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Stein 2051

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Star in the constellation Camelopardalis
Stein 2051

Image of Stein 2051 B and a background star taken by the Hubble Space Telescope.
Credit: NASA, ESA, and K. Sahu (STScI)
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Stein 2051 A
Right ascension 04 31 11.5181
Declination +58° 58′ 37.461″
Apparent magnitude (V) 10.977
Stein 2051 B
Right ascension 04 31 12.570
Declination +58° 58′ 41.15″
Apparent magnitude (V) 11.19
Characteristics
Stein 2051 A
Spectral type M4.0Ve
U−B color index +1.21
B−V color index +1.65
Stein 2051 B
Spectral type DC5
U−B color index -0.53
B−V color index +0.31
Astrometry
Stein 2051 A
Radial velocity (Rv)29 km/s
Proper motion (μ) RA: 1300.365 mas/yr
Dec.: -2046.106 mas/yr
Parallax (π)181.2438 ± 0.0499 mas
Distance17.995 ± 0.005 ly
(5.517 ± 0.002 pc)
Stein 2051 B
Radial velocity (Rv)2.0 km/s
Proper motion (μ) RA: 1334.780±0.021 mas/yr
Dec.: −1947.638±0.019 mas/yr
Parallax (π)181.2730 ± 0.0203 mas
Distance17.993 ± 0.002 ly
(5.5165 ± 0.0006 pc)
Details
Stein 2051 A
Mass0.252±0.013 M☉
Radius0.292±0.031 R☉
Luminosity0.0081 L☉
Surface gravity (log g)4.80
−0.10 cgs
Temperature3277
−75 K
Metallicity 0.26
−0.22 dex
Rotational velocity (v sin i)5.2
−2.7 km/s
Stein 2051 B
Mass0.675±0.051 M☉
Radius0.0114±0.0004 R☉
Temperature7122±181 K
Other designations
Stein 2051, G 175-34, HIP 21088, WDS J04312+5858AB, GJ 169.1, PLX 986.01
Stein 2051 A: LHS 26, NLTT 13373, TYC 3744-412-1, 2MASS J04311147+585837, WISE J043113.20+585816.7
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
Database references
SIMBADThe system
A
B
Stein 2051 is located in the constellation CamelopardalisStein 2051 is located in the constellation CamelopardalisStein 2051Location 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 red dwarf (component A) and a degenerate star (white dwarf) (component B), located in constellation Camelopardalis at about 18 ly from Earth.

Stein 2051 is the nearest (red dwarf + white dwarf) separate binary system (40 Eridani BC is located closer at 16.26 light-years, 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

The brighter of these 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.

References

  1. "Einstein revisited". www.spacetelescope.org. Retrieved 12 June 2017.
  2. ^ "NAME Stein 2051 A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 December 2016.
  3. ^ "NAME Stein 2051 B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 December 2016.
  4. ^ 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.
  5. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  6. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  7. Passegger, V. M.; Bello-García, A.; Ordieres-Meré, J.; Caballero, J. A.; Schweitzer, A.; González-Marcos, A.; Ribas, I.; Reiners, A.; Quirrenbach, A.; Amado, P. J.; Azzaro, M.; Bauer, F. F.; Béjar, V. J. S.; Cortés-Contreras, M.; Dreizler, S.; Hatzes, A. P.; Henning, Th.; Jeffers, S. V.; Kaminski, A.; Kürster, M.; Lafarga, M.; Marfil, E.; Montes, D.; Morales, J. C.; Nagel, E.; Sarro, L. M.; Solano, E.; Tabernero, H. M.; Zechmeister, M. (2020), "The CARMENES search for exoplanets around M dwarfs", Astronomy & Astrophysics, 642: A22, arXiv:2008.01186, Bibcode:2020A&A...642A..22P, doi:10.1051/0004-6361/202038787
  8. ^ Ghosh, Samrat; Ghosh, Supriyo; Das, Ramkrishna; Mondal, Soumen; Khata, Dhrimadri (2020), "Understanding the physical properties of young M dwarfs: NIR spectroscopic studies", Monthly Notices of the Royal Astronomical Society, 493 (3): 4533–4550, arXiv:2002.05762, Bibcode:2020MNRAS.493.4533K, doi:10.1093/mnras/staa427
  9. ^ Sahu, Kailash C.; et al. (June 2017), "Relativistic deflection of background starlight measures the mass of a nearby white dwarf star", Science, 356 (6342): 1046–1050, arXiv:1706.02037, Bibcode:2017Sci...356.1046S, doi:10.1126/science.aal2879, PMID 28592430, 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. ^ 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

Known celestial objects within 20 light-years
Primary member type
Celestial objects by systems. Secondary members are listed in small print.
    0–10 ly →
Main-sequence
stars
A-type
G-type
M-type
(red dwarfs)
Brown dwarfs
L-type
  • Luhman 16 (6.5029±0.0011 ly)
  • T-type brown dwarf B
Sub-brown dwarfs
and rogue planets
Y-type
← 10–15 ly →
Subgiant stars
F-type
Main-sequence
stars
G-type
  • Tau Ceti (11.9118±0.0074 ly)
  • 4 (8?) planets: (b), (c), (d), e, f, g, h, (i)
K-type
M-type
(red dwarfs)
Degenerate
stars
White dwarfs
Brown dwarfs
T-type
← 15–20 ly    
Subgiant stars
G-type
Main-sequence
stars
A-type
G-type
K-type
M-type
(red dwarfs)
Degenerate
stars
White dwarfs
Brown dwarfs
L-type
T-type
Y-type
Sub-brown dwarfs
and rogue planets
Y-type
Italic are systems without known trigonometric parallax.
Constellation of Camelopardalis
Stars
Bayer
Flamsteed
Variable
HR
HD
Other
Exoplanets
Star clusters
Nebulae
Galaxies
NGC
Other
Galaxy clusters
Astronomical events
Category
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