Struve 2576

light-years

Catalog numbers:
     Gliese (Gl) 765.4, Henry Draper (HD) 186858, Bonner Durchmusterung (BD) +33°3582, Giclas (G) 125-29, Hipparcos Input Catalog (HIC) 97222, Smithsonian Astrophysical Observatory (SAO) 68799, Aitken Double Star (ADS) 12889, Struve (STF) 2576, New Suspected Variable (NSV) 12386, Woolley (Wo) 9669
Arity: binary
Right Ascension and Declination: 19h45m33.53s, +33°36'7.6" (epoch 2000.0)
Distance from Sol: 66.4 light-years (20.4 parsecs)
Standard error in distance: 2.8306%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 24.6, -49.6, 36.8
Galactic (X,Y,Z) coordinates in ly: 23.8, 61.8, 4.92
Proper motion: 0.431 arcsec/yr (177.7° from north)
Radial Velocity: 4.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 34.9, -6.97, -22.0

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +6.14
Combined visual luminosity: 0.30 x Sol
Period: 224.68 years
Semimajor Axis: 41.7 A.U.s
Eccentricity: 0.762
Periastron distance: 9.93 A.U.s
Apastron distance: 73.5 A.U.s
Year in which periastron occurs: 1945.24
Source for orbit data: W. Rabe
As seen from A:
     At periastron, B would appear as magnitude -19.59
     At apastron, B would appear as magnitude -15.25
As seen from B:
     At periastron, A would appear as magnitude -19.78
     At apastron, A would appear as magnitude -15.44


Component A:
Spectral class: K3
Luminosity Class: V
Apparent visual magnitude: +8.35
Absolute visual magnitude: +6.80
Visual luminosity: 0.17 x Sol
Diameter: 0.8 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.41 A.U.s
Angular size of star in sky in CZ: 1.049349 degrees


Component B:
Spectral class: K3
Luminosity Class: V
Apparent visual magnitude: +8.54
Absolute visual magnitude: +6.99
Visual luminosity: 0.14 x Sol
Diameter: 0.79 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.37 A.U.s
Angular size of star in sky in CZ: 1.130991 degrees

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