SIMBAD query result

Please have a look at the "Dictionary of Nomenclature"

Result of query: info cati BD-21 5275C

.

.

 [Class]      Acronym  (Explanation)   . . . . . . . . . in Simbad, use:
 [Star]       BD (Bonner Durchmusterung) . . . . . . =E= BD +DD NNNNNA
                                                      or BD +DD NNNNNa
=[Association(Magellanic Bridge = Magellanic Bridge)] BD (Battinelli+Demers) 
                                                         ICA NN
 [Star]       SD (Sudliche Bonner Durchmusterung)  . =E= BD -DD NNNNNA
=   in col.1 means that the list is COMPLETELY incorporated in Simbad
=E= indicates catalogues available in electronic form at CDS