Stein 2051

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Coordinates: Sky map 04h 31m 11.52059s, +58° 58′ 37.4806″

Stein 2051
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Stein 2051 A
Right ascension 04h 31m 11.5181s[1]
Declination +58° 58′ 37.461″[1]
Apparent magnitude (V) 10.977[1]
Stein 2051 B
Right ascension 04h 31m 12.570s[2]
Declination +58° 58′ 41.15″[2]
Apparent magnitude (V) 11.19[2]
Characteristics
Stein 2051 A
Spectral type M4.0Ve[1]
U−B color index +1.21[3]
B−V color index +1.65[3]
Stein 2051 B
Spectral type M0.5V[2]
U−B color index -0.53[3]
B−V color index +0.31[3]
Astrometry
Stein 2051 A
Radial velocity (Rv) 29 km/s
Proper motion (μ) RA: 1300.2[4] mas/yr
Dec.: -2049.0[4] mas/yr
Parallax (π) 180 ± 0.8[1] mas
Distance 18.12 ± 0.08 ly
(5.56 ± 0.02 pc)
Stein 2051 B
Radial velocity (Rv) 2.0 km/s
Proper motion (μ) RA: 1335.6[4] mas/yr
Dec.: -1962.6[4] mas/yr
Parallax (π) 179 ± 3[2] mas
Distance 18.2 ± 0.3 ly
(5.59 ± 0.09 pc)
Other designations
Stein 2051, G 175-34, HIP 21088,[5] WDS J04312+5858AB, GJ 169.1,[6] PLX 986.01[7]
Stein 2051 A: LHS 26, NLTT 13373, TYC 3744-412-1, 2MASS J04311147+585837, WISE J043113.20+585816.7[1]
Stein 2051 B: EGGR 180, LHS 27, NLTT 13375, TYC 3744-2062-1, 2MASS J04311201+5858476, WD 0426+58, WD2 0426+585, WD3 0426+588[2]
Database references
SIMBAD The system
A
B

Stein 2051 (Gliese 169.1, G 175-034, LHS 26/27) is a nearby binary star system, containing a red dwarf (component A) and a degenerate star (white dwarf) (component B), located in constellation Camelopardalis at about 18 ly from Earth.[7]

Stein 2051 is the nearest (red dwarf + white dwarf) separate binary system (40 Eridani BC is located closer (at 16.26 light-years),[8] but it is a part of a triple star system).

Stein 2051 B is the 6th nearest white dwarf after Sirius B, Procyon B, van Maanen's star, LP 145-141 and 40 Eridani B.

Properties[edit]

The brighter of this two stars is A (a red dwarf), but the more massive is component B (a white dwarf).

Notes[edit]

References[edit]

  1. ^ a b c d e f "NAME Stein 2051 A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 December 2016. 
  2. ^ a b c d e f "NAME Stein 2051 B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 December 2016. 
  3. ^ a b c d Hardie, R. H. (1966). "UBV Photometry of the Lowell Proper Motion Object G175-34". Publications of the Astronomical Society of the Pacific. 78 (462): 171. Bibcode:1966PASP...78..171H. doi:10.1086/128321. 
  4. ^ a b c d Zacharias, N. (2012). "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". VizieR On-line Data Catalog. Bibcode:2012yCat.1322....0Z. 
  5. ^ Perryman; et al. (1997). "HIP 21088". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-23. 
  6. ^ Gliese, W. & Jahreiß, H. (1991). "Gl 169.1". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-11-23. 
  7. ^ a b Van Altena W. F.; Lee J. T.; Hoffleit E. D. (1995). "GCTP 986.01". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.). Retrieved 2014-11-23. 
  8. ^ Perryman; et al. (1997). "HIP 19849". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-21. 

External links[edit]