Cape Photographic Durchmusterung -51°10396

light-years

Catalog numbers:
     Gliese (Gl) 676, Cape Photographic Durchmusterung (CPD) -51°10396, Hipparcos Input Catalog (HIC) 85647, Cordoba Durchmusterung (CD) -51°10924, Luyten Two-Tenth (LTT) 6947
Arity: binary
Right Ascension and Declination: 17h30m10.86s, -51°38'15.1" (epoch 2000.0)
Distance from Sol: 52.6 light-years (16.1 parsecs)
Standard error in distance: 2.8374%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -4.24, -32.4, -41.3
Galactic (X,Y,Z) coordinates in ly: 48.5, -18.2, -9.21
Proper motion: 0.3 arcsec/yr (238.0° from north)
Radial Velocity: -27.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -30.7, -10.5, 14.7

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +8.51
Combined visual luminosity: 0.034 x Sol
Observed Separation: 758 A.U.s
As seen from A:
     B would appear as magnitude -4.90
As seen from B:
     A would appear as magnitude -8.63


Component A:
Spectral class: M0
Luminosity Class: V
Apparent visual magnitude: +9.58
Absolute visual magnitude: +8.54
Visual luminosity: 0.033 x Sol
Color indices: B-V= +1.46, U-B= +1.31, R-I= +0.94
Diameter: 0.5 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.18 A.U.s
Angular size of star in sky in CZ: 1.459069 degrees


Component B:
Right Ascension and Declination: 17h26m20s, -51°35'36" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -4.79, -32.3, -41.2
Galactic (X,Y,Z) coordinates in ly: 48.5, -18.5, -8.73
Proper motion: 0.29 arcsec/yr (240.0° from north)
Radial Velocity: -27.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -30.5, -9.45, 14.6
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +13.31
Absolute visual magnitude: +12.27
Visual luminosity: 0.0011 x Sol
Color indices: B-V= +1.51
Comfort Zone (visual): 0.033 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.