I camped out in Chris and Katie's backyard last night with my Nikon D750 and telescope (Sky Watcher Evostar 72ED) to try and capture a transit of the Hubble Space Telescope (HST) across the face of the Moon. Unfortunately, I didn't capture it. I'm not too surprised... stories from people who have captured a lunar transit of the International Space Station (ISS) often describe making 4-5 attempts before success and the ISS is about 10 times as large as HST in the sky (between HST being both physically smaller and about half again further away).
This was my second attempt at a lunar satellite transit. I'd done a test shot of a transit of the Chinese Space Station (Tiangong) a few weeks ago. For that one, I had tried shooting a rapid series of shots but with the transit only lasting about a few seconds, I just was not shooting fast enough to capture it. That led to my plan for last night to try shooting 60 frame per second video with the goal of using individual frames to create a composite image. Assuming I had captured anything. Which I didn't. :-(
The evening wasn't a total bust though. On the one hand, I got useful information about trying to shoot video to capture something like a lunar transit. The high ISO I used resulted in far too much noise, so much so that I suspect the HST is there in my video but lost in the noise. I need to do some night time Moon video test shots to see how low I can set the ISO and still get decent video. I also learned that trying this when the moon is so close to the horizon (it was at only about 11 degrees, just above the trees along the back of their property) just makes it tougher since with it that low means shooting through more atmosphere and there is also more air turbulence.
Learning something new every day!
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