Hi David,
Just checked the time of your observation with Jupiter 2.
The UTC would have been 11:30 which gives a CMII of 299.7 degrees. There is a bright spot in the SEB which is the brightest spot at all wavelengths currently on Jupiter, it brightened on about Nov 9th and it is widely thought that this is the precoursor to the revival of the SEB, it is at approx CMII 290 degrees.
This feature has become elongated over the last few days and has developed a dark tail like feature, this may be a shadow thrown by the bright spot, which seems to be at great altitude or may be a hole in the clouds. There is considerable research proceeding on this matter.
Regards
Trevor
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