Bonner Durchmusterung -11°3246

light-years

Catalog numbers:
     Woolley (Wo) 9390, Henry Draper (HD) 105590, Bonner Durchmusterung (BD) -11°3246, Hipparcos Input Catalog (HIC) 59272, Smithsonian Astrophysical Observatory (SAO) 157111, Aitken Double Star (ADS) 8440, New Suspected Variable (NSV) 5478
Arity: binary
Right Ascension and Declination: 12h9m28.53s, -11°51'25.5" (epoch 2000.0)
Distance from Sol: 74 light-years (23 parsecs)
Standard error in distance: 13.7255%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: -72, -3.0, -15
Galactic (X,Y,Z) coordinates in ly: 15, -46, 56
Proper motion: 0.355 arcsec/yr (118.8° from north)
Radial Velocity: 4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 38, 1.7, -3.5

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +4.91
Combined visual luminosity: 0.9 x Sol
Observed Separation: 250 A.U.s
As seen from A:
     B would appear as magnitude -12.17
As seen from B:
     A would appear as magnitude -14.56


Component A:
NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Catalog numbers:
     Luyten Two-Tenth (LTT) 4545
Spectral class: G2
Luminosity Class: V
Apparent visual magnitude: +6.81
Absolute visual magnitude: +5.03
Visual luminosity: 0.8 x Sol
Diameter: 0.98 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.9 A.U.s
Angular size of star in sky in CZ: 0.566889 degrees


Component B:
Catalog numbers:
     Luyten Two-Tenth (LTT) 4546
Right Ascension and Declination: 12h6m55s, -11°34'30" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -73, -2.2, -15
Galactic (X,Y,Z) coordinates in ly: 14, -46, 57
Proper motion: 0.355 arcsec/yr (118.8° from north)
Radial Velocity: 2.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 38, 2.2, -4.0
Spectral class: K5
Luminosity Class: V
Apparent visual magnitude: +9.20
Absolute visual magnitude: +7.42
Visual luminosity: 0.09 x Sol
Diameter: 0.75 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.3 A.U.s
Angular size of star in sky in CZ: 1.304238 degrees

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