Mu Arae

light-years
Proper names: Mu Arae
Catalog numbers:
     Gliese (Gl) 691, Henry Draper (HD) 160691, Cordoba Durchmusterung (CD) -51°11094, Hipparcos Input Catalog (HIC) 86796, Smithsonian Astrophysical Observatory (SAO) 244981, Fifth Fundamental Catalogue (FK5) 662, Hoffleit Bright Star (HR) 6585
Heavy element abundance: 182% of Sol
Standard error in heavy element abundance: 20%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: singular
Right Ascension and Declination: 17h44m8.704s, -51°50'2.68" (epoch 2000.0)
Distance from Sol: 49.8 light-years (15.3 parsecs)
Standard error in distance: 1.2074%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -2.13, -30.7, -39.2
Galactic (X,Y,Z) coordinates in ly: 45.9, -16.4, -10.4
Proper motion: 0.192 arcsec/yr (183.9° from north)
Radial Velocity: -9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -13.7, -8.45, -3.97

What do all these fields mean?


Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +5.13
Absolute visual magnitude: +4.21
Visual luminosity: 1.81 x Sol
Color indices: B-V= +0.70, U-B= +0.24, R-I= +0.20
Diameter: 1.43 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.34 A.U.s
Angular size of star in sky in CZ: 0.566286 degrees
Detected companions: 1
Companion b:
     Mass: 1.97 x Jupiter, minimum
     Source for mass: Marcy, Butler, et al.
     Period: 2.0342 years
     Semimajor Axis: 1.65 A.U.s
     Eccentricity: 0.62
     Periastron distance: 0.627 A.U.s
     Apastron distance: 2.673 A.U.s
     Source for orbit data: Marcy, Butler, et al.

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