AX Microscopii

light-years
Proper names: AX Microscopii
Catalog numbers:
     Gliese (Gl) 825, Henry Draper (HD) 202560, Cordoba Durchmusterung (CD) -3914192, Luyten Half-Second (LHS) 66, Hipparcos Input Catalog (HIC) 105090, Smithsonian Astrophysical Observatory (SAO) 212866, UGPMF 518, Lacaille (Lac) 8760
Arity: singular
Points of interest:
     As flare stars go, AX Microscopii is pretty mild, emitting flares less than once per day. This, combined with the high eccentricity and inclination of its orbit around the galactic center, implies that the star is older than our own Sun.

Right Ascension and Declination: 21h17m15.267s, -38°52'2.94" (epoch 2000.0)
Distance from Sol: 12.87 light-years (3.947 parsecs)
Standard error in distance: 0.444%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 7.600, -6.534, -8.078
Galactic (X,Y,Z) coordinates in ly: 9.097, 0.673, -9.080
Proper motion: 3.453 arcsec/yr (250.8° from north)
Radial Velocity: 28.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 64.07, -18.50, 22.85

What do all these fields mean?


Spectral class: M0e
Luminosity Class: V
Apparent visual magnitude: +6.69 (increasing to +6.49)
Absolute visual magnitude: +8.70 (increasing to +8.50)
Visual luminosity: 0.0287 x Sol (increasing to 0.0345 x Sol)
Variable type: UV Ceti flare star (eruptive variable)
Color indices: B-V= +1.41, U-B= +1.21, R-I= +0.69
Mass: 0.54 x Sol
Diameter: 0.653 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.169 A.U.s
Orbital period in CZ: 34.6658 days
Tidal index in CZ: 111.014
Angular size of star in sky in CZ: 2.055330 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 26-April-2003.