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EX Dra is a long-period eclipsing dwarf nova with ∼ 2 – 3 mag amplitude outbursts. This star has been monitored photometrically from November, 2009 to March, 2016 and 29 new mid-eclipse times were obtained. By using new data together with the published data, the best fit to the O − C curve indicate that the orbital period of EX Dra have an upward parabolic change...
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