37 Geminorum

light-years
Proper names: 37 Geminorum
Catalog numbers:
     Gliese (Gl) 252, Henry Draper (HD) 50692, Bonner Durchmusterung (BD) +25°1496, Hipparcos Input Catalog (HIC) 33277, Smithsonian Astrophysical Observatory (SAO) 78866, Hoffleit Bright Star (HR) 2569
Age: 5500 million years
Source for age: Don C. Barry, "Chromospheric Age Dependence of…", APJ 334
Arity: singular
Right Ascension and Declination: 6h55m18.637s, +25°22'32.65" (epoch 2000.0)
Distance from Sol: 56.3 light-years (17.3 parsecs)
Standard error in distance: 1.5309%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -12.2, 49.4, 24.1
Galactic (X,Y,Z) coordinates in ly: -54.0, -10.3, 12.4
Proper motion: 0.049 arcsec/yr (301.8° from north)
Radial Velocity: -15.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 13.4, 5.95, -5.48

What do all these fields mean?


Spectral class: G0
Luminosity Class: V
Apparent visual magnitude: +5.73
Absolute visual magnitude: +4.54
Visual luminosity: 1.33 x Sol
Color indices: B-V= +0.57, U-B= +0.00, R-I= +0.22
Mass: 1.1 x Sol
Diameter: 1.03 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.15 A.U.s
Orbital period in CZ: 1.18196 years
Tidal index in CZ: 0.715804
Angular size of star in sky in CZ: 0.475834 degrees

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