Stein 2051

Coordinates: Sky map 04h 31m 11.52059s, +58° 58′ 37.4806″
Source: Wikipedia, the free encyclopedia.
Stein 2051

Image of Stein 2051 B and a background star taken by the Hubble Space Telescope.[1]
Credit: NASA, ESA, and K. Sahu (STScI)
Observation data
J2000
Constellation Camelopardalis
Stein 2051 A
Right ascension 04h 31m 11.5181s[2]
Declination +58° 58′ 37.461″[2]
Apparent magnitude (V) 10.977[2]
Stein 2051 B
Right ascension 04h 31m 12.570s[3]
Declination +58° 58′ 41.15″[3]
Apparent magnitude (V) 11.19[3]
Characteristics
Stein 2051 A
Spectral type M4.0Ve[2]
U−B color index +1.21[4]
B−V color index +1.65[4]
Stein 2051 B
Spectral type DC5[3]
U−B color index -0.53[4]
B−V color index +0.31[4]
Distance
17.993 ± 0.002 ly
(5.5165 ± 0.0006 pc)
Details
Rotational velocity (v sin i)
5.2+1.7
−2.7 km/s
Stein 2051 B
Mass0.675±0.051[9] M☉
Radius0.0114±0.0004[9] R☉
Temperature7122±181[9] K
Other designations
Stein 2051, G 175-34, HIP 21088,[10] WDS J04312+5858AB, GJ 169.1,[11] PLX 986.01[12]
Stein 2051 A: LHS 26, NLTT 13373, TYC 3744-412-1, 2MASS J04311147+585837, WISE J043113.20+585816.7[2]
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[3]
Database references
SIMBADThe system
A
B
Stein 2051 is located in the constellation Camelopardalis
Stein 2051 is located in the constellation Camelopardalis
Stein 2051
Location of Stein 2051 in the constellation Camelopardalis

Stein 2051 (Gliese 169.1, G 175-034, LHS 26/27) is a nearby binary star system, containing a

degenerate star (white dwarf) (component B), located in constellation Camelopardalis at about 18 ly from Earth.[12]

Stein 2051 is the nearest (red dwarf + white dwarf) separate binary system (40 Eridani BC is located closer at 16.26 light-years,[13] but it is a part of a triple star system).

Stein 2051 B is the 6th nearest

40 Eridani B
.

Properties

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

In 2017, Stein 2051 B was observed passing in front of a more distant star. The

bending of starlight by the gravitational field of the nearer star allowed its mass to be directly measured. The estimated mass of Stein 2051 B is 0.675±0.051 M☉, which fits the expected range of a white dwarf with a carbon-oxygen core.[9]

References

  1. ^ "Einstein revisited". www.spacetelescope.org. Retrieved 12 June 2017.
  2. ^ a b c d e "NAME Stein 2051 A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 December 2016.
  3. ^ a b c d e "NAME Stein 2051 B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 December 2016.
  4. ^
    doi:10.1086/128321
    .
  5. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  6. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  7. doi:10.1051/0004-6361/202038787
  8. ^
    doi:10.1093/mnras/staa427
  9. ^
    S2CID 206654918
    .
  10. ^ Perryman; et al. (1997). "HIP 21088". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-23.
  11. ^ Gliese, W. & Jahreiß, H. (1991). "Gl 169.1". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-11-23.
  12. ^ 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.
  13. ^ Perryman; et al. (1997). "HIP 19849". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-21.

External links

Stub icon

This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it.

Stub icon

This article about a red dwarf is a stub. You can help Wikipedia by expanding it.

Stub icon

This article about a white dwarf is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Stein_2051&oldid=1191776580"