Xi Pegasi

Proper names: Xi Pegasi, 46 Pegasi
Catalog numbers:
Gliese (Gl) 872, Henry Draper (HD) 215648, Bonner Durchmusterung (BD) +11°4875, Luyten Half-Second (LHS) 3851, Hipparcos Input Catalog (HIC) 112447, Smithsonian Astrophysical Observatory (SAO) 108165, Aitken Double Star (ADS) 16261, Hoffleit Bright Star (HR) 8665, J. Herschel (HJ) 301
Age: 5200 million years
Source for age: B. Edvardsson et al., "Chemical Evolution of the Galactic Disc", A&AP 275
Heavy element abundance: 71% of Sol
Standard error in heavy element abundance: 25%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: binary
Right Ascension and Declination: 22h46m41.6s, +12°10'22" (epoch 2000.0)
Distance from Sol: 53.0 light-years (16.2 parsecs)
Standard error in distance: 1.2358%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 49.2, -16.3, 11.2
Galactic (X,Y,Z) coordinates in ly: 5.51, 39.9, -34.5
Proper motion: 0.538 arcsec/yr (155.0° from north)
Radial Velocity: -6 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 3.92, -31.8, -27.0

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +3.14
Combined visual luminosity: 4.82 x Sol
Observed Separation: 192 A.U.s
Year of separation observation: 1954
As seen from A:
B would appear as magnitude -9.51
As seen from B:
A would appear as magnitude -17.02

Component A:
Spectral class: F6
Luminosity Class: IV-V
Apparent visual magnitude: +4.20
Absolute visual magnitude: +3.14
Visual luminosity: 4.82 x Sol
Color indices: B-V= +0.50, U-B= -0.03, R-I= +0.19
Diameter: 1.82 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 2.20 A.U.s
Angular size of star in sky in CZ: 0.441103 degrees

Component B:
Catalog numbers:
Luyten Half-Second (LHS) 3852
Proper motion: 0.538 arcsec/yr (155.0° from north)
Radial Velocity: -7.2 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 3.79, -32.7, -26.2
Spectral class: M1
Luminosity Class: V
Apparent visual magnitude: +11.70
Absolute visual magnitude: +10.65
Visual luminosity: 0.0048 x Sol
Diameter: 0.51 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.069 A.U.s
Angular size of star in sky in CZ: 3.922853 degrees

Data for this star system were most recently updated on 12-May-2001.