M57 - The Ring Nebula - my second attempt after a year of astrophotography (Cosgrove's Cosmos (Patrick Cosgrove))

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: IC 1296 · M 57 · NGC 6720 · PK063+13.1 · Ring Nebula

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M57 - The Ring Nebula - my second attempt after a year of astrophotography

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M57 - The Ring Nebula - my second attempt after a year of astrophotography

Messier 57 - The Ring Nebula. I revisited this famous object after a year since my first attempt. This is tough object for my scope and it is very small. M57 isa planetary nebula - located in the constellation of Lyra, and is about 2500 light years away. The central "teal" color in the ring is from doubly ionized oxygen emission lines at 495.7 and 500.7 nm. These emissions only occur only in conditions of very low density containing a few atoms per cubic centimeter. You'll notice that the outer part of the. ring is reddish in color and this is caused by hydrogen emission at 656.3 nm. Much more detail than my first effort - but still so far from perfect - always more to learn!

I had a hard time processing this image. There is a lot of ring detail in the red layer but the green and blue layers have soft relatively featureless images. Tough trying to pull the signal out. I expect I will reprocess this one again in the future...

This image resulted from 95 x 120 second captures. Captured with a William Optics 132 mm FLT APO scope on an IOptron CEM60 mount. Camera was a ZWO ASI294MC-Pro. Capture was done using Sequence Generator Pro and PHD2 Guiding. Processing was with DeepSky Stacker, Pixinsight, and Photoshop.

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Status	Advanced success
Started	...
Astrometry.net job	3686025
PixInsight job	VX7RYCRNADI25G20J1B3JV0SV5IH8QV2
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h53m29s.53
RA (top/left)	18h52m14s.83
RA (top/right)	18h52m54s.58
RA (bottom/right)	18h54m43s.76
RA (bottom/left)	18h54m04s.77

Dec (center)	+33°02′59″.2
Dec (top/left)	+33°17′27″.2
Dec (top/right)	+32°43′00″.4
Dec (bottom/right)	+32°48′31″.8
Dec (bottom/left)	+33°22′57″.5

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M57 - The Ring Nebula - my second attempt after a year of astrophotography

M57 - The Ring Nebula - my second attempt after a year of astrophotography

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M57 - The Ring Nebula - my second attempt after a year of astrophotography

M57 - The Ring Nebula - my second attempt after a year of astrophotography

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