.1 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode: 1986EgUBV........0M. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1. 
  6. ↑ 6.0 6.1 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. doi:10.3847/0004-637X/822/2/97. 97. Bibcode: 2016ApJ...822...97H. 
  7. ↑ 7.0 7.1 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. doi:10.3847/1538-3881/ab05dc. 216. Bibcode: 2019AJ....157..216W. 
  8. ↑ 8.0 8.1 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. doi:10.3847/1538-3881/aae982. 63. Bibcode: 2019AJ....157...63K. 
  9. ↑ "GJ 1062". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+1062. 
  10. ↑ Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. 1. Sky Publishing Corporation and the European Space Agency. p. 308. ISBN 0-933346-84-0. 
  11. ↑ "The astronomical magnitude scale". International Comet Quarterly. http://www.icq.eps.harvard.edu/MagScale.html. 
  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. doi:10.1051/0004-6361:20042287. Bibcode: 2005A&A...438..957K. 
  14. ↑ Fuchs, B.; Jahreiß, H. (January 1998). "Halo stars in the immediate solar neighbourhood". Astronomy and Astrophysics 329: 81. Bibcode: 1998A&A...329...81F. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:GJ_1062&oldid=4288446"