2124A II/124A UBV and MK types in Open Clusters, 3rd ed. J -C Mermilliod Astron. Astrophys. Suppl. Ser. 24 159 1986 1976A&AS...24..159M Clusters, open MK spectral classification Photometry, UBV The catalog is a compilation of UBV photoelectric photometry and MK spectral types published up to 1986 for 16433 stars in 295 open clusters. It updates the 1976 edition and contains nearly twice as many data as the earlier version. The catalog lists identifications, cross-identifications, V, B-V, U-B, spectral types, remarks on various peculiarities, and references.

LID Identification in Geneva/Lausanne system number=1 see Mermilliod, Bull. Inf. CDS 14, 32 (1978) for a description of the numbering system; detailed references are in file "lid.txt". --- n_LID Remark about star number=2 this peculiarity is a single-character code as follows: B = Spectroscopic Binary P = Peculiar star D = Visual binary V = Variable star E = Emission-line star --- OrigID Original identification as listed in reference for the data --- pmID Identification as listed in proper motion study --- HD Henry Draper Catalog (HD) number --- DM Durchmusterung catalog ID number=3 The Durchmusterung number has the form 'nn+ZZNNNNN' where nn = 'BD', 'CD', 'CP' +ZZ = zone in degrees NNNNN = number in the zone --- Vmag V magnitude in the UBV system mag B-V B-V color in the UBV system mag U-B U-B color in the UBV system mag r_UBV Photometry reference number --- MKtype Spectral type --- r_MKtype Spectral type reference number --- Remarks Remarks and further cross-identifications (details in "adc.doc" or "adc.tex") --- RefNum Reference number --- n_RefNum 'P' for Photometry ref. ("r_UBV" in catalog.dat),'S' for Spectrosc. ref. ("r_MKtype in catalog.dat) --- Ref Text of bibliographic reference --- adc.docADC Documentation (ASCII) adc.texADC Documentation (LaTex) lid.txtDescription of LID numbers (Lausanne/Geneve) refmk.txtReferences for Spectral Classification refubv.txtReferences for Photometry Francois Ochsenbein CDS 1995Apr11 UNKNOWN UNKNOWN See in "adc.doc" or "adc.tex", section 3 (History), from the "Selected Astronomical Catalogs" Vol. 1 CD-ROM (1992), directory /photom/ubvopen II_124A.xml