NGC 525

NGC 525 is a lenticular galaxy in the constellation Pisces, roughly 95.6 million light-years away. It was discovered on 25 September 1862 by Heinrich d'Arrest using an 11-inch refractor telescope in Copenhagen. The galaxy has a faint outer ring, which is characteristic of its lenticular classification. D'Arrest made two observations to pinpoint its position, aided by a magnitude 11–12 star located 2 arcminutes to the northwest, making his coordinates fairly accurate.

Later, John Louis Emil Dreyer included it in the New General Catalogue, describing it as "very faint, very small," with an 11th or 12th magnitude star 5 seconds of time to the west. With an apparent visual magnitude of 13.3, NGC 525 is dim and requires a telescope to observe. It is classified as type S0 on the Hubble Sequence, and its distance of about 95.6 million light-years is estimated from its redshift using Hubble's law. The galaxy is also cataloged as PGC 5232 and UGC 972.