The Owl Nebula  (ふくろう星雲) Messier 97

After looking at various pictures, I found that the nebula is surrounded by the red color of Ha.
I emphasized that.
But this planetary nebula is also big.

色々な写真を見てたら、この星雲の周辺はHaの赤で円形に包まれていることがわかったので、
それを炙り出してみた。
しかし、この惑星状星雲も大きいな。


Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 12.2%)
Shot Date 23rd / Apr / 2023 22:20 (UTC+7)
TS RC10 Trus  (250mm,F/8.0,f/2000mm)
filter: Optolong 3nm Ha,Oiii Filter
Ha: 27X120Secs 54minutes
Oiii: 27X120Secs 54minutes

Total 1 hours 48minutes

Palette: Target :SHO (Syn)
Gain: 200 BIN2 Mono
CCD:ZWO294MM-Pro
Mount :iOptron CEM70G
Guide: SVBony 60mm F/4, QHY290C (Dithering every 5 shots)
Controler:NINA,PHD2
Pre-Processing APP  Drizlle None
Post-Processing PI,PS 
Shot By Taro Seki Astropical.uk

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