Weird anomaly in my California Nebula pic - Forums

Topic starter

Oct 11, 2024

Hi,

Has anyone seen anything like this before, the "streak" under the California Nebula? It is there for all of my California subs throughout the whole night but not in the preceding subs for my other target, the Wizard Nebula, which I was also taking last night. I'll do some more testing tonight.

Stellarvue SVX140T with Flattener
ASI2600MC
L-Ultimate filter (housed in an EFW)
600 second subs
100 gain

Thank you!

CS,
Rob

PS. Yes, I know I have some tilt.

Rob Calfee

Topic starter

Oct 11, 2024

Here is a tiff

Rob Calfee

Topic starter

Oct 11, 2024

Here is a tiff of the Wizard Nebula just before I switched targets.

andrea tasselli

Frequent contributor

Oct 11, 2024

A streak is usually an indicator of an off-side bright stars playing havoc with some part of the optical train, be it a flattener or a filter.

Rob Calfee

Topic starter

Oct 11, 2024

andrea tasselli:
A streak is usually an indicator of an off-side bright stars playing havoc with some part of the optical train, be it a flattener or a filter.

Maybe this is from Menkib? Or HD24960?

andrea tasselli

Frequent contributor

Oct 11, 2024

If you plate-solve it in astrometry.net you can see how it relates to nearby stars using the WWT function. Most likely there is bright star in the direction pointed by the steak itself although this is no guarantee.