ST Ursae Majoris: An Interesting Binocular Variable Star

Volume 15 number 2 (1986)

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Christopher P. Stephan
Science Department, Sebring

Abstract

Observations of the semiregular star, ST Ursae Majoris, show an approximate period of 81 days. However, there are occasions when the period is as long as approximately 120 days or as short as approximately 60 days. In 1980 - 81, one cycle lasted approximately 150 days.