V774 Herculis

light-years
Proper names: V774 Herculis
Catalog numbers:
     Gliese (Gl) 718, Henry Draper (HD) 171314, Bonner Durchmusterung (BD) +22°3406, Giclas (G) 183-44, Luyten Half-Second (LHS) 3392, Hipparcos Input Catalog (HIC) 90959, Smithsonian Astrophysical Observatory (SAO) 86187, Vyssotsky McCormick (McC) 803
Arity: singular
Right Ascension and Declination: 18h33m17.761s, +22°18'51.23" (epoch 2000.0)
Distance from Sol: 76.4 light-years (23.4 parsecs)
Standard error in distance: 2.8682%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 10.2, -70.0, 29.0
Galactic (X,Y,Z) coordinates in ly: 46.3, 58.2, 17.7
Proper motion: 0.51 arcsec/yr (200.9° from north)
Radial Velocity: 38.8 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 68.3, -5.08, 5.55

What do all these fields mean?


Spectral class: K4
Luminosity Class: V
Apparent visual magnitude: +8.90 (increasing to +8.30)
Absolute visual magnitude: +7.05 (increasing to +6.45)
Visual luminosity: 0.13 x Sol (increasing to 0.23 x Sol)
Variable type: UV Ceti flare star (eruptive variable)
Color indices: B-V= +1.12, U-B= +1.05, R-I= +0.42
Diameter: 0.68 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.36 A.U.s
Angular size of star in sky in CZ: 0.998783 degrees

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