PNV J19150199+0719471: variable comparison star The comp star 145 (000-BKZ-638) in the AAVSO sequence is variable. The period is about 7.7 hours and amplitude is 0.4 mag. Folded six night light curve: http://murtoinen.jklsirius.fi/ccd/ccd/Arto/145.jpg I will do again my photometry. arto -- Arto Oksanen