Bonner Durchmusterung +55°1519

light-years

Catalog numbers:
     Gliese (Gl) 458, Henry Draper Extension (HDE) 238090, Bonner Durchmusterung (BD) +55°1519, Hipparcos Input Catalog (HIC) 59514, Vyssotsky McCormick (McC) 137
Arity: binary
Right Ascension and Declination: 12h12m20.75s, +54°29'8.6" (epoch 2000.0)
Distance from Sol: 50.0 light-years (15.3 parsecs)
Standard error in distance: 2.2019%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -29.0, -1.56, 40.7
Galactic (X,Y,Z) coordinates in ly: -16.3, 16.7, 44.1
Proper motion: 0.244 arcsec/yr (70.3° from north)
Radial Velocity: -17.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 18.0, 6.92, -15.9

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +8.80
Combined visual luminosity: 0.026 x Sol
Observed Separation: 230 A.U.s
As seen from A:
     B would appear as magnitude -7.36
As seen from B:
     A would appear as magnitude -10.92


Component A:
Catalog numbers:
     Giclas (G) 197-49
Spectral class: M1.5
Luminosity Class: V
Apparent visual magnitude: +9.77
Absolute visual magnitude: +8.84
Visual luminosity: 0.025 x Sol
Color indices: B-V= +1.43, U-B= +1.16, R-I= +0.73
Diameter: 0.6 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.16 A.U.s
Angular size of star in sky in CZ: 2.010273 degrees


Component B:
Catalog numbers:
     Giclas (G) 197-50
Right Ascension and Declination: 12h9m51s, +54°45'54" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -28.8, -1.24, 40.8
Galactic (X,Y,Z) coordinates in ly: -16.7, 16.7, 44.0
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +13.33
Absolute visual magnitude: +12.40
Visual luminosity: 0.00095 x Sol
Color indices: B-V= +1.61, R-I= +1.20
Comfort Zone (visual): 0.031 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.