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Period changes in eclipsing binary stars observed by amateurs

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Anthony Mallama

14012 Lancaster Lane, Bowie, MD 20715


Received 28 April 1987




Recent period changes in UU And, SW Cyg, TY Del, TW Dra, TU Her, Z Per, and Y Psc have been revealed by visual times of minima obtained over the past two decades. New ephemerides are reported for these stars.


Link to ADS abstract, article and citation information

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