WinJUPOS composite of three 180 second exposures taken at dusk on 17 Sep 2018 (capture midpoint at 6:35 pm with sunset taking place at 5:56 pm). Half an hour imaging session between 6:21 and 6:54 pm local Canberra time. The three stacks combined into this image are consecutive and cover 9 minutes elapsed time.
I've applied the same workflow as for 14 Sep image producing both drizzle and non-drizzle stacks. There is a slight decrease in disk size with Mars shrinking by half a second. Weather conditions in Canberra were perfect for astronomy that week and I have left the scope outside for to acclimatise.
Aurorae Sinus, Argyre, Solis Lacus and rising Tharsis Ridge are all on view with very deep shadow cast by a long orographic cloud west of Arsia Mons. The cloud was first detected in Mars Express images four days earlier and indicates prevailing wind direction in that region::
https://www.space.com/42257-strange-mars-cloud-on-mars-photos.htmlhttps://www.esa.int/spaceinimages/Images/2018/10/Mars_elongated_cloud_17_SeptemberWorking through additional datasets from the period - long weekends always help! :-)
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