UNS 781

light-years

Arity: binary
Right Ascension and Declination: 23h26m56s, +41°11'54" (epoch 1950.0)
Distance from Sol: 48.5 light-years (14.9 parsecs)
Standard error in distance: 3.5868%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 36.1, -5.25, 32.0
Galactic (X,Y,Z) coordinates in ly: -13.3, 44.0, -15.7
Proper motion: 0.404 arcsec/yr (95.0° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +10.50
Combined visual luminosity: 0.0055 x Sol
Observed Separation: 253 A.U.s
As seen from A:
     B would appear as magnitude -7.98
As seen from B:
     A would appear as magnitude -8.55


Component A:
Catalog numbers:
     Giclas (G) 190-28, UNS 781
Spectral class: M2
Luminosity Class: V-VI
Apparent visual magnitude: +11.87
Absolute visual magnitude: +11.01
Visual luminosity: 0.0034 x Sol
Color indices: B-V= +1.52, U-B= +1.09, R-I= +1.14
Comfort Zone (visual): 0.059 A.U.s


Component B:
Catalog numbers:
     Giclas (G) 190-27, U.S. Naval Observatory (USN) 780
Right Ascension and Declination: 23h26m55s, +41°11'42" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 36.1, -5.25, 32.0
Galactic (X,Y,Z) coordinates in ly: -13.3, 44.0, -15.7
Spectral class: M3
Luminosity Class: V-VI
Apparent visual magnitude: +12.44
Absolute visual magnitude: +11.58
Visual luminosity: 0.0020 x Sol
Color indices: B-V= +1.61, U-B= +1.06, R-I= +1.28
Comfort Zone (visual): 0.045 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.