NGC 755 is an emission line spiral galaxy in the constellation of Cetus. The galaxy's velocity of 1641.2 km/s was used to calculate its distance using the Tully–Fisher relation. Its dark matter halo was found to be core-dominated, in agreement with predictions from the lambda-CDM model of cosmology.

400/500mm - 17.5" (12/23/92): moderately bright, fairly large, very elongated 3:1 SW-NE, 2.5'x0.8', brighter along major axis, brighter core but no well-defined nucleus, appears mottled.