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ISS Solar Transit, Jeff Kraehnke

ISS Solar Transit

Acquisition type: Lucky imaging
ISS Solar Transit, Jeff Kraehnke

ISS Solar Transit

Acquisition type: Lucky imaging

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Description

This video was taken on 28JUN2020 at 10:37:45 Central from West Allis, WI using a Lunt LS80THa/PT with double stack and ASI174mm mono camera. Captured using SharpCap. Stacked using PixInsight, Sharpened using RegiStax, and colorized in Photoshop.

The chances of capturing this transit were looking bleak with the high clouds that were overhead. The sun was fading in/out and it was difficult to get a good focus let alone figuring out the right exposure.

You'll see in the video that clouds were rolling by and I was freaking out that I wouldn't get anything so I jacked up the exposure to be able to capture at least something going by. But then the clouds started to thin and I was seconds from the transit happening. I furiously was moving the exposure slider in real-time watching the histogram and desperately trying to keep it at ~2/3rds exposed.

Luckily, at the exact moment, the clouds thinned, I dialed in the exposure, and the ISS flew by! As soon as it happened I cheered out loud to myself where I was set up in a local grocery store parking lot. I'm sure people thought I was crazy.

Enjoy.

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Histogram

ISS Solar Transit, Jeff Kraehnke

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Milwaukee Astronomical Society