18 Scorpii

light-years
Proper names: 18 Scorpii
Catalog numbers:
     Gliese (Gl) 616, Henry Draper (HD) 146233, Bonner Durchmusterung (BD) -74242, Luyten Half-Second (LHS) 3171, Hipparcos Input Catalog (HIC) 79672, Smithsonian Astrophysical Observatory (SAO) 141066, Hoffleit Bright Star (HR) 6060, New Suspected Variable (NSV) 7577
Heavy element abundance: 105% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 16h15m37.29s, -8°22'10.1" (epoch 2000.0)
Distance from Sol: 45.7 light-years (14.0 parsecs)
Standard error in distance: 1.2329%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -19.9, -40.6, -6.66
Galactic (X,Y,Z) coordinates in ly: 40.0, 3.54, 21.9
Proper motion: 0.554 arcsec/yr (155.6° from north)
Radial Velocity: 12 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 27.5, -14.9, -22.8

What do all these fields mean?


Spectral class: G1
Luminosity Class: V
Apparent visual magnitude: +5.50
Absolute visual magnitude: +4.77
Visual luminosity: 1.08 x Sol
Color indices: B-V= +0.65, U-B= +0.16, R-I= +0.22
Diameter: 1.03 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.04 A.U.s
Angular size of star in sky in CZ: 0.528864 degrees

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