EX Hydrae

EX Hydrae is an eclipsing intermediate polar -type cataclysmic variable star that also undergoes eclipses. The system varies in apparent magnitude from 9.6 to 14.0. The system consists of a white dwarf primary and an M-type secondary, of masses of and respectively. The orbital period is 98.25696 minutes. The system is distant, making EX Hya one of the closest cataclysmic variable stars. The cataclysmic outbursts appear to be caused by accretion of material from the M-star to the white dwarf.
EX Hydrae also possess a 67-minute oscillation, believed to be caused by the spin period of the white dwarf component. EX Hydrae's outbursts are unpredictable.