Cordoba Durchmusterung -45°13677

light-years

Catalog numbers:
     Gliese (Gl) 784, Henry Draper (HD) 191849, Cordoba Durchmusterung (CD) -45°13677, Luyten Half-Second (LHS) 3531, Hipparcos Input Catalog (HIC) 99701, Smithsonian Astrophysical Observatory (SAO) 230110, UGPMF 492, Smethells (Sm) 50
Arity: singular
Right Ascension and Declination: 20h13m53.374s, -45°9'50.78" (epoch 2000.0)
Distance from Sol: 20.24 light-years (6.205 parsecs)
Standard error in distance: 0.6656%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 7.870, -11.90, -14.35
Galactic (X,Y,Z) coordinates in ly: 16.80, -1.446, -11.19
Proper motion: 0.796 arcsec/yr (102.5° from north)
Radial Velocity: -31.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -38.85, 0.951, -2.211

What do all these fields mean?


Spectral class: M0
Luminosity Class: V
Apparent visual magnitude: +7.97
Absolute visual magnitude: +9.01
Visual luminosity: 0.0218 x Sol
Color indices: B-V= +1.43, U-B= +1.18, R-I= +0.73
Mass: 0.33 x Sol
Diameter: 0.567 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.148 A.U.s
Orbital period in CZ: 36.0284 days
Tidal index in CZ: 102.775
Angular size of star in sky in CZ: 2.048249 degrees

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