Cordoba Durchmusterung -31°10649

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 1177, Henry Draper (HD) 120036, Cordoba Durchmusterung (CD) -31°10649, Hipparcos Input Catalog (HIC) 67308, UGPMF 334
Arity: binary
Right Ascension and Declination: 13h47m42.51s, -32°25'49.9" (epoch 2000.0)
Distance from Sol: 53.4 light-years (16.4 parsecs)
Standard error in distance: 4.5781%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -40.2, -20.4, -28.6
Galactic (X,Y,Z) coordinates in ly: 34.4, -31.9, 25.5
Proper motion: 0.102 arcsec/yr (105.9° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +7.20
Combined visual luminosity: 0.11 x Sol
Observed Separation: 213 A.U.s
As seen from A:
     B would appear as magnitude -11.88
As seen from B:
     A would appear as magnitude -12.06


Component A:
Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +8.94
Absolute visual magnitude: +7.87
Visual luminosity: 0.062 x Sol
Color indices: B-V= +1.32, U-B= +1.22, R-I= +0.57
Comfort Zone (visual): 0.25 A.U.s


Component B:
Right Ascension and Declination: 13h44m50s, -32°10'54" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -40.6, -20.0, -28.4
Galactic (X,Y,Z) coordinates in ly: 33.9, -32.2, 25.9
Proper motion: 0.121 arcsec/yr (120.8° from north)
Source for proper motion: Gliese
Spectral class: K
Luminosity Class: V
Apparent visual magnitude: +9.12
Absolute visual magnitude: +8.05
Visual luminosity: 0.053 x Sol
Color indices: B-V= +1.36, U-B= +1.24, R-I= +0.60
Comfort Zone (visual): 0.23 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.