Cordoba Durchmusterung -39°7301

light-years

Catalog numbers:
     Gliese (Gl) 442, Henry Draper (HD) 102365, Cordoba Durchmusterung (CD) -39°7301, Hipparcos Input Catalog (HIC) 57443, Smithsonian Astrophysical Observatory (SAO) 223020, Hoffleit Bright Star (HR) 4523
Heavy element abundance: 27% of Sol
Standard error in heavy element abundance: 24%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: binary
Right Ascension and Declination: 11h46m31.053s, -40°30'1.76" (epoch 2000.0)
Distance from Sol: 30.14 light-years (9.240 parsecs)
Standard error in distance: 0.6426%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -22.88, 1.347, -19.57
Galactic (X,Y,Z) coordinates in ly: 9.825, -26.45, 10.59
Proper motion: 1.587 arcsec/yr (284.4° from north)
Radial Velocity: 15.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -60.11, -37.78, 4.926

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.07
Combined visual luminosity: 0.815 x Sol
Observed Separation: 194.0 A.U.s
As seen from A:
     B would appear as magnitude -4.96
As seen from B:
     A would appear as magnitude -15.06


Component A:
Catalog numbers:
     Luyten Half-Second (LHS) 311
Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +4.90
Absolute visual magnitude: +5.07
Visual luminosity: 0.815 x Sol
Color indices: B-V= +0.66, U-B= +0.10, R-I= +0.22
Mass: 1 x Sol
Diameter: 0.963 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.903 A.U.s
Orbital period in CZ: 313.376 days
Tidal index in CZ: 1.35847
Angular size of star in sky in CZ: 0.568718 degrees


Component B:
Catalog numbers:
     Luyten Half-Second (LHS) 313, VB 5
Right Ascension and Declination: 11h44m9s, -40°13'24" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -22.95, 1.590, -19.46
Galactic (X,Y,Z) coordinates in ly: 9.564, -26.51, 10.66
Proper motion: 1.592 arcsec/yr (284.4° from north)
Radial Velocity: 15.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -60.59, -37.50, 4.309
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +15.00
Absolute visual magnitude: +15.17
Visual luminosity: 0.0000743 x Sol
Mass: 0.07 x Sol
Diameter: 0.15 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.00862 A.U.s
Orbital period in CZ: 1.10501 days
Tidal index in CZ: 109256
Angular size of star in sky in CZ: 9.275938 degrees

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