Strange artefact - help needed!

Questions and answers about processing in StarTools and how to accomplish certain tasks.
Rowland
Posts: 235
Joined: Sat Mar 05, 2011 10:54 pm

Re: Strange artefact - help needed!

Post by Rowland »

If you haven't done so, weeding out the subs might improve things. I think Che is correct. Looks like a bump or some other mechanical interference.
almcl
Posts: 263
Joined: Wed Jan 21, 2015 7:15 pm
Location: Shropshire. UK

Re: Strange artefact - help needed!

Post by almcl »

It was guided but unfortunately there were problems with the DEC axis that night (since resolved) and those are actually the better subs. The bad ones were awful:
double stars.jpg
double stars.jpg (230.99 KiB) Viewed 2441 times
Ursa Major is getting a bit low, so next spring before I can get some more data
Skywatcher 190MN, ASI 2600 or astro modded Canon 700d, guided by OAG, ASI120, PHD2
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