Definitions for "Catalog number"
The number that identifies a satellite, attributed by NASA.
A publisher's catalog number; useful, if you know it, when ordering music. Not to be confused with Opus number, which is more of a scholarly reference (Opus numbers are also useful when ordering, though).
You can either do an Exact or Wildcard Match on this field. If you know it, enter a class's complete catalog number here and select the Exact Match radio button. If you know only part of the number, enter that and select the Wildcard Match radio button.