Nu Octantis

light-years
Proper names: Nu Octantis
Catalog numbers:
     Gliese (Gl) 835.1, Henry Draper (HD) 205478, Cape Photographic Durchmusterung (CPD) -77°1510, Hipparcos Input Catalog (HIC) 107089, Smithsonian Astrophysical Observatory (SAO) 257948, Fifth Fundamental Catalogue (FK5) 810, Hoffleit Bright Star (HR) 8254, Woolley (Wo) 9744
Arity: singular
Right Ascension and Declination: 21h41m28.548s, -77°23'24.18" (epoch 2000.0)
Distance from Sol: 69.1 light-years (21.2 parsecs)
Standard error in distance: 5.7861%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 12.4, -8.57, -67.4
Galactic (X,Y,Z) coordinates in ly: 39.2, -40.2, -40.2
Proper motion: 0.243 arcsec/yr (167.5° from north)
Radial Velocity: 34.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 7.82, -39.7, -11.7

What do all these fields mean?


NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Spectral class: K0
Luminosity Class: III
Apparent visual magnitude: +3.75
Absolute visual magnitude: +2.12
Visual luminosity: 12.4 x Sol
Color indices: B-V= +1.00, U-B= +0.89, R-I= +0.46
Diameter: 6.60 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 3.52 A.U.s
Angular size of star in sky in CZ: 1.000678 degrees

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