Bonner Durchmusterung -11°3178

light-years

Catalog numbers:
     Gliese (Gl) 444, Henry Draper (HD) 102392, Bonner Durchmusterung (BD) -11°3178, Hipparcos Input Catalog (HIC) 57494, Smithsonian Astrophysical Observatory (SAO) 156885, Vyssotsky McCormick (McC) 619
Arity: binary
Right Ascension and Declination: 11h47m3.882s, -11°49'26.71" (epoch 2000.0)
Distance from Sol: 80.4 light-years (24.6 parsecs)
Standard error in distance: 6.1531%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -78.6, 4.44, -16.5
Galactic (X,Y,Z) coordinates in ly: 9.37, -53.0, 59.7
Proper motion: 0.21 arcsec/yr (254.8° from north)
Radial Velocity: 23 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -15.0, -29.2, 7.45

What do all these fields mean?


Component A:
Spectral class: K8
Luminosity Class: V
Apparent visual magnitude: +9.02
Absolute visual magnitude: +7.06
Visual luminosity: 0.13 x Sol
Color indices: B-V= +1.12, U-B= +1.09, R-I= +0.45
Diameter: 0.71 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.36 A.U.s
Angular size of star in sky in CZ: 1.047859 degrees


Component B:
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +14.20
Absolute visual magnitude: +12.24
Visual luminosity: 0.0011 x Sol
Diameter: 0.27 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.033 A.U.s
Angular size of star in sky in CZ: 4.329714 degrees

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