NGC 660 is a peculiar and unique polar-ring galaxy located approximately 45 million light years from Earth in the Pisces constellation. It is the only such galaxy having, as its host, a "late-type lenticular galaxy". It was probably formed when two galaxies collided a billion years ago.

Magnitude: 12

Constellation: Pisces

Apparent magnitude (V): 12

Apparent size (V): 2.710 × 0.840 arcmin

Redshift: 0.002842