I posted last Saturday night's run on my web site (Figure 10) which also shows the variation. A PDM analysis of all my data (6 nights)still shows a period of 0.1708 day. http://vsnet.lewcook.com/xte1118.htm ===== Regards, Lew === IMPROVED! Lew's instant automatic observation plotter now reports maximum and minimum values, averages and standard deviations. Copy a list of observations into Autoplot.xls and they are automatically plotted. Autoplot.xls (an Excel spreadsheet) is freeware. http://vsnet.lewcook.com/autoplot.htm __________________________________________________ Do You Yahoo!? Talk to your friends online and get email alerts with Yahoo! Messenger. http://im.yahoo.com/