Project Calabash Nebula #1  (ひょうたん星雲) OH 231.84 +4.22

Last time it was faint, but Calabash Nebula was photographed for the first time in three years.
But it looks like a cucumber or an eggplant, not a gourd.
I want to capture the swollen part on the south side somehow. However, the light there is quite faint, and the element of the light source is unknown, so various investigations will be necessary.
Therefore, I decided to start Project Calabash to leave the process from the investigation stage.
Last time, it was captured with the L-Pro filter. First, I shot with the BroadBand filter and started by seeing what and how far I could see. By chance, I made a mistake in selecting the filter in EFW and shot with No Filter (CMOS protective glass AR only).
I also tried IR685, but NoFilter was brighter.
The long part in the north is getting brighter, but what about the swollen part in the south? ? ? ? situation.
Looking at the Hubble photo, the lower bulge is blue, so let's do a Survey Shot to find it.

前回微かではあるが、三年目にして初めて写ったCalabash Nebula。
でもその姿はひょうたんでは無くきゅうりか茄子のようだ。
何とか南側の膨れた部分まで写したい。でもそこはかなり微光なのと、光源の元素も不明なので色々調査が必要であろう。
よって、調査段階からの過程を残すをProject Calabashを始めることにした。
前回はL-Proのフィルターに写っていたのまずはBroadBandのフィルターで撮影して何がどこまで見えるかからスタート。偶然EFWでのフィルターの選択をまちがってNo Filter(CMOSのプロテクトグラスのARのみ)で撮影した物が一番明るく写っていたので、最初はNoFilterで120FarmeX60秒でSurvey Shot.
IR685も試したがNoFilterの方が明るく写っていた。
北の長い部分は明るくなってきたが、やはり南の膨れた部分は????状態。
Hubbleの写真を見ると下膨れの部分は青い色なので、それを探すSurvey Shotをしてみよう。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 10.3%)
Shot Date 17th / Feb / 2023 0:21 (UTC+7)
Celestron C11  (280mm,F/10.0,f/2800mm)
filter: NO FILTER
No Filter :90X60 Secs 90minutes
Total 1 hour 30 minutes

Palette: Target :RGB
Gain: 360 BIN1
CCD:PlayerOne Uranus-C IMX585
Mount :iOptron CEM70G
Guide: SVBony 60mm F/4, QHY290C (Dithering every 5 shots)
Controler:NINA,PHD2
Pre-Processing APP Drizzle None
Post-Processing PI,PS
Shot By Taro Seki Astropical.uk

Calabash-crop-BGE-Edit01-finish