SIMBAD query result

Please have a look at the "Dictionary of Nomenclature"

Result of query: info cati ADS 3321 E

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 [Class]      Acronym  (Explanation)   . . . . . . . . . in Simbad, use:
 [**]         A (Aitken) . . . . . . . . . . . . . . . . ADS NNNNNAA
 [**]         ADS (Aitken Double *)  . . . . . . . . . . ADS NNNNN AAA
                                                      or ADS NNNNNa AAA
 [**]         Aitken (Aitken)  . . . . . . . . . . . . . ADS NNNNNAA