Continuous 2nights were very clear though with mediocre seeing.
Upper atmosphre was unstabe maybe by jet stream ......for 2 hour observation there was only 5-10 minutes good seeing.
l saw Mars was approaching to a very dim fixed star (limiting mag of my 13")
lf that was a fixed star l could find Mars revolution speed.
Mars went its 2 diameter for 2h 15 mins.
so, v = 12000km / 8100 sec ....= 1.48 km / sec
( as Mars-star position was tilted 40* , apply sin value,.....then v = ca 2km/sec
This value is far from paper value.
So, l think the fixed star was not a fixed star...... something other...!!...( moon Phobos? )
To observe the position change-move of SPC & environ we could inspect the Martian libration movement...maybe,