Object ALCHEMY looks to be too difficult from the UK.
Have looked at all the passes during the coming 10 days and none look to be
practicable.
The sky will not be dark enough for the early evening passes around 16h-17h
and the later ones will be unilluminated and a few ‘000 km distant. They
also tend to be low in the sky.
Have you tried flagging this on the <seesat-l@satobs.org> mailing group?
Cheers, Richard