NGC 511, also occasionally referred to as PGC 5103 or UGC 936, is an elliptical galaxy in the constellation Pisces.

[2] It is located approximately 499 million light-years from the Solar System[4] and was discovered on 26 October 1876 by French astronomer Édouard Stephan.

The description and position given in his notes matches UGC 936 and PGC 5103, thus the objects are widely recognized as the same.

[5] The galaxy has an apparent size of 1.1 × 1.1 arcmins and a recessional velocity of approximately 10954 kilometers per second.

The distance of NGC 511 from the Solar System can be estimated using Hubble's law, which puts the object at nearly 500 million light-years from the Sun.