ABout 40 years ago, I made a challenging observation, visual with a 200mm F/6 Newton, of the 13th magnitude quasar 3C273 in Virgo.
The sheer distance of 2 bollion lightyears made your head spin around.
Tonight I imaged quasar 3C309.1 in Ursa Minor; it has magn 16.8 and a distance of 8 billion lightyears.
So many stallites, here is a stack that shows all satellite tracks over a 15x120s or half an hour period;
