Period changes in
eclipsing binary stars observed by amateurs
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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