Bonner Durchmusterung -21°1074

light-years

Catalog numbers:
     Bonner Durchmusterung (BD) -21°1074
Arity: trinary
Right Ascension and Declination: 5h4m42s, -21°39'0" (epoch 1950.0)
Distance from Sol: 39 light-years (12 parsecs)
Standard error in distance: 12.6316%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 8.7, 35, -14
Galactic (X,Y,Z) coordinates in ly: -25, -22, -21

What do all these fields mean?

Data for A and (B-C)'s orbit around one other:
Combined absolute visual magnitude: +9.52
Combined visual luminosity: 0.01 x Sol
Observed Separation: 100 A.U.s
As seen from A:
     (B-C) would appear as magnitude -10.68
As seen from (B-C):
     A would appear as magnitude -11.69

Data for B and C's orbit around one other:
Combined spectrum: M3 V
Combined absolute visual magnitude: +10.89
Combined visual luminosity: 0.004 x Sol
Observed Separation: 16 A.U.s
As seen from B:
     C would appear as magnitude -13.33
As seen from C:
     B would appear as magnitude -14.34


Component A:
Catalog numbers:
     Steph 546
Spectral class: M2
Luminosity Class: V
Apparent visual magnitude: +10.29
Absolute visual magnitude: +9.89
Visual luminosity: 0.010 x Sol
Color indices: B-V= +1.52, R-I= +0.90
Comfort Zone (visual): 0.10 A.U.s


Component B:
Catalog numbers:
     Steph 545
Apparent visual magnitude: +11.66
Absolute visual magnitude: +11.26
Visual luminosity: 0.003 x Sol
Comfort Zone (visual): 0.05 A.U.s


Component C:
Apparent visual magnitude: +12.67
Absolute visual magnitude: +12.27
Visual luminosity: 0.001 x Sol
Comfort Zone (visual): 0.03 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.