AM Herculis [SEP] constellation
AM Herculis
AM Herculis is a binary variable star located in the constellation Hercules. This star, along with the star "AN Ursae Majoris", is the prototype for a category of cataclysmic variable stars called "polars", or "AM Her" type stars.
History.
AM Herculis and was first cataloged in 1923 by Max Wolf and was listed at the time as "Veränderlicher 28.1923", which is now "AN 28.1923" in the "General Catalogue of Variable Stars". It was observed to
V1500 Cygni
V1500 Cygni or Nova Cygni 1975 was a bright nova occurring in 1975 in the constellation Cygnus. It had the second highest intrinsic brightness of any nova of the 20th century, exceeded only by CP Puppis in 1942.
V1500 Cygni was discovered on August 29 1975, and reached magnitude 1.7 on the next day. It remained visible to the naked eye for about a week, and 680 days after maximum the star had dimmed by 12.5 magnitudes.
It is an AM Herculis type star, consisting of a