Bonner Durchmusterung +21°2486

light-years

Catalog numbers:
     Gliese (Gl) 499, Bonner Durchmusterung (BD) +21°2486, Hipparcos Input Catalog (HIC) 63942, Smithsonian Astrophysical Observatory (SAO) 82649, Vyssotsky McCormick (McC) 141
Arity: binary
Right Ascension and Declination: 13h6m15.355s, +20°43'43.5" (epoch 2000.0)
Distance from Sol: 60.6 light-years (18.6 parsecs)
Standard error in distance: 4.2379%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -54.4, -16.2, 21.5
Galactic (X,Y,Z) coordinates in ly: 7.39, -3.52, 60.1
Proper motion: 0.084 arcsec/yr (315.6° from north)
Radial Velocity: -1.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -7.43, 1.47, -0.82

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +8.09
Combined visual luminosity: 0.051 x Sol
Observed Separation: 14.9 A.U.s
Year of separation observation: 1902
As seen from A:
     B would appear as magnitude -12.16
As seen from B:
     A would appear as magnitude -17.62

Data for A and B's orbit, take 2:
Observed Separation: 18.6 A.U.s
Year of separation observation: 1962
As seen from A:
     B would appear as magnitude -11.67
As seen from B:
     A would appear as magnitude -17.13


Component A:
Spectral class: M0
Luminosity Class: V
Apparent visual magnitude: +9.44
Absolute visual magnitude: +8.09
Visual luminosity: 0.050 x Sol
Diameter: 0.68 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.22 A.U.s
Angular size of star in sky in CZ: 1.614281 degrees


Component B:
Proper motion: 0.084 arcsec/yr (315.6° from north)
Radial Velocity: -2.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -7.52, 1.51, -1.51
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +14.90
Absolute visual magnitude: +13.55
Visual luminosity: 0.00033 x Sol
Diameter: 0.21 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.018 A.U.s
Angular size of star in sky in CZ: 6.162306 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.