Hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  CXO J17583+6639  ·  Cat's Eye Nebula  ·  IC 4677  ·  MQ J175745.43+664111.4  ·  MQ J175801.92+663547.3  ·  MQ J175804.91+663857.1  ·  MQ J175806.53+663934.3  ·  MQ J175806.66+663929.8  ·  MQ J175810.25+663905.1  ·  MQ J175920.97+664048.2  ·  MQ J175947.60+664014.5  ·  MQ J175952.07+663806.7  ·  MQ J180009.98+664200.5  ·  NGC 6543  ·  NGC 6552  ·  PGC2688666  ·  PGC2689421  ·  PK096+29.1  ·  RX J17591+6635  ·  RX J17594+6638
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NGC6543 - Cat's eye nebula in Short Exposures, 



    
        

            Filippo Scopelliti
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NGC6543 - Cat's eye nebula in Short Exposures

Acquisition type: Lucky imaging
Getting plate-solving status, please wait...
NGC6543 - Cat's eye nebula in Short Exposures, 



    
        

            Filippo Scopelliti
Powered byPixInsight

NGC6543 - Cat's eye nebula in Short Exposures

Acquisition type: Lucky imaging

Technical card

Imaging telescopes or lenses: Nauris Mirrage 600 mm f 3,8 Dobson

Imaging cameras: ZWO ASI294MM-Pro  ·  ZWO ASI294MC Pro

Mounts: StellarCAT+Nexus DSC

Focal reducers: TeleVue Paracorr Type-2

Software: FireCapture, SharpCap, AS3, Astrosurface, WinJupos, PixInsight, Photoshop, SiriL

Filters: Astrodon Tru-Balance Luminance E-Series Gen 2 31mm

Accessory: Pegasus Falcon Rotator Derotator


Dates:June 11, 2021

Frames: 13400x1" (3h 43' 20")

Integration: 3h 43' 20"

Avg. Moon age: 0.96 days

Avg. Moon phase: 1.03%


RA center: 17h59m05s.281

DEC center: +66°3750.66

Pixel scale: 0.374 arcsec/pixel

Orientation: -15.608 degrees

Field radius: 0.192 degrees

WCS transformation: thin plate spline

More info:Open 


Resolution: 3145x1920

Data source: Backyard

Description

This is a preliminary result obtained with the very short exposures only, planned for imaging the bright core. Following the precious help and suggestions of my "DSO lucky imaging" mentor Jeffbax Velocicaptor who produced at my opinion the best amateur image of this object, I planned to make a session of very short exposures for the bright core and a further session of longer exposures for the extensions. After the first night in which I captured 8000 x 500 ms frames with my mono camera on 11th June and 5400 x 1 sec with my color camera on 11th July, considering that in my place I am experiencing the worst weather ever, frustrated for this reason I decided to try to process the entire image with the very short exposures only. It was obviously difficult to manage the noise and the lack of signal of the extension. I love this object, visually also, so I will complete the process with the longer exposures session.

Nauris Mirrage Dobson 600mm f3.8
StellarCAT - Nexus DSC
ASI294MM 500 ms x 8000 (66 min) Gain 400 L-pro filter
ASI294MC 1 sec x 5400 (90 min) Gain 360 L filter
Dark x 50
Paracorr type 2
Falcon derotator
SharpCap - SiriL - PixInsight - PhotoShop

Comments

Revisions

    NGC6543 - Cat's eye nebula in Short Exposures, 



    
        

            Filippo Scopelliti
    Original
  • Final
    NGC6543 - Cat's eye nebula in Short Exposures, 



    
        

            Filippo Scopelliti
    D

D

Description: I have to say that I am quite obsessed with this object so I am happy I had the opportunity to get the acquisitions to complete the previous version I showed some time ago. I had the opportunity to spend a few nights under a very dark sky (SQM 21.6), at about 2000m of altitude with excellent seeing and transparency, ideal conditions. The object is complex to process because it was not enough to compose an HDR to best represent all its components, the central core, the concentric shells and the faintest extension. I essentially gradually stretched the image, in an incremental manner, masking the areas as they begin to become saturated. This allowed to get the image starting from a single exposure, except for the central core which inevitably requires a separate session. I am also very happy with the results of the masks that I applied to the support for the secondary to eliminate the spikes, as the guys from Chilescope kindly showed me. It was very nice to spend those nights because I had never had the opportunity to observe and image with my new instrument in such conditions. It is amazing how much more signal can be obtained in the absence of light pollution and how much easier it is to process images essentially without gradients. I hope you like it. Nauris Mirrage Dobson 600mm f3,8 StellarCAT - Nexus DSC ASI294MM 500ms x 10.000 - 1sec x 5.000 ASI294MC 1sec x 5400 (90 min) Dark x 100 Astronomik L2 Paracorr type2 Falcon derotator SharpCap - SiriL - PixInsight - PhotoShop I also have to thank my mentor of the short poses Jeffbax Velocicaptor who in my opinion produced the most beautiful amateur image of this object that I have ever seen as I said the other time but above all my wife who makes me play while she takes care of everything 😊.

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NGC6543 - Cat's eye nebula in Short Exposures, 



    
        

            Filippo Scopelliti