CU Cancri

light-years
Proper names: CU Cancri
Catalog numbers:
     Gliese & Jahreiss (GJ) 2069, Hipparcos Input Catalog (HIC) 41824, Giclas (G) 9-8
Arity: binary
Right Ascension and Declination: 8h31m37.567s, +19°23'39.34" (epoch 2000.0)
Distance from Sol: 41.8 light-years (12.8 parsecs)
Standard error in distance: 6.7948%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -24.2, 31.1, 13.9
Galactic (X,Y,Z) coordinates in ly: -32.2, -15.6, 21.5
Proper motion: 0.282 arcsec/yr (245.0° 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: +11.09
Combined visual luminosity: 0.0032 x Sol
Observed Separation: 154 A.U.s
As seen from A:
     B would appear as magnitude -7.86
As seen from B:
     A would appear as magnitude -9.29


Component A:
Catalog numbers:
     Giclas (G) 40-25
Spectral class: M5e
Luminosity Class: V
Apparent visual magnitude: +11.89 (increasing to +8.89)
Absolute visual magnitude: +11.35 (increasing to +8.35)
Visual luminosity: 0.0025 x Sol (increasing to 0.040 x Sol)
Variable type: UV Ceti flare star (eruptive variable)
Color indices: R-I= +1.26
Comfort Zone (visual): 0.050 A.U.s


Component B:
Catalog numbers:
     Giclas (G) 40-26
Right Ascension and Declination: 8h28m46s, +19°34'12" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -23.8, 31.4, 14.0
Galactic (X,Y,Z) coordinates in ly: -32.5, -15.4, 21.2
Apparent visual magnitude: +13.32
Absolute visual magnitude: +12.78
Visual luminosity: 0.00067 x Sol
Color indices: R-I= +1.36
Comfort Zone (visual): 0.026 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.