What do all these fields mean?
Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.60
Combined visual luminosity: 0.50 x Sol
Period: 137 years
Semimajor Axis: 34.8 A.U.s
Eccentricity: 0.67
Periastron distance: 11.5 A.U.s
Apastron distance: 58.1 A.U.s
Year in which periastron occurs: 1874.76
Source for orbit data: W.H. van den Bos
As seen from A:
At periastron, B would appear as magnitude -19.83
At apastron, B would appear as magnitude -16.31
As seen from B:
At periastron, A would appear as magnitude -20.00
At apastron, A would appear as magnitude -16.48
Data for Ca and Cb's orbit around one other:
Combined spectrum: K2 V
Combined apparent visual magnitude: +7.84
Combined absolute visual magnitude: +6.08
Combined visual luminosity: 0.32 x Sol
Period: 1.5186 years
Semimajor Axis: 0.9 A.U.s
Eccentricity: 0.54
Periastron distance: 0.414 A.U.s
Apastron distance: 1.386 A.U.s
Source for orbit data: Duquennoy & Mayor (1991)
Data for (A-B) and (Ca-Cb)'s orbit around one other:
Combined absolute visual magnitude: +5.06
Combined visual luminosity: 0.82 x Sol
Observed Separation: 643 A.U.s
As seen from (A-B):
(Ca-Cb) would appear as magnitude -11.45
As seen from (Ca-Cb):
(A-B) would appear as magnitude -11.93
Component A:
Spectral class: K1-2
Luminosity Class: V
Apparent visual magnitude: +8.03
Absolute visual magnitude: +6.27
Visual luminosity: 0.27 x Sol
Comfort Zone (visual): 0.52 A.U.s
Component B:
Apparent visual magnitude: +8.20
Absolute visual magnitude: +6.44
Visual luminosity: 0.23 x Sol
Comfort Zone (visual): 0.48 A.U.s
Component Ca:
Catalog numbers:
Henry Draper (HD) 18445, Cordoba Durchmusterung (CD) -25°1168, Hipparcos Input Catalog (HIC) 13769, Smithsonian Astrophysical Observatory (SAO) 168180, Southern Reference System (SRS) 4766
Right Ascension and Declination: 2h57m12.95s, -24°58'29.8" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: 47.6, 46.4, -31.0
Galactic (X,Y,Z) coordinates in ly: -28.7, -20.5, -64.3
Proper motion: 0.039 arcsec/yr (145.9° from north)
Radial Velocity: 49.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -18.3, -17.8, -42.7
Component Cb:
Catalog numbers:
Henry Draper (HD) 18445, Cordoba Durchmusterung (CD) -25°1168, Hipparcos Input Catalog (HIC) 13769, Smithsonian Astrophysical Observatory (SAO) 168180, Southern Reference System (SRS) 4766
Right Ascension and Declination: 2h57m12.95s, -24°58'29.8" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: 47.6, 46.4, -31.0
Galactic (X,Y,Z) coordinates in ly: -28.7, -20.5, -64.3
Proper motion: 0.039 arcsec/yr (145.9° from north)
Radial Velocity: 49.6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -18.3, -17.8, -42.7