What is this in my sub?

[cgarry]

I am in the process of getting my new 460ex DSO imaging setup up and running.  I have quite a few questions to ask, but will start with what is hopefully a simple question.

I am getting what looks like wondering hot pixels in some of my subs.  Since these are just individual subs and not a stack of subs I do not see how a hot pixel could move around!

This is a resized and stretched 30 minute Ha sub:

And this is a full-sized crop of the artefact in question:

Does anybody have any idea about this?

Thanks,

Chris

[IanL]

If it is on just one sub, a cosmic ray hit seems most likely (well the charged particles resulting from a cosmic ray hit on the upper atmosphere to be exact),  Depending on the angle the particle travels through the chip you can get a blob or a short/long streak like this one.

[swag72]

I get these from time to time on my 460 - They stack out, so don't worry about them!

[cgarry]

Thanks for the explanation Ian.  Now I know what the cause is, I think they are very cool!

Cheers,

Chris

[ollypenrice]

I'm sure Ian's right. This is what stacking's all about...

Olly