BL Herculis is a type of variable star that belongs to the class of "cataclysmic variables," specifically categorized as an "artificial system" consisting of a binary star system. In these systems, one star is a white dwarf, and the other is typically a red dwarf or main-sequence star. BL Herculis is notable for its periodic outbursts, which occur as a result of mass transfer from the companion star to the white dwarf.
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