17 Cygni

light-years
Proper names: 17 Cygni
Catalog numbers:
     Gliese (Gl) 767.1, Hipparcos Input Catalog (HIC) 97295, Smithsonian Astrophysical Observatory (SAO) 68827, Aitken Double Star (ADS) 12913, Hoffleit Bright Star (HR) 7534, Struve (STF) 2580, Woolley (Wo) 9670
Age: 2800 million years
Source for age: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Heavy element abundance: 76% of Sol
Source for heavy element abundance: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Arity: binary
Right Ascension and Declination: 19h46m25.61s, +33°43'39.6" (epoch 2000.0)
Distance from Sol: 68.0 light-years (20.9 parsecs)
Standard error in distance: 1.1139%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 25.3, -50.6, 37.8
Galactic (X,Y,Z) coordinates in ly: 24.2, 63.4, 4.93
Proper motion: 0.444 arcsec/yr (178.9° from north)
Radial Velocity: 4.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 37.0, -7.87, -22.6

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +3.36
Combined visual luminosity: 3.93 x Sol
Observed Separation: 538 A.U.s
Year of separation observation: 1832
As seen from A:
     B would appear as magnitude -10.95
As seen from B:
     A would appear as magnitude -14.51

Data for B and 's orbit around one other:
Combined absolute visual magnitude: +6.96
Combined visual luminosity: 0.14 x Sol
Observed Separation: 542 A.U.s
Year of separation observation: 1953
As seen from :
     B would appear as magnitude -10.94


Component A:
Catalog numbers:
     Henry Draper (HD) 187013, Bonner Durchmusterung (BD) +333587
Spectral class: F5
Luminosity Class: IV-V
Apparent visual magnitude: +5.00
Absolute visual magnitude: +3.40
Visual luminosity: 3.79 x Sol
Color indices: B-V= +0.47, U-B= +0.00
Diameter: 1.10 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.95 A.U.s
Angular size of star in sky in CZ: 0.301433 degrees


Component B:
Catalog numbers:
     Henry Draper Extension (HDE) 225732, Bonner Durchmusterung (BD) +333589
Right Ascension and Declination: 19h44m34s, +33°36'48" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 25.0, -50.9, 37.7
Galactic (X,Y,Z) coordinates in ly: 24.5, 63.2, 5.26
Proper motion: 0.443 arcsec/yr (177.6° from north)
Radial Velocity: 4.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 36.7, -7.45, -23.2
Spectral class: K6
Luminosity Class: V
Apparent visual magnitude: +8.56
Absolute visual magnitude: +6.96
Visual luminosity: 0.14 x Sol
Color indices: B-V= +1.04, U-B= +0.95, R-I= +0.38
Diameter: 0.76 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.38 A.U.s
Angular size of star in sky in CZ: 1.072383 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 12-May-2001.