This happened a while ago now, but I was wondering if anyone had logged something similar on the same night. On Saturday, 5 August 2017, 2:00 – 3:00am, I saw a bright flash of light right in the centre of Grimaldi. I was using a 130mm Newtonian and about a 220x magnification. It may have been a meteor strike. Interestingly I discovered that focusing in the general area of Grimaldi was difficult for several minutes afterwards. It wasn’t elsewhere. Suggesting some sort of ejecta.
Telescopes: One Newtonian, three Maksutov Cassegrains, seven refractors, and a large SCT.