Got a slightly curly one. Out stargazing last weekend, newish moon, no cloud cover at all, about 90min after sunset (winter) and already a dozen mundane satellites spotted - two oddities. These announced themselves about 20 minutes apart, each with a flash on the periphery of my eyesight, and when I zoomed in on the area, they flashed again. Then they just flared mildly about every ten seconds for a couple of minutes and were no more. They had a definite linear trajectory, same as a regular satellite, but that intermittent slow brightening, which was definitely a new one to me.
I have heard about iridium flares from orbiting craft. Is this the most likely explanation?