OK, I'm looking for explanations of this one ....
I was out on Tues night about 8:25pm (EST) taking some widefield images when I looked up to the NE sky and a flash of light caught my eye. At first I thought it was one of those Iridium flares that people talk about. Then it happened again, a star size pinpoint of white light that momentarily flashed and disappeared again.
I didn't have a watch but I estimated it to be about once every 6 seconds and this went on for about a minute. What's more it didn't seem to be moving at all, it was in roughly the same place the whole time.
The camera was in the middle of a 60sec exposure, but as soon as it was finished I quickly swung it round to the area where the flashing was but by the time I had set it up the flashing stopped and I never saw it again.
I estimated it to be near M15 somewhere between the constellations Pegasus and Equuleus according to CdC.
I don't think it was a plane as it barely moved if at all. Ideas anyone?
Sky chart below and, FWIW, the image I snapped after it stopped flashing
