USNO Bright Star Catalog, version 1
Norbert Zacharias, Valeri V. Makarov, Charles T. Finch, Hugh C., Harris, Jeffrey A. Munn, John P. Subasavage
TL;DR
The USNO Bright Star Catalog provides a comprehensive, high-precision astrometric dataset of the brightest stars, combining Hipparcos data with ground-based observations, covering nearly all stars brighter than magnitude 3.
Contribution
This catalog is the first to combine Hipparcos and ground-based data to produce a nearly complete, high-precision astrometric catalog of the brightest stars covering the entire sky.
Findings
Catalog includes 1423 stars with detailed astrometric parameters.
Achieves proper motion precision comparable to Gaia.
Lists stars missing in Gaia EDR3 and without Gaia parallaxes.
Abstract
USNO Bright Star Catalog (UBSC) is a new astrometric catalog of 1423 brightest stars covering the entire sky, which is published online. It is nearly complete to mag except for three stellar systems. A combined astrometric solution of the Hipparcos Intermediate Astrometry Data and two dedicated ground-based campaigns in 2013 -- 2020 is the basis for this catalog. The astrometric parameters for each star include position coordinates, parallax, proper motion components, and their covariances on the Hipparcos mean epoch 1991.25. 64 percent of the catalog are flagged as known or suspected double or binary stars. UBSC lists 68 stars missing in Gaia EDR3 and another 114 stars without Gaia parallaxes or proper motions. The formal precision achieved for proper motions is comparable to that of Gaia.
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