Bonner Durchmusterung +26°484

light-years

Catalog numbers:
     Gliese (Gl) 118.2, Henry Draper (HD) 18143, Bonner Durchmusterung (BD) +26°484, Giclas (G) 36-44, Hipparcos Input Catalog (HIC) 13642, Smithsonian Astrophysical Observatory (SAO) 75644, Aitken Double Star (ADS) 2218, Woolley (Wo) 9105
Arity: trinary
Right Ascension and Declination: 2h55m39.04s, +26°52'23.9" (epoch 2000.0)
Distance from Sol: 74.6 light-years (22.9 parsecs)
Standard error in distance: 2.8019%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 48.0, 46.2, 33.7
Galactic (X,Y,Z) coordinates in ly: -59.8, 27.9, -34.8
Proper motion: 0.324 arcsec/yr (124.6° from north)
Radial Velocity: 31.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -39.6, -20.2, -16.3

What do all these fields mean?

Data for and C's orbit around one other:
Combined absolute visual magnitude: +12.06
Combined visual luminosity: 0.0013 x Sol
Observed Separation: 915 A.U.s
As seen from :
     C would appear as magnitude -4.70


Component A:
Spectral class: K2
Luminosity Class: V
Apparent visual magnitude: +7.60
Absolute visual magnitude: +5.80
Visual luminosity: 0.42 x Sol
Color indices: B-V= +0.93, U-B= +0.71, R-I= +0.30
Diameter: 0.85 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.64 A.U.s
Angular size of star in sky in CZ: 0.702792 degrees


Component B:
Proper motion: 0.324 arcsec/yr (124.6° from north)
Radial Velocity: 27 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -35.8, -22.0, -14.1
Spectral class: M0
Luminosity Class: V
Apparent visual magnitude: +9.80
Absolute visual magnitude: +8.00
Visual luminosity: 0.055 x Sol
Color indices: B-V= +1.40, U-B= +1.50
Diameter: 0.68 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.23 A.U.s
Angular size of star in sky in CZ: 1.548596 degrees


Component C:
Catalog numbers:
     Giclas (G) 36-43, Luyten (L) 1378-26
Right Ascension and Declination: 2h52m38s, +26°40'17" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 48.6, 45.6, 33.5
Galactic (X,Y,Z) coordinates in ly: -59.3, 28.4, -35.4
Proper motion: 0.322 arcsec/yr (125.0° from north)
Radial Velocity: 31.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -39.3, -19.8, -17.1
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +13.86
Absolute visual magnitude: +12.06
Visual luminosity: 0.0013 x Sol
Color indices: B-V= +1.58, U-B= +1.17, R-I= +1.25
Diameter: 0.32 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.036 A.U.s
Angular size of star in sky in CZ: 4.727365 degrees

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