A catalog may be searched by title. It is often difficult to guess the exact form in which words will appear in a document. Using one or more of these will normally make the search more efficient. There is also an author index . Clicking on one or more of these will provide a list of the appropriate catalogs and will often make the search more efficient.
Most catalogs contain many objects.
These are not normally listed in the document and hence will not be found by a search. A few, mainly in journal files, that refer to only one or several objects may be found. Thus, a search for P Cyg or P Cygni is more likely to return a list of catalogs of objects with P Cygni lines than those that contain the star itself. 78K, K is the first letter of the last name of the first author. To help users easily refine their search terms, the search results page includes the search form with the terms as entered.