Keith, are you certain you saw Amalthea? I believe only a handful of people have ever visually seen it.
I’ve been trying for 2 years in the 32” without success, and I have the added advantage that it passes near zenith versus down so low in the Texas sky. That would be quite a fantastic observation.
I’ve learnt a lot from my unsuccessful attempts and am really looking forward to the June and July windows coming up.
I was observing with Larry Mitchell and we were working on his advanced observing list which featured objects observed by Barnard. Hence looking for Amalthea. We had detailed charts and when we found the moon, or suspected it at least, we marked its position on our chart and left the scope tracking on the field. When we checked it again about 30 minutes later and we could clearly see it had moved.
We were using an 8mm Delos, ~400x.
We were quite lucky in that two events happened to coincide on the same night: A wonderfully steady and transparent night (anyone remember Tuesday night at TSP last year?) and Amalthea was at (or very near) greatest elongation thus well away from the glare of Jupiter.
Once we had it nailed down we were able to see it in Larry's 20" f/5 and a friends 12 1/2" f/5. At ~15th magnitude it was pretty tough in the 12 1/2", but we could make it out.
We had quite a few people stop by and take a look, perhaps some are reading this thread and can share their observation.