Catalogue Astrographique +31°68884

Catalog numbers:
Gliese (Gl) 856, Catalogue Astrographique (AC) +31°68884, Giclas (G) 189-16, Hipparcos Input Catalog (HIC) 110526, Vyssotsky McCormick (McC) 840
Arity: binary
Right Ascension and Declination: 22h23m29.07s, +32°27'32.9" (epoch 2000.0)
Distance from Sol: 52 light-years (16 parsecs)
Standard error in distance: 13.866%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 40, -18, 28
Galactic (X,Y,Z) coordinates in ly: -0.5, 49, -19
Proper motion: 0.327 arcsec/yr (133.0° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined spectrum: M0e V
Combined absolute visual magnitude: +9.72
Combined visual luminosity: 0.01 x Sol
Observed Separation: 23 A.U.s
Year of separation observation: 1964
As seen from A:
B would appear as magnitude -14.24
As seen from B:
A would appear as magnitude -14.43

Component A:
Apparent visual magnitude: +11.41
Absolute visual magnitude: +10.38
Visual luminosity: 0.006 x Sol
Diameter: 0.53 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.08 A.U.s
Angular size of star in sky in CZ: 3.604304 degrees

Component B:
Apparent visual magnitude: +11.60
Absolute visual magnitude: +10.57
Visual luminosity: 0.005 x Sol
Diameter: 0.5 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.07 A.U.s
Angular size of star in sky in CZ: 3.711226 degrees

Data for this star system were most recently updated on 4-April-2001.