Finsen 283

light-years

Catalog numbers:
     Gliese (Gl) 836.9, Henry Draper (HD) 206804, Cape Photographic Durchmusterung (CPD) -58°7893, Luyten Half-Second (LHS) 3707, Hipparcos Input Catalog (HIC) 107522, Smithsonian Astrophysical Observatory (SAO) 247172, UGPMF 536, Finsen (FIN) 283, Woolley (Wo) 9753, Smethells (Sm) 88, Cordoba Durchmusterung (CD) -58°8156
Arity: binary
Right Ascension and Declination: 21h46m35.807s, -57°42'12.15" (epoch 2000.0)
Distance from Sol: 62.1 light-years (19.0 parsecs)
Standard error in distance: 3.4533%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 27.7, -18.2, -52.5
Galactic (X,Y,Z) coordinates in ly: 39.4, -17.2, -44.7
Proper motion: 0.906 arcsec/yr (174.6° from north)
Radial Velocity: -7 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -18.5, -76.6, 22.9

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +7.38
Combined visual luminosity: 0.097 x Sol
Period: 6.25 years
Semimajor Axis: 3.90 A.U.s
Eccentricity: 0.551
Periastron distance: 1.75 A.U.s
Apastron distance: 6.05 A.U.s
Year in which periastron occurs: 1945.5
Source for orbit data: W.S. Finsen
As seen from A:
     At periastron, B would appear as magnitude -22.15
     At apastron, B would appear as magnitude -19.46
As seen from B:
     At periastron, A would appear as magnitude -22.28
     At apastron, A would appear as magnitude -19.59

Data for A and B's orbit, take 2:
Period: 12.48 years
Semimajor Axis: 5.99 A.U.s
Eccentricity: 0.024
Periastron distance: 5.85 A.U.s
Apastron distance: 6.14 A.U.s
Year in which periastron occurs: 1945.84
Source for orbit data: W.S. Finsen
As seen from A:
     At periastron, B would appear as magnitude -19.53
     At apastron, B would appear as magnitude -19.43
As seen from B:
     At periastron, A would appear as magnitude -19.66
     At apastron, A would appear as magnitude -19.56


Component A:
Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +9.47
Absolute visual magnitude: +8.07
Visual luminosity: 0.051 x Sol
Diameter: 0.7 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: 1.646654 degrees


Component B:
Spectral class: K7
Luminosity Class: V
Apparent visual magnitude: +9.60
Absolute visual magnitude: +8.20
Visual luminosity: 0.046 x Sol
Diameter: 0.68 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: 1.698300 degrees

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