Strange Green Light
Can anyone shed any light on this light I captured in the small hours of the 13th? The light appeared at 00:53 pointing somewhat East, then moved to point almost straight up at 00:56 and stayed perfectly still that way for 2 minutes before disappearing completely.
This photo was taken pointing roughly North from the Highlands.
The colour resembles aurora, but the behaviour does not and the geomagnetic activity was low, I checked at the time. The first thing which came to mind was a search light of some sort, but I wasn't sure why a bright green light was being pointed straight up, not moving. The second thought, arguably more plausible, was a laser being used to polar align a star tracker, which would make sense given this was the Presides peak - that's what I was shooting too and with a tracker (no laser) - but the beam appeared far too broadly spread imo, and it wasn't pointing at Polaris. I did consider the broadness could be as a result of the laser being swept across the sky as my camera shot a 15 second exposure, but the light has the same contour lines in the following 6 photos, so that's unlikely.
If anyone has any ideas, cool or simple, please share.