Ross 193

light-years

Catalog numbers:
     Gliese (Gl) 812, Hipparcos Input Catalog (HIC) 103393, Ross 193
Arity: binary
Right Ascension and Declination: 20h56m48.56s, -4°50'49" (epoch 2000.0)
Distance from Sol: 51.4 light-years (15.7 parsecs)
Standard error in distance: 6.4801%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 35.7, -36.7, -4.34
Galactic (X,Y,Z) coordinates in ly: 31.7, 30.9, -26.0
Proper motion: 0.816 arcsec/yr (106.1° from north)
Radial Velocity: -44.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -58.6, -37.9, -28.6

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +10.91
Combined visual luminosity: 0.0038 x Sol
Observed Separation: 299 A.U.s
As seen from A:
     B would appear as magnitude -3.58
As seen from B:
     A would appear as magnitude -8.27


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 3602
Spectral class: M3
Luminosity Class: V
Apparent visual magnitude: +11.91
Absolute visual magnitude: +10.92
Visual luminosity: 0.0037 x Sol
Color indices: B-V= +1.51, U-B= +1.06, R-I= +1.14
Diameter: 0.41 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.061 A.U.s
Angular size of star in sky in CZ: 3.584550 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 3601, Eggen/Greenstein white dwarf (EG) 202, VB 11
Right Ascension and Declination: 20h54m6s, -5°2'0" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 35.2, -37.1, -4.51
Galactic (X,Y,Z) coordinates in ly: 32.2, 30.7, -25.7
Spectral class: DC9+
Luminosity Class: wd
Apparent visual magnitude: +16.60
Absolute visual magnitude: +15.61
Visual luminosity: 0.000049 x Sol
Color indices: B-V= +1.16, U-B= +0.64, R-I= +0.45
Diameter: 0.02 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.0070 A.U.s
Angular size of star in sky in CZ: 1.516096 degrees

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