What do all these fields mean?
Data for A and B's orbit around one other:
Combined spectrum: K8 V
Combined absolute visual magnitude: +6.57
Combined visual luminosity: 0.21 x Sol
Comfort Zone (visual) around both: 0.45 A.U.s
Data for (A-B) and C's orbit around one other:
Combined absolute visual magnitude: +5.87
Combined visual luminosity: 0.39 x Sol
Observed Separation: 1978 A.U.s
As seen from (A-B):
C would appear as magnitude -8.41
As seen from C:
(A-B) would appear as magnitude -8.52
Component A:
Catalog numbers:
Henry Draper (HD) 153557, Bonner Durchmusterung (BD) +47°2415, Giclas (G) 203-37, Hipparcos Input Catalog (HIC) 83020, Smithsonian Astrophysical Observatory (SAO) 46409, Vyssotsky McCormick (McC) 887, Luyten Two-Tenth (LTT) 15019
Apparent visual magnitude: +7.83
Absolute visual magnitude: +6.61
Visual luminosity: 0.20 x Sol
Color indices: B-V= +0.98, U-B= +0.80, R-I= +0.34
Diameter: 1.71 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.44 A.U.s
Angular size of star in sky in CZ: 2.056751 degrees
Component B:
Catalog numbers:
Bonner Durchmusterung (BD) +47°2415, Henry Draper (HD) 153557, Giclas (G) 203-37, Hipparcos Input Catalog (HIC) 83020, Smithsonian Astrophysical Observatory (SAO) 46409, Vyssotsky McCormick (McC) 887, Luyten Two-Tenth (LTT) 15019
Spectral class: M
Luminosity Class: V
Apparent visual magnitude: +11.19
Absolute visual magnitude: +9.97
Visual luminosity: 0.0089 x Sol
Color indices: B-V= +1.47, U-B= +1.04, R-I= +0.81
Comfort Zone (visual): 0.094 A.U.s
Component C:
Catalog numbers:
Henry Draper (HD) 153525, Bonner Durchmusterung (BD) +47°2411, Giclas (G) 203-36, Hipparcos Input Catalog (HIC) 83006, Smithsonian Astrophysical Observatory (SAO) 46403, Vyssotsky McCormick (McC) 886, Luyten Two-Tenth (LTT) 15017
Right Ascension and Declination: 16h57m42.19s, +47°21'44.6" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: -10.4, -37.3, 42.0
Galactic (X,Y,Z) coordinates in ly: 12.9, 42.9, 35.4
Proper motion: 0.303 arcsec/yr (332.5° from north)
Radial Velocity: -7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -24.9, -5.88, 4.93
Spectral class: K8
Luminosity Class: V
Apparent visual magnitude: +7.89
Absolute visual magnitude: +6.68
Visual luminosity: 0.19 x Sol
Color indices: B-V= +1.00, U-B= +0.82, R-I= +0.34
Diameter: 1.62 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.43 A.U.s
Angular size of star in sky in CZ: 2.002809 degrees