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ISS solar transit animation, 17th June 2022


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Here's a slightly better ISS solar transit than the one I posted a couple of days ago. They are usually bang on time, but this one was about 7 seconds late. I guess it must be something to do with orbital corrections. ISS angular size: 50.03″; distance: 552.29 km. Transit duration: 0.76 s

As you can see, seeing was very wobbly in the heat and it was a bit breezy, with the result that the image is boiling somewhat and the ISS path appears to have a bit of a curve.

Coronado PST, TAL 2x barlow, ZWO ASI290MM cam. c0.65ms exposure, c 35fps. Captured with Fircapture.




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