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There was an article in AS&T (last year I think) about this exact subject.
How objects have too many names. Some have 4 or 5 classifications!!!!
An 'M' number, an 'NGC', an 'IC', an 'MCG' and a common name. Some other objects use differing catalogue numbers and leave out the more common ones ('M', NGC' etc). Then there are PGC's, SAC's, etc.
Then we get to Star catalogues: SAO, TYC2, GCVS, WDS, BossGC, GSC, HD, BD, CD, CPD, HR, Flamsteed, Bayer, and common names!!!!
How is anyone expected to know what is what up there with so many classifications for each object!!!!!
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