Three Rings of M57 (Kevin Morefield)

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

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Three Rings of M57

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Three Rings of M57

This is a combination of data from my 16803 STX and 8300 STT at .73 and .43 image scales. I set out to capture the third ring with the large pixel camera but the filter wheel died mid-capture.

I ended up with 166 twenty minute exposures between the two cameras, using LRGB and SHO filters. Of course, the ring itself is many magnitudes brighter than the 2nd and 3rd rings so I had to combing each from different stretches and from different filter combinations. For example, the luminance from the 3rd ring is Ha from both cameras, the luminance channel for the main ring is all narrowband. Color is from the RGB. 55 hours of data when into the mix in one form or another.

I had trouble getting the data at different scales to register so a master from each camera was created and these were manually aligned and scaled in CCDStack. Layer blending was done in Photoshop CC. The narrowband luminance channel for the main ring was created in PI. Whatever worked...

Much was learned trying to do this!

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Status	Advanced success
Started	...
Astrometry.net job	2166850
PixInsight job	JO8EKJO4ZYEC2AWIZ912N1U8BBQXZ2XM
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h53m30s.370
RA (top/left)	18h54m09s.510
RA (top/right)	18h53m18s.230
RA (bottom/right)	18h52m51s.211
RA (bottom/left)	18h53m42s.583

Dec (center)	+33°02′30″.33
Dec (top/left)	+33°02′22″.17
Dec (top/right)	+33°10′17″.39
Dec (bottom/right)	+33°02′37″.33
Dec (bottom/left)	+32°54′41″.30

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Three Rings of M57

Three Rings of M57

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Three Rings of M57

Three Rings of M57

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