There's going to be only an hour or so between the sunset and the planets being too low. The sky will be probably quite bright so you'll need to be quick. Best to get everything in one field rather than trying to mosaic. I don't think there will be enough time for this. I reckon a FL of 1m or a refractor barlowed x2 would be perfect. Color would be hard. Mono or IR better given the altitude and the sky brightness.
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