V491 Persei
Proper names: V491 Persei
Catalog numbers:
Gliese (Gl) 160.1, Henry Draper (HD) 25893, Hipparcos Input Catalog (HIC) 19255, Aitken Double Star (ADS) 2995, Smithsonian Astrophysical Observatory (SAO) 56982, Giclas (G) 81-4, Giclas (G) 39-1, Bonner Durchmusterung (BD) +37°878, New Suspected Variable (NSV) 1463, AGK3 Reference (AGK3R) +37°473
Arity: binary
Right Ascension and Declination: 4h7m34.374s, +38°4'28.63" (epoch 2000.0)
Distance from Sol: 67.2 light-years (20.6 parsecs)
Standard error in distance: 2.3513%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 24.9, 46.6, 41.4
Galactic (X,Y,Z) coordinates in ly: -62.4, 22.1, -11.3
Proper motion: 0.283 arcsec/yr (140.5° from north)
Radial Velocity: 26.5 km/sec
Source for proper motion: ARI Data Base for Nearby Stars
Source for radial velocity: Hipparcos Input Catalog
Galactic (U,V,W) velocity components in km/s: -33.2, -17.3, -7.87
What do all these fields mean?
Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.53
Combined visual luminosity: 0.54 x Sol
Observed Separation: 35.0 A.U.s
Source for orbit data: Heintz
As seen from A:
B would appear as magnitude -16.42
As seen from B:
A would appear as magnitude -18.12
Component A:
Spectral class: G5
Luminosity Class: V
Apparent visual magnitude: +7.30
Absolute visual magnitude: +5.73
Visual luminosity: 0.44 x Sol
Variable type: BY Draconis (rotating variable)
Color indices: B-V= +0.86, U-B= +0.49
Comfort Zone (visual): 0.67 A.U.s
Component B:
Spectral class: K2
Luminosity Class: V
Apparent visual magnitude: +9.00
Absolute visual magnitude: +7.43
Visual luminosity: 0.093 x Sol
Comfort Zone (visual): 0.30 A.U.s
Data for this star system were most recently updated on 16-March-2005.