Kuiper 99

Catalog numbers:
Gliese (Gl) 795, Henry Draper (HD) 196795, Bonner Durchmusterung (BD) +4°4510, Giclas (G) 24-23, Luyten Half-Second (LHS) 3568, Hipparcos Input Catalog (HIC) 101955, Smithsonian Astrophysical Observatory (SAO) 126068, Vyssotsky McCormick (McC) 821, AGK3 Reference (AGK3R) 18470, Kuiper (KUI) 99
Arity: binary
Points of interest:
There seems to be a short-period variation in the A star's radial velocity. Hence, it's probably a close-orbiting binary pair as shown. The "diameter" figure listed would thus be the computed diameter of a single star as bright as both components of this close-orbiting binary combined.

Right Ascension and Declination: 20h39m37.751s, +4°58'19.35" (epoch 2000.0)
Distance from Sol: 60.6 light-years (18.6 parsecs)
Standard error in distance: 3.9443%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 38.7, -46.3, 5.25
Galactic (X,Y,Z) coordinates in ly: 35.3, 43.9, -22.5
Proper motion: 0.882 arcsec/yr (84.1° from north)
Radial Velocity: -39.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -74.3, -16.0, -42.3

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +6.53
Combined visual luminosity: 0.21 x Sol
Period: 39.4 years
Semimajor Axis: 14.9 A.U.s
Eccentricity: 0.12
Periastron distance: 13.1 A.U.s
Apastron distance: 16.6 A.U.s
Year in which periastron occurs: 1963.35
Source for orbit data: P. Baize
As seen from A:
     At periastron, B would appear as magnitude -17.93
     At apastron, B would appear as magnitude -17.41
As seen from B:
     At periastron, A would appear as magnitude -19.15
     At apastron, A would appear as magnitude -18.63

Component A:
NOTE: This star is actually a close-orbiting binary pair. The data below are for both sub-components of the pair combined.
Spectral class: K4
Luminosity Class: V
Apparent visual magnitude: +8.18
Absolute visual magnitude: +6.83
Visual luminosity: 0.16 x Sol
Diameter: 0.75 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.40 A.U.s
Angular size of star in sky in CZ: 0.997337 degrees

Component B:
Spectral class: K8
Luminosity Class: V
Apparent visual magnitude: +9.40
Absolute visual magnitude: +8.05
Visual luminosity: 0.052 x Sol
Diameter: 0.67 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.23 A.U.s
Angular size of star in sky in CZ: 1.562671 degrees

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