The Angel Nebula (エンジェル星雲) NGC2170

Narrow Band Version (Ha-OiiiHb-OiiiHb)

Originally, this is a Target that can be stored in RGB or HaRGB, but from our Backyard, this Target, especially Blue, cannot be exposed due to light pollution. I tried last year and was completely defeated.
However, it was a Target that I wanted to keep somehow, so I tried Narrow Band this time.
However, Blue can only catch a few with Oiii at 4nm.
So, when I tried the H-Beta strategy that I've been experimenting with for a few weeks, I was able to catch Blue with a good feeling.
I don't have a filter for H-Beta yet, so I tried to catch Oiii+H-Beta by stacking L-eNhace+B filter that can pick up the wavelength of Oiii+H-Beta with a band width of 36nm.
I couldn't make a pink or magenta angel with a gradation that can be expressed with LRGB, but I feel that the small blue nebulae in the east are also able to pick up some details.
It depends on Target, but recently I've been feeling a strong need for H-Beta.
However, if  put it like this, it looks just like M42+M43.

しかし、なんとか残したいTargetであったので、今回はNarrow Bandで挑戦してみた。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 35.5%)
Shot Date:29th / Nov / 2022 01:23 - 3rd/ Dec/2022  02:39 (UTC +7)
Celestron C11 HyperStar C11 V4 (280mm F/1.9 f/540mm)

filter: Optolong RGB's B,L-eNhance,Baader HS Ultla Narrowbad 3.5nm Ha

Baader Ha:20X180Secs 60minutes
Optolong Blue+L-eNhance 23X180Secs 69minutes
Total 2 hours 9 minutes

Palette: Ha-OiiiHb-OiiiHb
CCD ASI294mm
Gain 120, BIN2
Mount :iOptron CEM70G
Guide: SVBony 60mm F/4, QHY290C
Pre-Processing APP Drizzle None
Post-Processing PI,PS
Shot By Taro Seki