What do all these fields mean?
Data for A and B's orbit around one other:
Combined absolute visual magnitude: +9.87
Combined visual luminosity: 0.0099 x Sol
Observed Separation: 458 A.U.s
As seen from A:
B would appear as magnitude -6.89
As seen from B:
A would appear as magnitude -8.09
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:
Giclas (G) 87-44
Spectral class: M3.5e
Luminosity Class: V
Apparent visual magnitude: +10.58
Absolute visual magnitude: +10.18
Visual luminosity: 0.0074 x Sol
Variable type: UV Ceti flare star (eruptive variable)
Color indices: B-V= +1.47, U-B= +1.15, R-I= +1.07
Diameter: 0.48 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.086 A.U.s
Angular size of star in sky in CZ: 2.972961 degrees
Component B:
Catalog numbers:
Giclas (G) 87-43, Ross 989
Right Ascension and Declination: 7h28m39s, +36°20'23" (epoch 1950.0)
Celestial (X,Y,Z) coordinates in ly: -11.9, 29.3, 23.3
Galactic (X,Y,Z) coordinates in ly: -36.0, -1.75, 15.6
Proper motion: 0.441 arcsec/yr (231.0° from north)
Radial Velocity: 0.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -8.93, -9.57, -21.5
Spectral class: M4.5e
Luminosity Class: V
Apparent visual magnitude: +11.78
Absolute visual magnitude: +11.38
Visual luminosity: 0.0025 x Sol
Color indices: B-V= +1.52, U-B= +1.18, R-I= +1.22
Mass: 0.18 x Sol
Diameter: 0.38 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.050 A.U.s
Orbital period in CZ: 9.48944 days
Tidal index in CZ: 1481.49
Angular size of star in sky in CZ: 4.090189 degrees