Bonner Durchmusterung +74°456

light-years

Catalog numbers:
     Gliese (Gl) 420, Henry Draper (HD) 97584, Bonner Durchmusterung (BD) +74°456, Giclas (G) 254-18, Hipparcos Input Catalog (HIC) 54952, Smithsonian Astrophysical Observatory (SAO) 7320, Aitken Double Star (ADS) 8100, Vyssotsky McCormick (McC) 603, AGK3 Reference (AGK3R) 10078
Arity: binary
Right Ascension and Declination: 11h15m11.937s, +73°28'30.67" (epoch 2000.0)
Distance from Sol: 47.9 light-years (14.7 parsecs)
Standard error in distance: 1.7025%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -13.4, 2.64, 45.9
Galactic (X,Y,Z) coordinates in ly: -23.6, 26.4, 32.2
Proper motion: 0.417 arcsec/yr (284.9° from north)
Radial Velocity: 8.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -28.6, 0.42, -9.31

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +6.81
Combined visual luminosity: 0.16 x Sol
Observed Separation: 103 A.U.s
As seen from A:
     B would appear as magnitude -10.95
As seen from B:
     A would appear as magnitude -14.67


Component A:
Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +7.68
Absolute visual magnitude: +6.85
Visual luminosity: 0.16 x Sol
Color indices: B-V= +1.06, U-B= +0.92, R-I= +0.40
Diameter: 0.75 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.40 A.U.s
Angular size of star in sky in CZ: 1.002852 degrees


Component B:
Proper motion: 0.417 arcsec/yr (284.9° from north)
Radial Velocity: 8.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -28.9, 0.70, -8.97
Spectral class: M2
Luminosity Class: V
Apparent visual magnitude: +11.40
Absolute visual magnitude: +10.57
Visual luminosity: 0.0052 x Sol
Diameter: 0.44 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.072 A.U.s
Angular size of star in sky in CZ: 3.263360 degrees

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