The Sixth Fundamental Catalogue (FK6)

Parts I and III of the sixth fundamental catalog, a catalog of high-precision astrometry for bright stars combining centuries of ground-based observations as reflected in FK5 with HIPPARCOS astrometry. The result contains, in particular for the proper motions, statistically significant improvements of the Hipparcos data und represents a system of unprecedented accuracy for these 4150 fundamental stars. The typical mean error in pm is 0.35 mas/year for 878 basic stars, and 0.59 mas/year for the sample of the 3272 additional stars.
FK6 number of the star (it is identical with its FK5 or FK4sup number)
Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object
Search radius in arcminutes
Flag for astrometrically excellent stars, larger numbers are better (3 is best)
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Limit to items.