Here I am sharing my most recent try with Jupiter. While I was capturing I could plainly see I had one of the Galilean moons in the field and I thought that it, along with the GRS would make a nice composition. While processing the image, I noticed what appeared to be a another moon transiting Jupiter just to the left side of the GRS. I thought I was seeing a small white moon and small shadow.
Upon consulting WinJUPOS, I found that the bright moon on the right side of the image is Io but the WinJUPOS ephemeris did not show another moon in my frame. I also learned that WinJUPOS only has this data for the Galilean moons. So I began searching for a more complete ephemeris and I came upon one at this website:
https://pds-rings.seti.orgWhen I entered the required data, the result from the tool showed Amalthea supposedly in transit at the time I was imaging as illustrated by the chart that is here as Rev. D. So naturally, I was pretty excited about that.
However, I did a little bit of research on this moon, also referred to as J5, and it seems that this is a pretty darned small moon with irregular dimension of approximately 250km x 146km x 128km. It does not seem to me that this would be visible with my equipment and the thought occurred to me that perhaps the shadow should be on the other side of what appears to be the moon as well.
So in the end, I don't believe it is a Amalthea or any other moon but if any of the very experienced planetary imagers, or anyone else for that matter, has any thoughts about this I would love to hear them.
I did this one with 8 runs of 50s at 67fps and an 80% histogram and wound up using the best 20% of those frames stacked in Autostakkert, wavelets in Registax, de-rotated in WinJUPOS and finished in Pixinsight.
I hope you like this one, comments and criticism welcome and CS and good health to all...
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