thumb|right|upright=1.4|Light curve of eclipsing dwarf nova HT Cassiopeiae during outburst, showing [[eclipses and SU Ursae Majoris-type superhumps]] In astronomy, a superhump is a periodic brightness variation in a cataclysmic variable star system, with a period within a few percent of the orbital period of the system.
thumb|right|upright=1.4|Light curve of eclipsing dwarf nova HT Cassiopeiae during outburst, showing [[eclipses and SU Ursae Majoris-type superhumps]] In astronomy, a superhump is a periodic brightness variation in a cataclysmic variable star system, with a period within a few percent of the orbital period of the system.
==History== Superhumps were first seen in SU Ursae Majoris (SU UMa) stars, a subclass of dwarf novae, at times when the binary system underwent a superoutburst, which is an unusually strong outburst (increase in brightness) caused by an increased accretion rate.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).