Pi Hydrae

light-years
Proper names: Pi Hydrae, 49 Hydrae
Catalog numbers:
     Gliese (Gl) 538.1, Henry Draper (HD) 123123, Cordoba Durchmusterung (CD) -26°10095, Hipparcos Input Catalog (HIC) 68895, Smithsonian Astrophysical Observatory (SAO) 182244, Fifth Fundamental Catalogue (FK5) 519, Hoffleit Bright Star (HR) 5287, Woolley (Wo) 9466
Heavy element abundance: 115% of Sol
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 14h6m22.3s, -26°40'56.52" (epoch 2000.0)
Distance from Sol: 101 light-years (31.1 parsecs)
Standard error in distance: 2.3376%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -77.2, -47.5, -45.5
Galactic (X,Y,Z) coordinates in ly: 68.6, -50.5, 54.9
Proper motion: 0.15 arcsec/yr (162.9° from north)
Radial Velocity: 27.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 27.3, -21.7, -3.75

What do all these fields mean?


Spectral class: K2
Luminosity Class: III
Apparent visual magnitude: +3.27
Absolute visual magnitude: +0.80
Visual luminosity: 41.6 x Sol
Color indices: B-V= +1.12, U-B= +1.04, R-I= +0.40
Diameter: 16.4 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 6.45 A.U.s
Angular size of star in sky in CZ: 1.352943 degrees

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