The Pleiades (Messier 45)

Since I added a short focal length, I was able to capture the Pleiades (Subaru) for the first time in a while.
I tried to process the background using MARS data using MultiscaleGradientCollection, a new feature in the latest version of PixInsight, v1.9.
I was worried about the very reddish background, so I looked at the work of Mike & Mark, who I always use as reference, and sure enough, the background was reddish, so I went with it.
Hmm, 60mm aperture resolution...I guess that's about right.
P.S. The EAF autofocus is completely unreliable, so I used the Joyce Star Spike System(JSSS) to optically generate star spikes and focus manually.

短焦点を追加したので久しぶりのプレアデス星団（すばる）。
PixInsightの最新版V1,9の新機能である、MultiscaleGradientCollectionを使ってMARSデータを利用した背景の処理をして見た。
かなり赤っぽい背景に不安が走りいつもリファレンスにしているMike&Markさんの作品を見たら、やっぱり赤っぽい背景だったのでそのままGo。
うーん、口径60mm解像度、、、、、、まーこんなものかな。
P.S EAFのオートフォーカスは全く当てにならないので、Joyce Star Spike System(JSSS)を利用してStar Spikeを光学的に発生させてマニュアルフォーカス。


Place: Astropical@CSky Observatory (Bortle Class 3, Moon Phase 42.7%)
Shot1 Date:24th / Dec / 2024 23:40 (UTC+7)

William Optics  Z61　WIth JSSS 　(61mm F/5.9  f/360mm)
Filter: Optolong UV/IR, Baader SemiAPO
UV/IR: 20X 180Secs Total 60 minutes (Gain2600)
SmiAPO: 60X 60Secs Total 60 minutes (gain 1600)

Total 2 Hours

Palette: Target L-RGB (UV/IR to Lumi,SemiAPO to RGB)
             
Gain: 1600  2600, Offset 60
CCD: QHY294C Pro 11Mega Mode BIN1
Mount :iOptron CEM70G
Guide: OAG Z61 61mm F/5.9, QHY290C.
Controler: NINA Dither, PHD2
Pre-Processing APP Drizzle None  (North-Left)
Post-Processing PI,PS 
Shot By Taro Seki Astropical.uk

Subaru_Lumi_SemoAPO_crop_HDR-Edit01-Finish