Ross 248


Catalog numbers:
     Gliese (Gl) 905, Giclas (G) 171-10, Luyten Half-Second (LHS) 549, Ross 248
Arity: singular
Right Ascension and Declination: 23h39m26s, +43°55'12" (epoch 1950.0)
Distance from Sol: 10.33 light-years (3.169 parsecs)
Standard error in distance: 0.5044%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 7.414, -0.667, 7.169
Galactic (X,Y,Z) coordinates in ly: -3.382, 9.291, -3.008
Proper motion: 1.617 arcsec/yr (177.0° from north)
Radial Velocity: -77.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 32.95, -74.44, -0.0179

What do all these fields mean?

Spectral class: M5.5e
Luminosity Class: V
Apparent visual magnitude: +12.29
Absolute visual magnitude: +14.79
Visual luminosity: 0.000106 x Sol
Color indices: B-V= +1.90, U-B= +1.48, R-I= +1.55
Mass: 0.07 x Sol
Diameter: 0.17 x Sol
Comfort Zone (visual): 0.0103 A.U.s
Orbital period in CZ: 1.44274 days
Tidal index in CZ: 64091.8
Angular size of star in sky in CZ: 8.800378 degrees

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