Phase diagram for EG Cep taken on 4 nights

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Phase diagram for EG Cep taken on 4 nights

Postby Dave Smith » Sat Jan 07, 2017 2:08 pm

Following on from my recent first attempt at variable star observing with a CCD camera

I have continued taking measurements of this star and here is the resulting phase diagram. As I do not yet possess a V filter I used a green one instead, on the theory that it would be the closest approximation. The BAA have now advised me that I should now get a V filter.


The time period of this system is near 13 hours so was unable on any occasion to see the full cycle. I was using the plate solving in SGPro to get the star in the middle of my FOV and did a 25 sec exposure every five minutes when the sky was clear. The scope used was my Megrez 90 with 0.8x FF/FR and an Atik 460EX camera.

I found this quite exciting and intend to try some of the other stars in the beginners list.


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Dave Smith
Black Dwarf
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