Observing Log for Mike Durkin


9/30/2018 8:30PM-10:00PM
Locust Valley, NY
Transparency: 8/10, Seeing 3/5
Temperature: about 60-65 degrees
Equipment: Hutech modified Canon T3i

I wanted to test out and see if I could use the Bower 500mm catadioptric lens for DSLR photometry. I decided to use AG Dra as my target since according to the AAVSO data, it should be somewhere around magnitude 9.5-9.6, which is about the magnitude that I think this lens might be good for. Since the field of view is fairly tight, roughly 1-2 degrees, it took me about an hour to get the star centered. I had to star hop Kochab in UMi, since that was bright enough to show up in live preview.
I eventual was able to take some measurements of AG Dra, so I will eventually see if I took proper images and if processing those images is able to come up with a reasonable value.


9/30/2018 12:00AM-2:00AM
Locust Valley, NY
Transparency: 8/10, Seeing 3/5
Temperature: about 60-70 degrees
Equipment: Hutech modified Canon T3i

Testing tonight to see how well the tracking of the Star Adventurer out would do with a lens at 300mm. It seems that at 300mm, I would probably have to discard about 1/4 to 1/2 of the total frames, which is a bit more than I woud like. The exposure limit for my lens at 300mm is about 45 seconds to 1 minute. The area I focused on was M31, but towards the end I kicked one of the tripod legs a little and didn't bother trying to find it in the field of view again. I am wondering if for the Star Adventurer mount I should limit myself to 200mm, unless I want to do 30-45 seconds as a limit for the light frames.


9/3/2018 10:00PM-11:00PM
Locust Valley, NY
Transparency: 9/10, Seeing 3/5
Temperature: about 75-85 degrees
Equipment: Hutech modified Canon T3i

It has been a year exactly since my last DSLR photometry session, and like last year I measured P Cyg and VV Cep. Last year I measured CH Cyg as well, but I did not have time for that. I also wanted to test out the 500mm lens for photometry, but I did not get tie for that either.


9/2/2018 10:00PM-12:00AM
Locust Valley, NY
Transparency: 8/10, Seeing 3/5
Temperature: about 70-80 degrees
Equipment: 15x70 binoculars

Measured variable stars R Aql, Z UMa, V Aql, V450 Aql, X Her and IQ Her.
Before I finished I wanted to see if I could make out any deep sky objects with the binoculars. I was not able to make out globular cluster M75. I think I was able to make out M72. And I was able to see the Saturn Nebula (NGC 7009), although it looked like a star rather than anything else. I guess this is where a nebula filter could be used to make the determination.



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