I have a 6A fuel scoop on my Asp Explorer, and I have found it starts scooping with a temperature of just under 50% (albeit somewhat slow). Get in close and it hauls in fuel at 878/s! Mind you, if you have an 8A fuel scoop on a vessel (it is EXTREMELY expensive at over 200Mcr) it can fill up 32T tank in around 12 seconds!!!

If you are off sightseeing (and also want to hit the 5,000LY for Prof Palin) you might want to take a wander over to BD+55 191 (I will check that when I am next in game). About 8,000LY out, in a nebula, and the Primary Star is quite large (101 Solar Masses). Take plenty of sun block!