Bonner Durchmusterung +49°2959

light-years

Catalog numbers:
     Woolley (Wo) 9648, Bonner Durchmusterung (BD) +49°2959, Aitken Double Star (ADS) 12169
Age: 9800 million years — Barry gives the age for the B star as 10200 million years.
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: binary
Right Ascension and Declination: 19h12m5s, +49°51'22" (epoch 2000.0)
Distance from Sol: 81.2 light-years (24.9 parsecs)
Standard error in distance: 2.0249%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 16.2, -49.8, 62.1
Galactic (X,Y,Z) coordinates in ly: 12.3, 76.6, 23.9
Proper motion: 0.667 arcsec/yr (340.0° from north)
Radial Velocity: -39.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -65.9, -43.7, 39.1

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +3.92
Combined visual luminosity: 2.35 x Sol
Observed Separation: 274 A.U.s
As seen from A:
     B would appear as magnitude -14.62
As seen from B:
     A would appear as magnitude -14.80


Component A:
Catalog numbers:
     Henry Draper (HD) 179958, Luyten Half-Second (LHS) 3441, Smithsonian Astrophysical Observatory (SAO) 48193, Hoffleit Bright Star (HR) 7294, Luyten FT (LFT) 1459
Spectral class: G6
Luminosity Class: V
Apparent visual magnitude: +6.57
Absolute visual magnitude: +4.59
Visual luminosity: 1.27 x Sol
Color indices: B-V= +0.65, U-B= +0.21
Diameter: 1 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.13 A.U.s
Angular size of star in sky in CZ: 0.472725 degrees


Component B:
Catalog numbers:
     Henry Draper (HD) 179957, Luyten Half-Second (LHS) 3440, Hipparcos Input Catalog (HIC) 94336, Smithsonian Astrophysical Observatory (SAO) 48192, Hoffleit Bright Star (HR) 7293, Struve (STF) 2486, New Suspected Variable (NSV) 11823, Luyten FT (LFT) 1460
Right Ascension and Declination: 19h12m4.78s, +49°51'17.1" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: 16.2, -49.8, 62.1
Galactic (X,Y,Z) coordinates in ly: 12.3, 76.6, 23.9
Proper motion: 0.668 arcsec/yr (343.7° from north)
Radial Velocity: -41.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -69.3, -43.4, 35.0
Spectral class: G6
Luminosity Class: V
Apparent visual magnitude: +6.75
Absolute visual magnitude: +4.77
Visual luminosity: 1.08 x Sol
Color indices: B-V= +0.65, U-B= +0.19
Diameter: 0.97 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.04 A.U.s
Angular size of star in sky in CZ: 0.498175 degrees

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