The Skull Nebula


The Skull Nebula, also known as NGC246 or Caldwell 56. This is a planetary nebula in the constellation Cetus. The nebula gets its name from its appearance. It is approximately 1,600 light years away from Earth. A planetary nebula is an emission nebula consisting of an expanding, glowing shell of ionized gas ejected from a red giant star. Also in the image to the lower right is NGC255, a barred spiral galaxy. To the left of NGC255, and lower left of the Skull Nebula, is PGC2689, a faint spiral galaxy.

Image Details:

Celestron 9.25” EdgeHD

Starizona Hyperstar V4 f2.2 

Celestron CGEM DX mount on a SkyShed Pier in a SkyShed POD

ZWO ASI2600mc-pro Imaging Camera 

ZWO ASI224mc Guide Camera 

Svbony 60mm Guidescope  

ZWO ASIair Pro for image acquisition and gear control.

Image Specs:

80 x 180 second exposed images at Gain 100

Camera sensor cooled to -20°C

No filters used as the ASI2600mc-pro has the built in IR cut window.  

Calibrated (with darks, flats, dark flats) and stacked in Astro Pixel Processor and post processed in PixInSight.



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©2020 by Tim Connolly / Connolly Astronomy / AstroNorth.com