What do all these fields mean?
Data for A and B's orbit around one other:
Combined spectrum: F3 V
Combined absolute visual magnitude: +3.61
Combined visual luminosity: 3.1 x Sol
Period: 280.03 years
Semimajor Axis: 26 A.U.s
Eccentricity: 0.718
Periastron distance: 7.2 A.U.s
Apastron distance: 44 A.U.s
Year in which periastron occurs: 1829
Source for orbit data: S. Wierzbinski
As seen from A:
At periastron, B would appear as magnitude -22.52
At apastron, B would appear as magnitude -18.60
As seen from B:
At periastron, A would appear as magnitude -23.21
At apastron, A would appear as magnitude -19.29
Data for (A-B) and C's orbit around one other:
Combined absolute visual magnitude: +3.59
Combined visual luminosity: 3.2 x Sol
Observed Separation: 1720 A.U.s
Source for orbit data: Gliese
As seen from (A-B):
C would appear as magnitude -7.17
As seen from C:
(A-B) would appear as magnitude -11.79
Component A:
NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Catalog numbers:
Henry Draper (HD) 164765, Hoffleit Bright Star (HR) 6734
Apparent visual magnitude: +5.24
Absolute visual magnitude: +4.07
Visual luminosity: 2.1 x Sol
Diameter: 1.05 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.4 A.U.s
Angular size of star in sky in CZ: 0.390542 degrees
Component B:
Catalog numbers:
Henry Draper (HD) 164764, Hoffleit Bright Star (HR) 6733, New Suspected Variable (NSV) 10073
Proper motion: 0.046 arcsec/yr (147.1° from north)
Radial Velocity: -35.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -32, -14, -7.1
Apparent visual magnitude: +5.93
Absolute visual magnitude: +4.76
Visual luminosity: 1.1 x Sol
Diameter: 0.97 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.0 A.U.s
Angular size of star in sky in CZ: 0.495743 degrees
Component C:
Right Ascension and Declination: 18h0m27s, -8°11'54" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: 0.1, -55, -8.0
Galactic (X,Y,Z) coordinates in ly: 52, 19, 6.7
Proper motion: 0.05 arcsec/yr (147.0° from north)
Radial Velocity: -14 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -12, -6.4, -5.2
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +9.40
Absolute visual magnitude: +8.23
Visual luminosity: 0.04 x Sol
Diameter: 0.68 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.2 A.U.s
Angular size of star in sky in CZ: 1.718020 degrees