The Swelling Spiral Galaxy (出世段階の渦巻銀河)Messier 61

First shot in March at Backyard.
When I thought about Swelling as an interesting name, it seems that the spiral galaxy's growth process is divided into several classes, and it has this name because it is between the classes.
This is like a galaxy after it has crossed the peak of growth.
Taken at the chance that the clouds cleared for an hour and a half for the first time in two weeks.

3月初めてのBackyardからの撮影。
Swellingなんて面白い名前だと思い調べてみたら、渦巻銀河の成長工程がいくつかのクラスに分割されていて、そのクラスとクラスの間にあるためこの名前を持っているようだ。
これは成長の頂点を超えた後の銀河のようだ。
2週間ぶりに1時間半だけ雲が晴れたチャンスに撮影。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 8.9%)
Date:16th / Feb / 2021 1:22(UTC+7) Start
TS TSRC10T Carbon Truss Prime Focus (250mm F/8 f/2000mm)
L-Pro 17 SubsX300sec Total 1 hour 25minutes 
OSC:RGB
Gain:120
CCD: ZWO ASI294MC Pro
Filter: Optolong L-Pro
Mount :iOptron CEM70G
Guide: SVBony 30mm F/4, ZWO ASI120MC-S
Controler: ASIAIR-Pro Dither
Pre-Processing APP
Post-Processing PI,PS
Shot By Taro Seki Astropical.uk

M61-LPro-mod-BGE-PI_Edit01-Finish