Best of AOP - Planetary Nebulae

NGC 246

NGC 246 is a rather lonely and large planetary nebula in Cetus. In this example the distorted sphere of gas has many thin and thicker regions giving it an irregular "texture." Like most spherical clouds of gas the outer edges seem brighter than the center which appears void. This is a perspective effect in that more line-of-sight gas is observed towards the outer portions.

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Last Updated: 19-Jun-2014

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About This Image

Click on image for larger version.

Equipment

20in RC Optical Systems telescope Operating at f/8.1

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

The central star of this nebula is actually two stars close in angular separation. Unfortunately the bloom of the main

star destroyed the companion. Instead of trying to reconstruct it after deblooming- a choice was made to present

this as a single round star.

Taken in poor seeing. The guide star was fainter than 13.5 - making color acquisition very difficult.

Luminance = 90 minutes binned 1x1

Red = 10 minutes binned 2x2

Green = 10 minutes binned 2x2

Blue = 10 minutes binned 2x2

Minimum credit line: Jeff Cremer/Adam Block/NOAO/AURA/NSF