Stein 2051

Catalog numbers:
Gliese (Gl) 169.1, Giclas (G) 175-34, Hipparcos Input Catalog (HIC) 21088, Stein (STI) 2051
Arity: binary
Right Ascension and Declination: 4h31m11.8s, +58°58'38.1" (epoch 2000.0)
Distance from Sol: 18.0 light-years (5.51 parsecs)
Standard error in distance: 1.98%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 3.50, 8.58, 15.4
Galactic (X,Y,Z) coordinates in ly: -15.2, 9.33, 2.44
Proper motion: 2.383 arcsec/yr (144.8° from north)
Radial Velocity: 17 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -47.6, -43.3, -5.39

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +12.10
Combined visual luminosity: 0.0013 x Sol
Observed Separation: 38.6 A.U.s
As seen from A:
B would appear as magnitude -9.91
As seen from B:
A would appear as magnitude -11.27

Component A:
Catalog numbers:
Catalogue Astrographique (AC) +58°25001, Luyten Half-Second (LHS) 26
Spectral class: M4
Luminosity Class: V
Apparent visual magnitude: +11.08
Absolute visual magnitude: +12.37
Visual luminosity: 0.00098 x Sol
Color indices: B-V= +1.65, U-B= +1.20, R-I= +1.14
Comfort Zone (visual): 0.031 A.U.s

Component B:
Catalog numbers:
Catalogue Astrographique (AC) +58°25002, Luyten Half-Second (LHS) 27, Eggen/Greenstein white dwarf (EG) 180, McCook & Sion White Dwarf (WD) 426+58
Spectral class: DC5
Luminosity Class: wd
Apparent visual magnitude: +12.44
Absolute visual magnitude: +13.73
Visual luminosity: 0.00028 x Sol
Color indices: B-V= +0.31, U-B= -0.52, R-I= -0.49
Comfort Zone (visual): 0.017 A.U.s

Data for this star system were most recently updated on 4-April-2001.