First Dark Sky

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Ring Nebula

November 14, 2015

After months of frustration I have finally succeeded in processing an image taken with Richards Nightscape CCD. Most of my issues (OK processing issues :) ) boiled down to the improper Bayer Matrix setting in DSS. Being a DSLR guy the transition to CCD almost had me pulling out what hair I have left.

As you know Richard was gracious enough to loan me this C-14 Edge HD SCT along with a very nice CGE Pro mount plus a Hyperstar adapter and the Celestron Nightscape 10.2 PM CCD camera.

Imaging with this equipment package has been most pleasurable however I had yet to successfully process an image until last night.

Attached are two relatively easy targets that I had imaged back in August. These were imaged at native F11. each image has a total of 21 - 3 min subs and 21 dark frames subtracted to remove hot/cold pixels and the minimal thermal noise. No flats or bias were used.

Russ Ruggles

The following was retrieved from Wikipedia, the free encyclopedia, at en.wikipedia.org/wiki/Dumbbell_Nebula on November 20, 2015

The Ring Nebula

"The Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf."

The license terms of this written work from Wikipedia may be found at http://creativecommons.org/licenses/by-sa/3.0/

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