Astronomy:GJ 1062
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 38m 15.69799s[1] |
| Declination | −11° 29′ 13.5050″[1] |
| Apparent magnitude (V) | +13.010[2] |
| Characteristics | |
| Spectral type | M2.5VI[3] |
| U−B color index | +1.385[4] |
| B−V color index | +1.605[4] |
| R−I color index | 1.184[2] |
| Astrometry | |
| Radial velocity (Rv) | −84.88±0.56[1] km/s |
| Proper motion (μ) | RA: 1,458.201[1] mas/yr Dec.: −2,696.545[1] mas/yr |
| Parallax (π) | 61.8861 ± 0.0220[1] mas |
| Distance | 52.70 ± 0.02 ly (16.159 ± 0.006 pc) |
| Absolute magnitude (MV) | 10.608[5] |
| Details | |
| Mass | 0.255[6] M☉ |
| Radius | 0.411±0.051 R☉[2] 0.372±0.076 R☉[5] 0.202±0.012[7] R☉ |
| Luminosity | 0.0055[2] L☉ |
| Temperature | 3,488±50[2] K |
| Metallicity [Fe/H] | −0.28±0.15[7] dex |
| Rotational velocity (v sin i) | 9.80[2] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
GJ 1062 is a single[6] red dwarf star in the constellation Eridanus, positioned about two degrees to the SSE of Epsilon Eridani.[9] 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,[2] requiring a telescope with at least a 25 cm (10 in) aperture to view.[10] 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.[1] The star has a high proper motion, traversing the sky at the rate of 3.033 arcseconds per year.[11]
This is an M-type subdwarf star with a stellar classification of M2.5VI.[3] 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.[12] GJ 1062 is considered a likely member of the halo population, and thus is a MACHO.[13]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 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.
- ↑ 3.0 3.1 Gizis, John E. (1997). "M-Subdwarfs: Spectroscopic Classification and the Metallicity Scale". Astronomical Journal 113: 806–822. doi:10.1086/118302. Bibcode: 1997AJ....113..806G.
- ↑ 4.0 4.1 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.
- ↑ 5.0 5.1 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.
- ↑ 6.0 6.1 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.
- ↑ 7.0 7.1 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.
- ↑ "GJ 1062". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+1062.
- ↑ 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.
- ↑ "The astronomical magnitude scale". International Comet Quarterly. http://www.icq.eps.harvard.edu/MagScale.html.
- ↑ Luyten, W. J. (June 1995). "NLTT Catalogue". VizieR Online Data Catalog. Bibcode: 1995yCat.1098....0L.
- ↑ 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.
- ↑ Fuchs, B.; Jahreiß, H. (January 1998). "Halo stars in the immediate solar neighbourhood". Astronomy and Astrophysics 329: 81. Bibcode: 1998A&A...329...81F.
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