Bonner Durchmusterung +39°2947

light-years

Catalog numbers:
     Gliese (Gl) 611, Henry Draper (HD) 144579, Bonner Durchmusterung (BD) +39°2947, Hipparcos Input Catalog (HIC) 78775, Smithsonian Astrophysical Observatory (SAO) 65065, AGK3 Reference (AGK3R) 14350
Age: 8700 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: binary
Right Ascension and Declination: 16h4m56.79s, +39°9'23.32" (epoch 2000.0)
Distance from Sol: 46.86 light-years (14.37 parsecs)
Standard error in distance: 0.8122%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -17.48, -31.85, 29.59
Galactic (X,Y,Z) coordinates in ly: 14.67, 27.76, 34.78
Proper motion: 0.579 arcsec/yr (275.0° from north)
Radial Velocity: -60 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -35.98, -59.38, -18.27

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.87
Combined visual luminosity: 0.390 x Sol
Observed Separation: 1020 A.U.s
As seen from A:
     B would appear as magnitude -3.09
As seen from B:
     A would appear as magnitude -10.66


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 3152
Spectral class: G8
Luminosity Class: V
Apparent visual magnitude: +6.66
Absolute visual magnitude: +5.87
Visual luminosity: 0.390 x Sol
Color indices: B-V= +0.73, U-B= +0.21
Diameter: 0.83 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.624 A.U.s
Angular size of star in sky in CZ: 0.708888 degrees


Component B:
Catalog numbers:
     Giclas (G) 180-27, Luyten Half-Second (LHS) 3150
Right Ascension and Declination: 16h3m7s, +39°17'36" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -17.70, -31.65, 29.67
Galactic (X,Y,Z) coordinates in ly: 14.46, 27.62, 34.98
Proper motion: 0.624 arcsec/yr (274.5° from north)
Radial Velocity: -60 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -37.01, -61.31, -16.66
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +14.23
Absolute visual magnitude: +13.44
Visual luminosity: 0.000365 x Sol
Color indices: B-V= +1.72, R-I= +1.25
Comfort Zone (visual): 0.0191 A.U.s

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