3078 III/78 MK Classification Extension P M Kennedy Mt Stromlo & Siding Spring Observatories, Australia ??? ??? 1983 1983 III/18 : Stellar Spectra classified in the MK system (Jaschek+, 1963) III/42 : Selected MK Spectral Types (Jaschek, 1978) III/189 : General Catalogue of MK types (Buscombe, 1995) Jaschek, C., Conde, H. and de Sierra, A.C. 1964, "Catalogue of Stellar Spectra Classified in the Morgan-Keenan System", Publ. La Plata Obs., Ser Astron. 28, No. 2. (CDS Cat. <III/18>) Morgan, W.W. and Keenan, P.C. 1973, Annual Rev. Astron. Astrophys. 11, 29. MK spectral classification The catalog provides classifications on the Morgan-Keenan (MK) system published in the literature since the appearance of the La Plata catalog (Jaschek et al., 1964). In addition to the MK types, the catalog contains, for REFERENCE PURPOSES ONLY, UBV photometry, some component identifications for multiple systems, and miscellaneous remarks, e.g., cluster membership, although this information is not professed to be complete. A second file of the machine version contains the bibliographical references cited in the data file and indicates classifications done by objective-prism techniques (OP) or from photometric studies (PHOT). Note that extragalactic stars (e.g. in LMC, SMC) are not included.

Name Object identification number=1 Entries are ordered in the catalog with the following priority: HD numbers in ascending numerical order; HDE numbers in ascending numerical order; DM numbers in descending zone and increasing numerical order; Other designations use the following acronyms: BB see Bok & Basinski, Mem. Mt. Stromlo Obs No 16, 1964 BS see Stenholm (1975A&A....39..307S) LF5 see McCuskey and Houk, (1964AJ.....69..412M) LFS see Smith, (1968MNRAS.138..109S) LS I Luminous Stars in the Northern Milky Way I , cat. <III/76> LYNGA see Ark.f.Astr., 3, No.8 MCP McCormick Proper Motion Areas - McCormick Publs 7 and 10 MS see MacConnell & Sanduleak (1970PASP...82...80M) RWT see reference#361 (1979AJ.....84..534C), 1971AJ.....76.1099R and 1974AJ.....79.1406R SW see reference#330 (1977A&AS...27..403S) W see reference#301 (1976A&AS...26...31W) WRA see reference#301 (1976A&AS...26...31W) --- RAh Right Ascension 2000 (hours) number=2 the position may be very rough, or even inexistant. h RAm Right Ascension 2000 (minutes) number=2 the position may be very rough, or even inexistant. min DE- Declination 2000 (sign) number=2 the position may be very rough, or even inexistant. --- DEd Declination 2000 (degrees) number=2 the position may be very rough, or even inexistant. deg DEm Declination 2000 (minutes) number=2 the position may be very rough, or even inexistant. arcmin SpType MK spectral type number=3 The W in Wolf-Rayet types will be found in byte 31, as will a left parenthesis for uncertain types. The temperature class is in byte 32, but other characters are also there, e.g. P (peculiar), the D in Delta DEL types, etc.; the temperature subclass is in bytes 34-36, but other characters can be there too. Bytes 37-43 contain luminosities, peculiarities, etc. --- r_SpType Reference number for the MK type number=4 Three stars have no reference for the spectral type: HD 62318 (record#8104), HD 175253 (record#19457) and HD 222872B (record#23441) --- Vmag V magnitude as taken from the literature. mag n_Vmag V if V variable, : for uncertain --- B-V B-V color. Plus signs are omitted. mag U-B U-B color. Plus signs are omitted. mag r_Vmag Reference number for photometry. --- Rem Remarks. number=5 Remarks can be component identification, variable-star names, cluster membership, HDE numbers (6 digits), miscellaneous identifications. Byte 80 contains an asterisk for stars classified by Morgan and Keenan (1973) for the revised MK system. --- Ref Reference number, as written in columns r_SpType and r_Vmag of the catalog --- BibRef Bibliographic Reference --- Auth Authors --- Note List, or type of classification like OP for objective-prism classification, PHOT for photometric classification --- Francois Ochsenbein CDS 1996Dec23 UNKNOWN UNKNOWN The machine-readable MK Classification Extension Catalogue, version 1983 was received at CDS in 1983; a first documentation was prepared at NASA/ADC by Wayne H. Warren. The catalogue was checked against catalogue standards at CDS in December 1996: several misalignments, missing decimal points, etc were corrected. III_78.xml