Bonner Durchmusterung +4°4048

light-years

Catalog numbers:
     Gliese (Gl) 752, Henry Draper (HD) 180617, Bonner Durchmusterung (BD) +4°4048, Giclas (G) 22-22, Hipparcos Input Catalog (HIC) 94761, Vyssotsky McCormick (McC) 65
Arity: binary
Right Ascension and Declination: 19h16m55.2s, +5°10'7.44" (epoch 2000.0)
Distance from Sol: 19.16 light-years (5.873 parsecs)
Standard error in distance: 0.7982%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 6.284, -18.01, 1.726
Galactic (X,Y,Z) coordinates in ly: 14.46, 12.49, -1.264
Proper motion: 1.466 arcsec/yr (204.2° from north)
Radial Velocity: 36.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 53.90, -7.261, -5.075

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +10.27
Combined visual luminosity: 0.00682 x Sol
Observed Separation: 469.9 A.U.s
As seen from A:
     B would appear as magnitude +0.46
As seen from B:
     A would appear as magnitude -7.95


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 473
Spectral class: M3n
Luminosity Class: V
Apparent visual magnitude: +9.11
Absolute visual magnitude: +10.27
Visual luminosity: 0.00682 x Sol
Color indices: B-V= +1.50, U-B= +1.15, R-I= +1.02
Mass: 0.39 x Sol
Diameter: 0.663 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.0826 A.U.s
Orbital period in CZ: 13.8775 days
Tidal index in CZ: 692.725
Angular size of star in sky in CZ: 4.279229 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 474, VB 10
Right Ascension and Declination: 19h14m32s, +5°4'42" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 6.097, -18.08, 1.696
Galactic (X,Y,Z) coordinates in ly: 14.55, 12.41, -1.103
Proper motion: 1.461 arcsec/yr (203.1° from north)
Radial Velocity: 36.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 53.73, -7.451, -5.486
Spectral class: M8
Luminosity Class: V
Apparent visual magnitude: +17.52
Absolute visual magnitude: +18.68
Visual luminosity: 0.00000295 x Sol
Variable type: UV Ceti flare star (eruptive variable)
Color indices: B-V= +2.20, R-I= +1.83
Diameter: 0.138 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.00172 A.U.s
Angular size of star in sky in CZ: 42.849389 degrees

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