Cape Photographic Durchmusterung -69°44

light-years

Catalog numbers:
     Gliese (Gl) 55.1, Henry Draper (HD) 7693, Cape Photographic Durchmusterung (CPD) -69°44, Hipparcos Input Catalog (HIC) 5842, Smithsonian Astrophysical Observatory (SAO) 248342
Arity: binary
Right Ascension and Declination: 1h15m0.828s, -68°49'8.13" (epoch 2000.0)
Distance from Sol: 68.9 light-years (21.1 parsecs)
Standard error in distance: 2.5715%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 23.6, 8.00, -64.2
Galactic (X,Y,Z) coordinates in ly: 22.5, -39.8, -51.5
Proper motion: 0.414 arcsec/yr (73.9° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.61
Combined visual luminosity: 0.50 x Sol
Period: 81.29 years
Semimajor Axis: 22.8 A.U.s
Source for orbit data: Gliese
As seen from A:
     B would appear as magnitude -18.21
As seen from B:
     A would appear as magnitude -18.61


Component A:
Spectral class: K2
Luminosity Class: V
Apparent visual magnitude: +7.80
Absolute visual magnitude: +6.18
Visual luminosity: 0.29 x Sol
Comfort Zone (visual): 0.54 A.U.s


Component B:
Proper motion: 0.414 arcsec/yr (73.9° from north)
Radial Velocity: 8.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -35.1, -21.5, -9.67
Spectral class: K
Luminosity Class: V
Apparent visual magnitude: +8.20
Absolute visual magnitude: +6.58
Visual luminosity: 0.20 x Sol
Comfort Zone (visual): 0.45 A.U.s

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