We have obtained spectral types for 351,863 stars in the Tycho-2 catalog by cross-referencing the Tycho-2 catalog against the Michigan Catalogs , , , , and ; the Catalog of...
The Hipparcos and Tycho catalogs are the primary products of the European Space Agency's astrometric mission, Hipparcos. The satellite, which operated for four years,...
The Tycho-2 proper motions and Tycho-2 and 2MASS photometry are used to select 97348 red giant clump (RGC) stars. The interstellar extinction and photometric distance are...
