U Delphini: The Last 100 Years

Volume 26 number 2 (1998)

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Raymond R. Thompson

Abstract

Using archival visual data from the AAVSO, photographic data from the Harvard College Observatory plate collection, and the author's photoelectric (V) data, an attempt was made to see how far back the 1100-day period of the semiregular variable U Delphini could be tracked.