Hemisphere:  Southern  ·  Constellation: Carina (Car)
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Keyhole Nebula (f/20), 



    
        

            Todd
Keyhole Nebula (f/20)
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Keyhole Nebula (f/20)

Acquisition type: Lucky imaging
Getting plate-solving status, please wait...
Keyhole Nebula (f/20), 



    
        

            Todd
Keyhole Nebula (f/20)
Powered byPixInsight

Keyhole Nebula (f/20)

Acquisition type: Lucky imaging

Technical card

Imaging telescopes or lenses: Skywatcher 200/1000 Newton 8" PDS

Imaging cameras: QHYCCD 163C

Mounts: Celestron CG5 Mount

Guiding telescopes or lenses: ZWO 30F4 Guidescope

Guiding cameras: QHYCCD QHY5L-II-M

Software: Pixinsight 1.8  ·  GIMP

Accessory: 4x Powermate


Dates:Dec. 4, 2020

Frames: 40x10" (6' 40")

Integration: 6' 40"

Avg. Moon age: 18.61 days

Avg. Moon phase: 84.21%


Basic astrometry details

Astrometry.net job: 4066561

RA center: 10h 44' 48"

DEC center: -59° 38' 56"

Pixel scale: 0.188 arcsec/pixel

Orientation: 137.974 degrees

Field radius: 0.152 degrees


Resolution: 4626x3522

Data source: Backyard

Description

Continuing my experiment with f/20 deep sky imaging, this image compared to my previous HOO at 765mm suggests there is marginal benefit at best of imaging large DSOs at 4000mm. And perhaps it was the additional 100mm of aperture that provided that benefit, and not the focal length.

Anyway, if you can over look the trailed stars (no point blinking: every sub trailed on the CG5), its not too bad

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Keyhole Nebula (f/20), 



    
        

            Todd