3018B III/18B Stellar Spectra Classified in Morgan-Keenan System C Jaschek H Conde A C de Sierra Publ. La Plata Obs., Ser. Astron. 28, No. 2 ??? ??? 1964 1964PLPla..28....1J MK spectral classification Spectral types 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.

count Counter within a group of records For any given star there may be as many as 11 records. The first record of such a group gives a spectral classification and references, while subsequent records may be used merely to continue the list of references which gave that classification, or subsequent records are used to give different classifications (and associated references) for the given star. --- HD HD number --- n_HD Additional designation or alternate number --- DM_cat DM catalog designation --- DM_sign Sign of DM zone --- DM_zone Declination zone deg DM_num Number within zone --- n_DM Additional designation --- name Alternative name --- RAh Right ascension hours (1900.0) h RAm Right ascension minutes (1900.0) min DE- Sign of declination --- DEd Declination degrees (1900.0) deg DEm Declination minutes (1900.0) arcmin mag Magnitude (accuracy is uncertain) For identification purposes only Two stars have non-digits in the magnitude field. GM Per (line 3704) has the magnitude 9.0) HD 38268 (line 5015) has NEB in the magnitude column mag Sp Spectral type Peculiar objects are generally included; subdwarfs listed occasionally; N, R, and S stars usually mentioned; white dwarfs omitted. --- note References and notes Each reference is given as a three digit integer followed by a blank. The notes are coded as follows: V variable SB spectroscopic binary VB visual binary TS triple system --- com Asterisk indicates corrected value --- RAr Right ascension in radians rad DEr Declination in radians rad cnt Counter from hard copy catalog A counter which sequentially numbers the entries in the hardcopy. The records in the machine readable version have been reordered by right ascension (1900). --- mkclass.txt*The original ADC document The file summary, format description, and changes have been removed as they are included in either the ReadMe or changes.txt changes.txtChanges made by ADC N.G. Roman ADC/SSDOO 1997Aug07 III_18B.xml