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M 57 – The Ring Nebula

The Ring Nebula, HaRGB

May 27th, 2018

I set a goal to capture the faint outer Ha shell on this image, and I achieved that goal, which is very satisfying. This is a huge improvement over my last ring nebula image (taken in 2015 with totally different equipment).

The ring nebula is a bright planetary nebula in Lyra, around 2,000 light years away. It is a star rapidly shedding its outer layers into space, which are then ionized by the hot white dwarf in the middle. Here hydrogen is showed in red and oxygen in green/blue.

Captured on: May 25th and 26th, 2018

Gear:
AT6RC, 1370mm @ F/9
ZWO ASI 1600mm-C
ZWO EFW-8
ZWO filters
Skywatcher NEQ6 Pro
Orion SSAG

Acquisition:

Hydrogen Alpha: ZWO 7nm Ha filter(1.25″), 80x180s, -10C, Gain 200, Offset 50
Red: ZWO Red filter(1.25″), 60x60s, -10C, 1×1 bin, Unity Gain
Green: ZWO Green filter(1.25″), 60x60s, -10C, 1×1 bin, Unity Gain
Blue: ZWO Blue filter(1.25″), 60x60s, -10C, 1×1 bin, Unity Gain

Total Acquisition of 7hrs

Software:
PS, DSS, PHD2, SGP, EQMOD

Thanks for looking!