What do all these fields mean?
Data for A and B's orbit around one other:
Combined absolute visual magnitude: +2.12
Combined visual luminosity: 12.3 x Sol
Period: 49.8 years
Semimajor Axis: 17.8 A.U.s
Eccentricity: 0.24
Periastron distance: 13.5 A.U.s
Apastron distance: 22.1 A.U.s
Year in which periastron occurs: 1939.7
Source for orbit data: G. Van Biesbroeck
As seen from A:
At periastron, B would appear as magnitude -21.10
At apastron, B would appear as magnitude -20.04
As seen from B:
At periastron, A would appear as magnitude -23.70
At apastron, A would appear as magnitude -22.64
Data for (A-B) and C's orbit around one other:
Combined absolute visual magnitude: +2.12
Combined visual luminosity: 12.3 x Sol
Period: 45000 years
Observed Separation: 1841 A.U.s
Source for orbit data: Burnham's Celestial Handbook
As seen from (A-B):
C would appear as magnitude -4.85
As seen from C:
(A-B) would appear as magnitude -13.12
Component A:
Spectral class: F0
Luminosity Class: IV
Apparent visual magnitude: +3.82 (increasing to +3.72)
Absolute visual magnitude: +2.22 (increasing to +2.12)
Visual luminosity: 11.3 x Sol (increasing to 12.4 x Sol)
Variable type: delta Scuti (pulsating variable)
Color indices: B-V= +0.38, U-B= +0.03
Diameter: 3.60 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 3.36 A.U.s
Angular size of star in sky in CZ: 0.570449 degrees
Component B:
Spectral class: G0
Luminosity Class: V
Apparent visual magnitude: +6.42
Absolute visual magnitude: +4.82
Visual luminosity: 1.03 x Sol
Color indices: B-V= +0.60, U-B= +0.09
Diameter: 0.96 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.02 A.U.s
Angular size of star in sky in CZ: 0.504100 degrees
Component C:
Catalog numbers:
Giclas (G) 211-14, Luyten (L) 1577-19
Right Ascension and Declination: 21h12m47s, +37°48'24" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 40.2, -35.9, 41.8
Galactic (X,Y,Z) coordinates in ly: 8.44, 67.1, -8.85
Proper motion: 0.463 arcsec/yr (19.8° from north)
Radial Velocity: -23.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -44.3, -15.1, 21.3
Spectral class: M3
Luminosity Class: V
Apparent visual magnitude: +12.00
Absolute visual magnitude: +10.40
Visual luminosity: 0.0060 x Sol
Color indices: B-V= +1.53, U-B= +1.14, R-I= +1.04
Diameter: 0.46 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.078 A.U.s
Angular size of star in sky in CZ: 3.155426 degrees