Hi Richard- I’ve never captured a transit before (although it is on my wish list) but from what I’ve seen the ISS will just be a silhouette against the bright moon and I think that’s really the shot you’re looking for anyways. So adjust your video frame exposure and gain to get nice lunar detail and that’s all you need to worry about. If you had a second setup or want to attempt an ISS capture separate from the moon you could attempt with higher gain.
I just checked the predictions and it’s just missing the moon from my location but i get another go on the 23rd which will be right on target
Good luck and please post your results!
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