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NGC 390 is a star located in the constellation Pisces .. NGC. New General Catalogue. Pisces. Pisces ( constellation ). star. star. It was discovered on November 19 , 1884 by Guillaume Bigourdan .. Guillaume Bigourdan. Guillaume Bigourdan. It was described by Dreyer as very faint , very small , stellar . ''. Dreyer. John Louis Emil Dreyer. However , this position precesses to a position where there is nothing apart from a few scattered stars .. However , Bigourdan 's original measurements point exactly to a star , which is the most likely candidate for NGC 390 ; however , as a result of this confusion , a galaxy nearby -LRB- PGC 4021 -RRB- has sometimes been mistaken as NGC 390 .. NGC. New General Catalogue. PGC. Principal Galaxies Catalogue. star. star. PGC 4021. PGC 4021