Bonner Durchmusterung -4°5804

light-years

Catalog numbers:
     Gliese (Gl) 886, Henry Draper (HD) 217580, Bonner Durchmusterung (BD) -4°5804, Giclas (G) 156-75, Luyten Half-Second (LHS) 6, Hipparcos Input Catalog (HIC) 113718, Smithsonian Astrophysical Observatory (SAO) 146456, AGK3 Reference (AGK3R) 20606
Arity: binary
Points of interest:
     Tokovinin et al. have studied this spectroscopic-binary system using the same techniques currently used to search for extrasolar planets. They measure a minimum mass of 60 x Jupiter (about 0.06 x Sol) for the B component.

Right Ascension and Declination: 23h1m51.562s, -3°50'55.32" (epoch 2000.0)
Distance from Sol: 55.2 light-years (16.9 parsecs)
Standard error in distance: 5.4452%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 53.4, -13.8, -3.71
Galactic (X,Y,Z) coordinates in ly: 10.3, 29.8, -45.4
Proper motion: 0.446 arcsec/yr (117.2° from north)
Radial Velocity: -43.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -27.7, -46.0, 16.0

What do all these fields mean?

Data for A and B's orbit around one other:
Combined spectrum: K4 V
Combined apparent visual magnitude: +7.48
Combined absolute visual magnitude: +6.33
Combined visual luminosity: 0.25 x Sol
Period: 1.24479 years
Semimajor Axis: 1 A.U.s
Eccentricity: 0.52
Periastron distance: 0.48 A.U.s
Apastron distance: 1.52 A.U.s
Source for orbit data: Tokovinin et al. (1994)


Component A:
Diameter: 0.83 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)


Component B:

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.