Hi Paul,
They look like trails of hot pixels. Is this an aligned sum of several individual exposures?
(IC1296 brings back memories. It was a test of how deep I could go with my first astro camera, a surveillance camera which I modified for long exposures in 2002).
http://www.threehillsobservatory.co.uk/astro/1004xcam.htm
The resulting LRGB image of M57 even made it into Astronomy Now. Cutting edge then !