Bonner Durchmusterung +3°339

Catalog numbers:
Gliese (Gl) 98, Henry Draper (HD) 15285, Bonner Durchmusterung (BD) +3°339, Giclas (G) 73-60, Hipparcos Input Catalog (HIC) 11452, Smithsonian Astrophysical Observatory (SAO) 110540, Aitken Double Star (ADS) 1865, Vyssotsky McCormick (McC) 224, Aitken (A) 2329
Arity: binary
Right Ascension and Declination: 2h27m45.927s, +4°25'55.26" (epoch 2000.0)
Distance from Sol: 54.2 light-years (16.6 parsecs)
Standard error in distance: 2.8239%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 43.2, 32.5, 4.19
Galactic (X,Y,Z) coordinates in ly: -33.2, 9.76, -41.6
Proper motion: 0.255 arcsec/yr (34.2° from north)
Radial Velocity: 10.4 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -21.1, 6.64, 4.84

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +7.57
Combined visual luminosity: 0.081 x Sol
Period: 25.32 years
Semimajor Axis: 9.05 A.U.s
Eccentricity: 0.21
Periastron distance: 7.15 A.U.s
Apastron distance: 11.0 A.U.s
Year in which periastron occurs: 1937.63
Source for orbit data: O.J. Eggen
As seen from A:
     At periastron, B would appear as magnitude -18.90
     At apastron, B would appear as magnitude -17.98
As seen from B:
     At periastron, A would appear as magnitude -19.04
     At apastron, A would appear as magnitude -18.12

Component A:
Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +9.36
Absolute visual magnitude: +8.26
Visual luminosity: 0.043 x Sol
Diameter: 0.67 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.21 A.U.s
Angular size of star in sky in CZ: 1.716589 degrees

Component B:
Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +9.50
Absolute visual magnitude: +8.40
Visual luminosity: 0.038 x Sol
Comfort Zone (visual): 0.20 A.U.s

Data for this star system were most recently updated on 4-April-2001.