Bonner Durchmusterung +67°935

light-years

Catalog numbers:
     Gliese (Gl) 617, Henry Draper (HD) 147379, Bonner Durchmusterung (BD) +67°935, Hipparcos Input Catalog (HIC) 79755, Smithsonian Astrophysical Observatory (SAO) 17026, Vyssotsky McCormick (McC) 162, New Suspected Variable (NSV) 7624
Arity: binary
Right Ascension and Declination: 16h16m42.83s, +67°14'19.9" (epoch 2000.0)
Distance from Sol: 34.8 light-years (10.7 parsecs)
Standard error in distance: 1.2737%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -5.86, -12.1, 32.1
Galactic (X,Y,Z) coordinates in ly: -4.54, 26.4, 22.1
Proper motion: 0.51 arcsec/yr (280.3° from north)
Radial Velocity: -19.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -9.83, -30.8, 3.56

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +8.32
Combined visual luminosity: 0.041 x Sol
Observed Separation: 714 A.U.s
As seen from A:
     B would appear as magnitude -6.72
As seen from B:
     A would appear as magnitude -8.83


Component A:
Catalog numbers:
     Giclas (G) 225-57, Luyten Half-Second (LHS) 3175
Spectral class: M0e
Luminosity Class: V
Apparent visual magnitude: +8.61
Absolute visual magnitude: +8.47
Visual luminosity: 0.036 x Sol
Color indices: B-V= +1.41, U-B= +1.26, R-I= +0.68
Diameter: 0.72 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.19 A.U.s
Angular size of star in sky in CZ: 2.038446 degrees


Component B:
Catalog numbers:
     Giclas (G) 225-58, Luyten Half-Second (LHS) 3176
Right Ascension and Declination: 16h16m39s, +67°22'36" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -5.83, -12.0, 32.1
Galactic (X,Y,Z) coordinates in ly: -4.62, 26.4, 22.1
Proper motion: 0.522 arcsec/yr (278.6° from north)
Radial Velocity: -19.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -9.45, -31.1, 4.54
Spectral class: M2.5
Luminosity Class: V
Apparent visual magnitude: +10.72
Absolute visual magnitude: +10.58
Visual luminosity: 0.0051 x Sol
Color indices: B-V= +1.49, U-B= +1.13, R-I= +1.08
Diameter: 0.47 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.071 A.U.s
Angular size of star in sky in CZ: 3.508550 degrees

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