Gliese 745

light-years

Catalog numbers:
     Gliese (Gl) 745, Henry Draper Extension (HDE) 349726, Hipparcos Input Catalog (HIC) 93899
Arity: binary
Right Ascension and Declination: 19h4m58s, +20°48'48" (epoch 1950.0)
Distance from Sol: 28.9 light-years (8.86 parsecs)
Standard error in distance: 2.0915%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 7.56, -25.9, 10.3
Galactic (X,Y,Z) coordinates in ly: 17.2, 23.1, 3.06
Proper motion: 0.578 arcsec/yr (234.7° from north)
Radial Velocity: 32.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 35.6, 11.8, 14.6

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +10.26
Combined visual luminosity: 0.0068 x Sol
Observed Separation: 948 A.U.s
As seen from A:
     B would appear as magnitude -5.67
As seen from B:
     A would appear as magnitude -5.66


Component A:
Catalog numbers:
     Catalogue Astrographique (AC) +20°1463-148, Giclas (G) 184-48, Luyten Half-Second (LHS) 3432
Spectral class: M2
Luminosity Class: VI
Apparent visual magnitude: +10.76
Absolute visual magnitude: +11.02
Visual luminosity: 0.0034 x Sol
Color indices: B-V= +1.58, R-I= +0.93
Comfort Zone (visual): 0.058 A.U.s


Component B:
Catalog numbers:
     Catalogue Astrographique (AC) +20°1463-154, Giclas (G) 184-49, Luyten Half-Second (LHS) 3433
Right Ascension and Declination: 19h7m13.23s, +20°52'36.9" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: 7.81, -25.9, 10.3
Galactic (X,Y,Z) coordinates in ly: 17.1, 23.2, 2.84
Proper motion: 0.578 arcsec/yr (234.7° from north)
Radial Velocity: 31.7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 35.4, 11.7, 14.3
Spectral class: M2
Luminosity Class: VI
Apparent visual magnitude: +10.75
Absolute visual magnitude: +11.01
Visual luminosity: 0.0034 x Sol
Color indices: B-V= +1.58, R-I= +0.93
Comfort Zone (visual): 0.059 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.