O. Struve 298

light-years

Catalog numbers:
     Gliese (Gl) 593, Henry Draper (HD) 139341, Bonner Durchmusterung (BD) +40°2905, Giclas (G) 179-38, Hipparcos Input Catalog (HIC) 76382, Smithsonian Astrophysical Observatory (SAO) 64800, Aitken Double Star (ADS) 9716, O. Struve (STT) 298
Arity: binary
Right Ascension and Declination: 15h36m2.21s, +39°48'9.66" (epoch 2000.0)
Distance from Sol: 71.1 light-years (21.8 parsecs)
Standard error in distance: 1.6938%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -32.1, -44.2, 45.5
Galactic (X,Y,Z) coordinates in ly: 18.7, 38.0, 57.2
Proper motion: 0.465 arcsec/yr (277.3° from north)
Radial Velocity: -67.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -44.9, -64.6, -26.6

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.08
Combined visual luminosity: 0.81 x Sol
Period: 55.88 years
Semimajor Axis: 17.1 A.U.s
Eccentricity: 0.591
Periastron distance: 7.00 A.U.s
Apastron distance: 27.2 A.U.s
Year in which periastron occurs: 1938.26
Source for orbit data: P. Couteau
As seen from A:
     At periastron, B would appear as magnitude -21.42
     At apastron, B would appear as magnitude -18.47
As seen from B:
     At periastron, A would appear as magnitude -21.61
     At apastron, A would appear as magnitude -18.66


Component A:
Spectral class: K2
Luminosity Class: V
Apparent visual magnitude: +7.43
Absolute visual magnitude: +5.74
Visual luminosity: 0.44 x Sol
Diameter: 0.84 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.66 A.U.s
Angular size of star in sky in CZ: 0.673666 degrees


Component B:
Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +7.62
Absolute visual magnitude: +5.93
Visual luminosity: 0.37 x Sol
Diameter: 0.82 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.61 A.U.s
Angular size of star in sky in CZ: 0.717763 degrees

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