Wolf 1561

light-years

Catalog numbers:
     Wolf 1561
Arity: binary
Right Ascension and Declination: 22h14m42s, -9°3'0" (epoch 1950.0)
Distance from Sol: 33.2 light-years (10.2 parsecs)
Standard error in distance: 3.2544%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 29.4, -14.6, -5.23
Galactic (X,Y,Z) coordinates in ly: 13.3, 17.2, -25.2
Proper motion: 0.537 arcsec/yr (239.1° from north)
Radial Velocity: 54 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 45.3, 20.9, -33.2

What do all these fields mean?


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 3787
Spectral class: M4.5e
Luminosity Class: V
Apparent visual magnitude: +13.40
Absolute visual magnitude: +13.36
Visual luminosity: 0.00039 x Sol
Color indices: B-V= +1.70, U-B= +1.20, R-I= +1.27
Diameter: 0.22 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.020 A.U.s
Angular size of star in sky in CZ: 5.901909 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 3788
Spectral class: M5e
Luminosity Class: V
Apparent visual magnitude: +14.40
Absolute visual magnitude: +14.36
Visual luminosity: 0.00016 x Sol
Color indices: B-V= +1.90, U-B= +1.80, R-I= +1.46
Diameter: 0.17 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.013 A.U.s
Angular size of star in sky in CZ: 7.228173 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.