So how fast do the clouds move? According to my good friends at Universe today, the winds "At the very top of the cloud layers on Venus, wind speeds reach 355 km/hour (or 100 meters/second). This is the same the jet stream here on Earth."
But Mike are you sure it's not rotating? Yes, Very!! Why? Because the rotation period, aka a day on Venus is 116d 18h 0m. So you are certainly seeing the cloud tops blowing across the top of the atmosphere.
I also shot Venus in Infra Red and when you use Infra Red as Red, and UltraViolet as Blue, you can make a 50/50% mixture of those to make a fake green. Then using IR as R, UV as B and a synthetic Green you can make a false color or IR-sG-UV image of Venus. It looks like this...
The UV is actually a derotated version of 8 x 90s or 12minutes of 'sub' time. Here's the UV and IR alone. Since it was daytime and the background levels were not dark, I left it bright enough to show the daytime UV levels.
Thank so much to my friends and family for sharing these firsts with me it was quite a fine way to end my 2016 observing season. Stay tuned for the 2016 best of's!!