Chi Herculis

light-years
Proper names: Chi Herculis, 1 Herculis
Catalog numbers:
     Gliese (Gl) 602, Henry Draper (HD) 142373, Bonner Durchmusterung (BD) +42°2648, Luyten Half-Second (LHS) 3127, Hipparcos Input Catalog (HIC) 77760, Smithsonian Astrophysical Observatory (SAO) 45772, Fifth Fundamental Catalogue (FK5) 1416, Hoffleit Bright Star (HR) 5914
Age: 8000 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Heavy element abundance: 44% of Sol
Standard error in heavy element abundance: 6%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Points of interest:
     B. Edvardsson et al. give an age of over 13 thousand-million years for this star, which is probably too old; an F9 star can only remain on the main sequence for about 9-10 thousand-million years.

Right Ascension and Declination: 15h52m40.542s, +42°27'5.64" (epoch 2000.0)
Distance from Sol: 51.71 light-years (15.85 parsecs)
Standard error in distance: 0.8488%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -20.12, -32.41, 34.90
Galactic (X,Y,Z) coordinates in ly: 12.77, 30.67, 39.63
Proper motion: 0.765 arcsec/yr (35.0° from north)
Radial Velocity: -56.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -42.12, 10.15, -67.89

What do all these fields mean?


Spectral class: F9
Luminosity Class: V
Apparent visual magnitude: +4.62
Absolute visual magnitude: +3.62
Visual luminosity: 3.103 x Sol
Color indices: B-V= +0.57, U-B= +0.00, R-I= +0.21
Diameter: 2.726 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.762 A.U.s
Angular size of star in sky in CZ: 0.824956 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 12-May-2001.