Kuiper 41

light-years

Catalog numbers:
     Gliese (Gl) 352, Bonner Durchmusterung (BD) -12°2918, Luyten Half-Second (LHS) 2151, Hipparcos Input Catalog (HIC) 46706, Vyssotsky McCormick (McC) 26, Kuiper (KUI) 41
Arity: binary
Right Ascension and Declination: 9h31m19.38s, -13°29'16.9" (epoch 2000.0)
Distance from Sol: 34.4 light-years (10.5 parsecs)
Standard error in distance: 4.3421%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -26.6, 20.2, -8.01
Galactic (X,Y,Z) coordinates in ly: -11.9, -28.2, 15.6
Proper motion: 0.731 arcsec/yr (85.4° from north)
Radial Velocity: 7.3 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 22.5, -2.09, 29.6

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +9.94
Combined visual luminosity: 0.0092 x Sol
Period: 18.3 years
Semimajor Axis: 5.80 A.U.s
Eccentricity: 0.28
Periastron distance: 4.18 A.U.s
Apastron distance: 7.43 A.U.s
Year in which periastron occurs: 1983.8
Source for orbit data: W.D. Heintz
As seen from A:
     At periastron, B would appear as magnitude -17.78
     At apastron, B would appear as magnitude -16.53
As seen from B:
     At periastron, A would appear as magnitude -17.77
     At apastron, A would appear as magnitude -16.52


Component A:
Spectral class: M4
Luminosity Class: V
Apparent visual magnitude: +10.81
Absolute visual magnitude: +10.70
Visual luminosity: 0.0046 x Sol
Mass: 0.2 x Sol
Diameter: 0.42 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.068 A.U.s
Orbital period in CZ: 14.3796 days
Tidal index in CZ: 645.189
Angular size of star in sky in CZ: 3.308409 degrees


Component B:
Spectral class: M4
Luminosity Class: V
Apparent visual magnitude: +10.80
Absolute visual magnitude: +10.69
Visual luminosity: 0.0046 x Sol
Mass: 0.2 x Sol
Diameter: 0.42 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.068 A.U.s
Orbital period in CZ: 14.4793 days
Tidal index in CZ: 636.336
Angular size of star in sky in CZ: 3.293207 degrees

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