Cape Photographic Durchmusterung -50°441

light-years

Catalog numbers:
     Gliese (Gl) 140.1, Henry Draper (HD) 21209, Cape Photographic Durchmusterung (CPD) -50°441, Hipparcos Input Catalog (HIC) 15771, Smithsonian Astrophysical Observatory (SAO) 233095, Woolley (Wo) 9115
Arity: binary
Right Ascension and Declination: 3h23m15.66s, -49°59'36.9" (epoch 2000.0)
Distance from Sol: 65 light-years (20 parsecs)
Standard error in distance: 10.0753%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 26, 32, -50
Galactic (X,Y,Z) coordinates in ly: -6.0, -39, -52
Proper motion: 0.367 arcsec/yr (41.5° from north)
Radial Velocity: -12.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -33, 3.6, 16

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +6.79
Combined visual luminosity: 0.2 x Sol
Observed Separation: 293 A.U.s
As seen from A:
     B would appear as magnitude -10.42
As seen from B:
     A would appear as magnitude -12.27


Component A:
Catalog numbers:
     Cordoba Durchmusterung (CD) -50°1015
Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +8.47
Absolute visual magnitude: +6.97
Visual luminosity: 0.1 x Sol
Color indices: R-I= +0.38
Diameter: 0.75 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.4 A.U.s
Angular size of star in sky in CZ: 1.062324 degrees


Component B:
Catalog numbers:
     Cordoba Durchmusterung (CD) -50°1014
Right Ascension and Declination: 3h21m42s, -50°10'35" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 27, 32, -50
Galactic (X,Y,Z) coordinates in ly: -5.6, -39, -52
Proper motion: 0.363 arcsec/yr (35.1° from north)
Radial Velocity: -12 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -33, 6.6, 14
Spectral class: K
Luminosity Class: V
Apparent visual magnitude: +10.32
Absolute visual magnitude: +8.82
Visual luminosity: 0.03 x Sol
Color indices: B-V= +1.39, U-B= +1.31, R-I= +0.60
Comfort Zone (visual): 0.2 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.