Inspired by RichardJ and Dennis results with capturing Mars asteroid moons I decided to try myself.
With long FL I had to Binx2 images using luminance and I could faintly see Phobos close to Mars. I used 13fps full gain over 60 sec period every 15mins before I commenced my the RGB set. Unfortunately cloud set in before I could get Phobos to turn right around and come back in. Really pleased with the result, Deimos was a bit too far away at my long FL.