Abstract:
Pleione is a well known shell star in the Pleiades cluster (HD 23862,
m_v = 5.20, Sp.Type B8Vn + shell according to Abt and Levato (1978)). Its
photometric variability was investigated by Sharov and Lyuty (1976) who
collected all available photometric observations on the star. They observed a
minimum in 1973 connected with a new shell outburst. In 1974 and 1975 Sharov
and Lyuty observed the beginning of a slow increase in B and V. Hopp and
Witzigmann (1980) observed BU Tau in B and V during 1977- 1980. Their
observations showed that the shell outburst still goes on as the star has not
returned to its normal maximum light.
