Bonner Durchmusterung -19°5899

light-years

Catalog numbers:
     Gliese (Gl) 800, Bonner Durchmusterung (BD) -19°5899, Hipparcos Input Catalog (HIC) 102235
Arity: binary
Right Ascension and Declination: 20h42m56.9s, -18°55'7.8" (epoch 2000.0)
Distance from Sol: 48.5 light-years (14.9 parsecs)
Standard error in distance: 9.6774%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 30.0, -34.8, -15.7
Galactic (X,Y,Z) coordinates in ly: 36.0, 18.7, -26.7
Proper motion: 1.1 arcsec/yr (144.0° from north)
Radial Velocity: 5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -8.45, -52.2, -57.1

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +9.92
Combined visual luminosity: 0.0094 x Sol
Observed Separation: 29.8 A.U.s
Source for orbit data: Gliese
As seen from A:
     B would appear as magnitude -11.07
As seen from B:
     A would appear as magnitude -14.23


Component A:
Spectral class: M2
Luminosity Class: V
Apparent visual magnitude: +10.84
Absolute visual magnitude: +9.98
Visual luminosity: 0.0089 x Sol
Diameter: 0.57 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.094 A.U.s
Angular size of star in sky in CZ: 3.221902 degrees


Component B:
Proper motion: 1.1 arcsec/yr (144.0° from north)
Radial Velocity: 5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -8.45, -52.2, -57.1
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +14.00
Absolute visual magnitude: +13.14
Visual luminosity: 0.00048 x Sol
Diameter: 0.25 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.022 A.U.s
Angular size of star in sky in CZ: 6.056316 degrees

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