The Swan Nebula A.K.A Omega Nebula (スワン星雲) Messier 17
Re-process
The central part of this nebula was extremely bright, and when I tried to extract the structure of the swan's head and buttocks, the central part was saturated, and it was difficult to extract anything other than the central part.
This time, I used Generalized Hyperbolic Stretch (GHS) and adjusted the Tone curve for each brightness level, and managed to see details other than the center.
However, I got too carried away and sharpened it too much.
This time, I used Generalized Hyperbolic Stretch (GHS) and adjusted the Tone curve for each brightness level, and managed to see details other than the center.
However, I got too carried away and sharpened it too much.
この星雲は中心部が極端に明るく、白鳥の頭の部分やお尻の部分の構造を引き出そうとすると中心部が飽和してしまい、なかなか中心部以外を引き出せなかった。
今回はGeneralized Hyperbolic Stretch(GHS)を使って、輝度レベルごとにToneカーブの調整をしてなんとか中心部以外の詳細を見ることができた。
といっても調子に乗りすぎてシャープにしすぎてしまったが。
Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 0.3％)
Shot Date:27th / Aug / 2022 20:07 (UTC+7)
Re-process: 1st/Jul/2023
Celestron C11 HyperStar C11 V4 (2800mm F/1.9 f/540mm)
filter: Baader Highspeed Ultra Narrow band filter
Ha 3.5nm:10X120Secs 20minutes
Oiii 4.0nm:10X120Secs 20minutes
Sii 4.0nm:10X120Secs 20minutes
Total 1 hour
Palette: Target :SHO
Gain: 120、BIN2
CCD: ZWO ASI294MM Pro BIN 2
Mount :iOptron CEM70G
Guide: SVBony 60mm F/4, QHY290C
Controler:NINA,PHD2
Pre-Processing APP Drizzle X1,0 Droplet Ha:1.0,Oiii 1.0.Sii 1.5
Post-Processing PI,PS
Shot By Taro Seki Astropical.uk
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