Plot the data obtained and determine the period if possible. Of course, novae and supernovae are the most dramatic examples of eruptive variables but these cannot be predicted. If the student is so fortunate to discover a new one, he or she will achieve immediate fame. Finally, students can select various eclipsing binaries and cataclysmic variables. As above, determine the light curve for each and report any anomalous behavior.
Accurate time is essential for good astronomy.
Try to get this point to within one or two seconds accuracy. Another method of obtaining accurate time is to set the computer clock at the beginning of each session by dialing the NIST number in TheSky under Tools, Date and Time, Time Service. The program will automatically dial the number and reset the clock. This may not be available in all locations. In any event, try not to rely on the local telephone time service which in some areas can be several seconds off.