Bonner Durchmusterung +15°1957

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 1120, Henry Draper (HD) 77175, Bonner Durchmusterung (BD) +15°1957, Giclas (G) 9-43, Hipparcos Input Catalog (HIC) 44295, Smithsonian Astrophysical Observatory (SAO) 98293, Aitken Double Star (ADS) 7139, Vyssotsky McCormick (McC) 264
Arity: binary
Right Ascension and Declination: 9h1m17.48s, +15°15'53.4" (epoch 2000.0)
Distance from Sol: 59.8 light-years (18.3 parsecs)
Standard error in distance: 5.5556%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -41.0, 40.5, 15.7
Galactic (X,Y,Z) coordinates in ly: -40.2, -26.7, 35.2
Proper motion: 0.343 arcsec/yr (201.5° from north)
Radial Velocity: -12 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 9.59, -19.1, -24.0

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +7.39
Combined visual luminosity: 0.096 x Sol
Observed Separation: 75.1 A.U.s
Year of separation observation: 1830
As seen from A:
     B would appear as magnitude -14.02
As seen from B:
     A would appear as magnitude -14.08

Data for A and B's orbit, take 2:
Observed Separation: 95.3 A.U.s
Year of separation observation: 1955
As seen from A:
     B would appear as magnitude -13.50
As seen from B:
     A would appear as magnitude -13.56


Component A:
Spectral class: K5
Luminosity Class: V-VI
Apparent visual magnitude: +9.43
Absolute visual magnitude: +8.11
Visual luminosity: 0.049 x Sol
Comfort Zone (visual): 0.22 A.U.s


Component B:
Right Ascension and Declination: 8h58m31s, +15°27'54" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -40.5, 41.0, 15.9
Galactic (X,Y,Z) coordinates in ly: -40.8, -26.5, 34.7
Proper motion: 0.388 arcsec/yr (196.7° from north)
Radial Velocity: -12.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 12.4, -22.9, -24.9
Spectral class: K5
Luminosity Class: V-VI
Apparent visual magnitude: +9.49
Absolute visual magnitude: +8.17
Visual luminosity: 0.047 x Sol
Comfort Zone (visual): 0.22 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.