Hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  IC 4677  ·  NGC 6543  ·  NGC 6552  ·  PK096+29.1
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NGC 6543 Cat's Eye Nebula, 



    
        

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NGC 6543 Cat's Eye Nebula

Getting plate-solving status, please wait...
NGC 6543 Cat's Eye Nebula, 



    
        

            star-watcher.ch
Powered byPixInsight

NGC 6543 Cat's Eye Nebula

Equipment

Imaging Telescopes Or Lenses
Sky Watcher Explorer 130PDS
Imaging Cameras
Canon EOS 70Da
Mounts
iOptron GEM28
Filters
Astronomik UV-IR Block L-3 Clip Filter
Accessories
Lacerta LED Flatfield-Box 185mm · Baader MPCC Mark 3
Software
Pleiades Astrophoto PixInsight · Adobe Lightroom 6 (Adobe Lightroom)
Guiding Telescopes Or Lenses
TS-Optics Deluxe 50 mm Guiding/Finder scope with micro focusing
Guiding Cameras
Lacerta MGEN 2

Acquisition details

Dates:
April 28, 2022
Frames:
Astronomik UV-IR Block L-3 Clip Filter: 104x120" (3h 28') ISO1600 f/5
Integration:
3h 28'
Darks:
30
Flats:
58
Bias:
32
Avg. Moon age:
27.27 days
Avg. Moon phase:
5.69%
Bortle Dark-Sky Scale:
5.00
Temperature:
10.00

RA center: 17h59m12s.56

DEC center: +66°3818.4

Pixel scale: 1.291 arcsec/pixel

Orientation: -1.210 degrees

Field radius: 1.179 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 5472x3648

Locations: Derendingen 454m, Solothurn, SO, Switzerland

Data source: Backyard

Description

This time especially the right upper corner is problematic (left upper corner too, but not that much as the right upper corner). At least not all 4 corners are affected in the same way... 
I'm unsure what's the reason for this... So far, after reading a lot about the topic, I think the problem is:
- working distance to the corrector not accurate
- small remaining tilt

On the single sub only the right bottom corner seems to be OK. 

Please advise if I'm wrong.

I'm already thinking about a 2" screw adapter for the MPCC to prevent tilting...

And by the way, this is a very faint planetary nebula...

Comments