Woolley 9559

light-years

Catalog numbers:
     Gliese (Gl) 620.1, Henry Draper (HD) 147513, Smithsonian Astrophysical Observatory (SAO) 207622, FK5 Extension (FK5 Ext) 3295, Hoffleit Bright Star (HR) 6094, Woolley (Wo) 9559, New Suspected Variable (NSV) 7680
Arity: binary
Right Ascension and Declination: 16h24m1.297s, -39°11'34.98" (epoch 2000.0)
Distance from Sol: 42.0 light-years (12.9 parsecs)
Standard error in distance: 1.0948%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -13.2, -29.7, -26.5
Galactic (X,Y,Z) coordinates in ly: 39.7, -12.9, 4.87
Proper motion: 0.074 arcsec/yr (91.1° from north)
Radial Velocity: 17 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 17.4, -2.42, -1.32

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +4.84
Combined visual luminosity: 1.01 x Sol
Observed Separation: 4505 A.U.s
As seen from A:
     B would appear as magnitude -2.85
As seen from B:
     A would appear as magnitude -8.46


Component A:
Catalog numbers:
     Cordoba Durchmusterung (CD) -38°10983, Hipparcos Input Catalog (HIC) 80337
Spectral class: G3-5
Luminosity Class: V
Apparent visual magnitude: +5.39
Absolute visual magnitude: +4.84
Visual luminosity: 1.01 x Sol
Color indices: B-V= +0.63, U-B= +0.14, R-I= +0.22
Diameter: 1.08 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.00 A.U.s
Angular size of star in sky in CZ: 0.573083 degrees


Component B:
Catalog numbers:
     Cordoba Durchmusterung (CD) -38°10980, Hipparcos Input Catalog (HIC) 80300, Eggen/Greenstein white dwarf (EG) 274
Right Ascension and Declination: 16h23m33.672s, -39°13'46.64" (epoch 1975.0)
Celestial (X,Y,Z) coordinates in ly: -13.3, -29.7, -26.6
Galactic (X,Y,Z) coordinates in ly: 39.6, -12.9, 4.90
Proper motion: 0.08 arcsec/yr (90.0° from north)
Radial Velocity: 52 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 50.5, -12.9, 2.58
Spectral class: DA2
Luminosity Class: wd
Apparent visual magnitude: +11.00
Absolute visual magnitude: +10.45
Visual luminosity: 0.0057 x Sol
Color indices: B-V= -0.14, U-B= -0.96
Comfort Zone (visual): 0.076 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.