I discovered at an early stage that you cannot get away with a hand held camera. Even the steady hand of a surgeon might struggle to hold his lens sufficiently immobile for a night time exposure at a quarter of a million miles away from his subject. So having acquired a tripod, I tried again, using my Minolta 75-300 mm. lens on its maximum extension. Now this is decent lens for a zoom and I ended up with respectable pictures, but only very small ones after cropping so far into the frame.
Last night I decided to stack lenses in a reckless fashion to see what I could do with a big image. I used my elderly Sigma 400mm f5.6 M42 lens and two doublers, a Helios and a Tamron. Effectively I was trying to focus and set aperture and exposure manually for the equivalent of a 1600mm lens. This is not easy; at least it's not easy for me. I made numerous mistakes. However I finally got a couple of presentable pictures, of which the one below is the better, in my opinion.
I do not claim that this picture has huge technical merit. I hope to do better. Nevertheless I am not dissatisfied with it for a first effort with this type of set up.