The Henry Draper Catalog with Gaia IDs

This is the Henry Draper catalog (HD, Cannon & Pickering 1918-1924) as distributed by the Astronomical Data Center in 1989 (Vizier III/135A), with Gaia DR2 source_ids and positions added. The link to modern Gaia DR2 was done through Fabricius et al's match between HD and Tycho 2 (Vizier IV/25), TGAS to match Tycho 2 and Gaia DR1, and Gaia DR2 to match against Gaia DR1.
Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object
Search radius in arcminutes
No selection matches all, multiple values legal.
Spectral type, given in upper and lower case as in the published catalog.
HD number for this object
Photovisual magnitude or the star, except for magnitudes >= 20, which are object type flags (see note).
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