Physics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990javso..19...60s&link_type=abstract
The Journal of the American Association of Variable Star Observers. vol. 19, no. 1, p. 60-64
Physics
Xy Lyrae, Ch Cygni, Xy Lyrae, Ch Cygni
Scientific paper
Presented are the results of visual observations of the irregular
variable XY Lyrae during the last 15 years, and of the symbiotic star CH
Cygni during the past six years. The observations of CH Cygni show deep
minima in 1988 and 1990.
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