NGC 804 is a lenticular galaxy located in the Triangulum constellation about 231 million light-years from the Milky Way. It was discovered by the American astronomer Lewis Swift in 1885. This galaxy was also observed by the French astronomer Guillaume Bigourdan on December 24, 1897, and it has been added to the Index Catalogue under the symbol IC 1773.

400/500mm - 17.5" (11/26/94): faint, small, very elongated 3:1 N-S, very small brighter core with thin faint extensions. Two mag 11.5 stars are 1.9' WSW and 3.5' SW of center. UGC 1577 lies 27' NE.