The Chinese Dragon Nebula (中国龍星雲) NGC6559

Lucky Image suddenly cleared up at midnight.
Just east of Lagoon Nebula, many are supporting nebulae taken with Lagoon, but the dragon-like central dark belt in Chinese paintings has long been a concern.
Clouds were avoiding and flowing only around here, and I was able to shoot for less than two hours without hearing the unpleasant warning sound of PHD2.
It's been a while since I used the L-eXtreme filter for OSC shooting, but after all L-eXrreme gives a good red colour.

深夜に突然晴れたLucky Image。
Lagoon Nebulaの直ぐ東にあり、多くはLagoonと一緒に撮影される脇役的な星雲ではあるが、中心部走る暗黒帯は昔から気になっていた。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 7.2%)
Shot Date :2nd / Jun / 2022 2:42 (UTC+7) Start
TS RC10 Truss Prime Focus(250mm F/8 f/2000mm)
filter: Optolong L-eXtreme
L-EXT 36X180 secs 106minues
Total 1 hour 46 minutes
Palette: Manual combine L(Sync)-HOO
Gain: 3300 Offset 100, BIN1
CCD: QHY128 Pro-C
Mount :iOptron CEM70G
Guide: SVbony 60mm F/4 f/240mm , QHY 290C
Controler:NINA,PHD2 Dithering 5pix, 3 frames each
Pre-Processing APP Extract Ha,Oiii,Luminance
Post-Processing PI,PS
Shot By Taro Seki