Eta Scorpii

light-years
Proper names: Eta Scorpii
Catalog numbers:
     Gliese (Gl) 657, Henry Draper (HD) 155203, Cordoba Durchmusterung (CD) -43°11485, Hipparcos Input Catalog (HIC) 84143, Smithsonian Astrophysical Observatory (SAO) 227707, Fifth Fundamental Catalogue (FK5) 638, Hoffleit Bright Star (HR) 6380
Arity: singular
Right Ascension and Declination: 17h12m9.209s, -43°14'20.99" (epoch 2000.0)
Distance from Sol: 71.6 light-years (21.9 parsecs)
Standard error in distance: 1.7044%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -10.8, -51.0, -49.0
Galactic (X,Y,Z) coordinates in ly: 69.0, -18.9, -3.58
Proper motion: 0.288 arcsec/yr (175.4° from north)
Radial Velocity: -27 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -33.0, -14.6, -18.1

What do all these fields mean?


Spectral class: F0n
Luminosity Class: IV
Apparent visual magnitude: +3.32
Absolute visual magnitude: +1.61
Visual luminosity: 19.7 x Sol
Color indices: B-V= +0.41, U-B= +0.09, R-I= +0.23
Diameter: 3.07 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 4.44 A.U.s
Angular size of star in sky in CZ: 0.368498 degrees

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