Gliese & Jahreiss 1047

light-years

Catalog numbers:
     Gliese & Jahreiss (GJ) 1047, Giclas (G) 74-19, Luyten Half-Second (LHS) 1393
Arity: trinary
Right Ascension and Declination: 2h17m59s, +36°39'47" (epoch 1950.0)
Distance from Sol: 70.4 light-years (21.6 parsecs)
Standard error in distance: 7.2144%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 46.6, 32.0, 42.1
Galactic (X,Y,Z) coordinates in ly: -51.4, 39.8, -27.1
Proper motion: 0.919 arcsec/yr (128.3° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +11.63
Combined visual luminosity: 0.0019 x Sol
Observed Separation: 21.6 A.U.s
As seen from A:
     B would appear as magnitude -12.52
As seen from B:
     A would appear as magnitude -12.52

Data for (A-B) and C's orbit around one other:
Combined absolute visual magnitude: +11.25
Combined visual luminosity: 0.0028 x Sol
Observed Separation: 691 A.U.s
As seen from (A-B):
     C would appear as magnitude -4.79
As seen from C:
     (A-B) would appear as magnitude -5.75


Component A:
Spectral class: M
Luminosity Class: V-VI
Apparent visual magnitude: +14.05
Absolute visual magnitude: +12.38
Visual luminosity: 0.00097 x Sol
Comfort Zone (visual): 0.031 A.U.s


Component B:
Spectral class: M
Luminosity Class: V-VI
Apparent visual magnitude: +14.05
Absolute visual magnitude: +12.38
Visual luminosity: 0.00097 x Sol
Comfort Zone (visual): 0.031 A.U.s


Component C:
Catalog numbers:
     Luyten Half-Second (LHS) 1392, Giclas (G) 74-18
Right Ascension and Declination: 2h17m57s, +36°39'30" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 46.6, 32.0, 42.1
Galactic (X,Y,Z) coordinates in ly: -51.4, 39.9, -27.1
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +14.26
Absolute visual magnitude: +12.59
Visual luminosity: 0.00080 x Sol
Color indices: B-V= +1.70, U-B= +1.50, R-I= +1.16
Comfort Zone (visual): 0.028 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.