Gliese & Jahreiss 2128

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 2128, Giclas (G) 139-27, Hipparcos Input Catalog (HIC) 84521, Luyten Two-Tenth (LTT) 15114
Arity: singular
Right Ascension and Declination: 17h16m40.951s, +8°3'29.75" (epoch 2000.0)
Distance from Sol: 48.7 light-years (14.9 parsecs)
Standard error in distance: 4.0986%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -9.07, -47.4, 6.83
Galactic (X,Y,Z) coordinates in ly: 38.7, 22.0, 19.9
Proper motion: 0.277 arcsec/yr (256.0° from north)
Source for proper motion: Gliese

What do all these fields mean?


Spectral class: M3.5
Luminosity Class: V-VI
Apparent visual magnitude: +11.49
Absolute visual magnitude: +10.62
Visual luminosity: 0.0049 x Sol
Color indices: B-V= +1.55, U-B= +1.23, R-I= +1.00
Comfort Zone (visual): 0.070 A.U.s

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