16 Cygni

light-years
Proper names: 16 Cygni
Catalog numbers:
     Gliese (Gl) 765.1, Aitken Double Star (ADS) 12815, Struve (STF) 46
Heavy element abundance: 141% of Sol
Standard error in heavy element abundance: 14%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: binary
Right Ascension and Declination: 19h41m48.91s, +50°31'30.4" (epoch 2000.0)
Distance from Sol: 70.5 light-years (21.6 parsecs)
Standard error in distance: 1.0695%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 19.3, -40.5, 54.4
Galactic (X,Y,Z) coordinates in ly: 7.71, 68.3, 16.0
Proper motion: 0.214 arcsec/yr (225.9° from north)
Radial Velocity: -27.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 17.5, -30.4, 0.56

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +3.65
Combined visual luminosity: 3.01 x Sol
Observed Separation: 843 A.U.s
Source for orbit data: Burnham's Celestial Handbook
As seen from A:
     B would appear as magnitude -12.40
As seen from B:
     A would appear as magnitude -12.66


Component A:
Catalog numbers:
     Henry Draper (HD) 186408, Bonner Durchmusterung (BD) +50°2847, Hipparcos Input Catalog (HIC) 96895, Smithsonian Astrophysical Observatory (SAO) 31898, Hoffleit Bright Star (HR) 7503
Spectral class: G2
Luminosity Class: V
Apparent visual magnitude: +5.96
Absolute visual magnitude: +4.29
Visual luminosity: 1.68 x Sol
Color indices: B-V= +0.64, U-B= +0.19
Diameter: 1.44 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.30 A.U.s
Angular size of star in sky in CZ: 0.592528 degrees


Component B:
Catalog numbers:
     Henry Draper (HD) 186427, Bonner Durchmusterung (BD) +50°2848, Hipparcos Input Catalog (HIC) 96901, Smithsonian Astrophysical Observatory (SAO) 31899, Hoffleit Bright Star (HR) 7504
Right Ascension and Declination: 19h41m51.94s, +50°31'3.3" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: 19.3, -40.5, 54.4
Galactic (X,Y,Z) coordinates in ly: 7.72, 68.3, 15.9
Proper motion: 0.211 arcsec/yr (221.5° from north)
Radial Velocity: -28.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 17.6, -30.7, -1.25
Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +6.21
Absolute visual magnitude: +4.54
Visual luminosity: 1.33 x Sol
Color indices: B-V= +0.66, U-B= +0.20
Diameter: 1.19 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.15 A.U.s
Angular size of star in sky in CZ: 0.547886 degrees
Detected companions: 1
Companion b:
     Mass: 1.5 x Jupiter, minimum
     Period: 2.201 years
     Semimajor Axis: 1.72 A.U.s
     Eccentricity: 0.67
     Periastron distance: 0.5676 A.U.s
     Apastron distance: 2.8724 A.U.s
     Source for orbit data: Marcy & Butler

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