Stein 2051
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Camelopardalis |
| Stein 2051 A | |
| Right ascension | 04h 31m 11.5181s |
| Declination | +58° 58′ 37.461″ |
| Apparent magnitude (V) | 10.977 |
| Stein 2051 B | |
| Right ascension | 04h 31m 12.570s |
| 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 | M0.5V |
| 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: 1300.2 mas/yr Dec.: -2049.0 mas/yr |
| Parallax (π) | 180 ± 0.8mas |
| 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 mas/yr Dec.: -1962.6 mas/yr |
| Parallax (π) | 179 ± 3mas |
| Distance | 18.2 ± 0.3 ly (5.59 ± 0.09 pc) |
| Other designations | |
| 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 | |
| SIMBAD | The system |
| A | |
| B | |
Coordinates: 
04h 31m 11.52059s, +58° 58′ 37.4806″
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.
The brighter of this two stars is A (a red dwarf), but the more massive is component B (a white dwarf).
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