I was taking some wide field shots Friday night of the Elephant Trunk Nebula area which I have never shot before. Didn't really get a discernable shot of the thing but I realized I need more exposure time and a more sensitive camera for this jewel. What I did get is what I think is an Iridium flare spaced over two pics.
When I plugged in the time of the shots and area of the sky into Stellarium, it indicates that the satellite Iridium 52 was passing really close to this region. The first pic is the Stellarium screen capture. The second pic is two pics stitched together to give the total view.
What is strange about this is that it seems to brighten then dim then brighten/dim again. Everything I've read about Iridium flares is that they brighten and then dim due to reflecting solar light from their panels. I haven't seen anything that indicates a repeating pattern. I guess if this is one that had failed and was tumbling end over end it could generate this pattern.
Anyway, the shots were 4 minutes long with a 15 second interval between them. The space between the one in the lower right corner is due to the shot interval. According to the data from Stellarium this thing is 485 miles up in orbit. Just thought this might be of interest.