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A new reduction of Hipparcos satellite data claims accuracies up to four times better for stars brighter than magnitude 8.0 compared to the original 1997 catalog. The catalog provides improved astrometric data, including parallaxes and proper motions, for studies of stellar luminosities and local galactic kinematics. This version was created by NASA HEASARC in August 2009 based on corrected data from the CDS Catalog I/311.
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