seb on 16-Feb-2022 10:52:02 GMT about NGC 4990
Correct. The error comes from
this article
where on page 73 (https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1995MNSSA..54...72S&db_key=AST&page_ind=1&data_type=GIF&type=SCREEN_VIEW&classic=YES) they write Cocoon Galaxy = NGC 4990.
The NAME Cocoon Galaxy will be removed from NGC 4990 and added to
NGC 4490
.
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View annotation on NGC 4990 object