The purpose of this catalog is to provide bibliographic references to spectral classifications of stars in the Morgan-Keenan system published in the literature prior to January 1963. The catalog includes, with few exceptions, only objects contained in the Durchmusterungen: BD, SD, CD, and CPD. Objects belonging to stellar clusters and extragalactic nebulae were excluded from the catalog if they are not listed in the Durchmusterungen. The catalog includes sequential numbers, HD and DM numbers, right ascension and declination (B1900.0), magnitudes, spectral classifications, and bibliographic references. This machine-readable version was modified and corrected with errata at the Astronomical Data Center/Goddard Space Flight Center, NASA/Goddard Space Flight Center.

Cone search capability for table III/18B/mkclass (Catalog Data)