Quote:
Originally Posted by glend
Could be a light leak. What camera are you using? What were the circumstances of the shot, was it inside an observatory, outside on a tripod, any light sources nearby, etc?
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Sorry. Should've given more info. It's a QHY8 and running outside on a tripod. No significant light sources nearby ... and given the location of the halo is the same in all frames across 4 hours then I'd
guess it couldn't be a nearby light source.
I'll check for light leaks. Thanks for that suggestion.
EDIT: Just thought, the dark frames don't have a halo, so presumably this suggests no light leak??
Quote:
Originally Posted by RickS
It's common for very bright stars outside the FOV to leak into it but that usually shows up as a gradient or rays pointing towards the star. An arc like that is probably a reflection off something shiny in the imaging train. Take a careful look for anything that isn't blackened.
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Hmm. Thanks for that info. That helps narrow it down. Will have a peer around inside.