Variable star DO Cas

[Dave Smith]

Finally did some astro last night. This is the primary minimum of the eclipsing binary star DO Cas. I did spend the whole of the previous night getting data on a different star only to have to delete the lot as the important stars were saturated and so could not be analysed.
Taken with my Megrez 90 + 0.8x FR and Atik 460EX CCD camera
Each dot represents a 10 sec exposure taken at approx 40 sec intervals.

 

Dave