Bonner Durchmusterung -18°3019

light-years

Catalog numbers:
     Gliese (Gl) 401, Bonner Durchmusterung (BD) -18°3019, Hipparcos Input Catalog (HIC) 52621, New Suspected Variable (NSV) 4963
Arity: binary
Right Ascension and Declination: 10h45m39.098s, -19°6'52.14" (epoch 2000.0)
Distance from Sol: 42 light-years (13 parsecs)
Standard error in distance: 15.2412%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -38, 13, -14
Galactic (X,Y,Z) coordinates in ly: -1.9, -35, 24
Proper motion: 1.98 arcsec/yr (250.5° from north)
Radial Velocity: 36 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -77, -81, -59

What do all these fields mean?


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 289
Spectral class: M1
Luminosity Class: V-VI
Apparent visual magnitude: +11.03
Absolute visual magnitude: +10.47
Visual luminosity: 0.006 x Sol
Color indices: B-V= +1.44, U-B= +0.96, R-I= +0.77
Diameter: 0.46 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.08 A.U.s
Angular size of star in sky in CZ: 3.264451 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 290
Spectral class: DQ9
Luminosity Class: wd
Apparent visual magnitude: +16.50
Absolute visual magnitude: +15.94
Visual luminosity: 0.00004 x Sol
Comfort Zone (visual): 0.006 A.U.s

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