OK, one more night and I've finally starting to converge on Patrick's period. Plot http://www.lolife.com/astronomy/gsc717-1091/gsc717-1091_phase.jpg Data http://www.lolife.com/astronomy/gsc717-1091/vdata_hjd.txt It still does not phase with TASS, though, so I believe we are seeing a change of period over that baseline. Cheers, Michael Koppelman http://www.lolife.com/astronomy/