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NGC 5446 is probably identical to NGC 5438. This is another of WH's earlier discoveries (19 March 1784). Many of the nebulae found in the spring of 1784 have larger position errors than later observations. In this case, the difference in RA is 30 seconds, and the Dec's are close. The descriptions are similar enough to make the identity almost certain.
Synonyms: H III-057
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "eF, S, verified with 240 power." Dreyer notes that it was not seen by Bigourdan/
The RNGC (Sulentic and Tifft 1973) notes that this is a galaxy. Their coded description reads R,DIF,STELNUC.
The Messier objects
The Bennett objects
The Caldwell list
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