Sirius And Canopus
Last night, I saw a sentence in a Japanese astronomy article that said, "It's time to observe Canopus in Japan too," so I tried capturing Sirius, the brightest star, and Canopus, the second brightest, in a single frame.
I had intended to capture it in one shot, but the luminance noise and cold noise were unbearable, so I took a dark and bias shot and also integrated two light frames.
Apologies for the crappy photo.
I had intended to capture it in one shot, but the luminance noise and cold noise were unbearable, so I took a dark and bias shot and also integrated two light frames.
Apologies for the crappy photo.
Sirius: Alpha star of Canis Major, magnitude -1.46
Canopus: Alpha star of Carina, magnitude -0.74
昨晩、日本の天体記事で「日本でもカーノープスの観測時期になった」という文章を見たので
見かけ上一番明る星のシリウスと2番目に明る星のカノープスを1フレームに収めてみた。
ワンショットの撮って出しと考えていたが、輝度ノイズとコールドノイズが我慢できるレベルではなかったのでDarkとBiasを撮影して、ついでにライトフレームも2枚インテグレーションをかけた。
なんとも下手くそな写真で申し訳ないです〜。
Sirius:おおいぬ座のα星、等級 -1.46
Canopus:りゅうこつ座のα星、等級 -0.74
Place: Back Street East Pattaya Chonburi Thailand (Bortle Class 7, Moon Phase 99.0%)
Shot Date:3rd / Fev / 2026 23:22 (UTC+7)
Samyang MF 24mm F/1.4 Fstop 2.0
Fuji X-A7 ISO 1600
Filter: CPL
Exp:2X0.625Secs Total 1.25 Secs Raw files
Total 1.25 Secs
Palette:: RGB
Mount :Camera Tripod
Pre-Processing: APP
Post-Processing:PI,Affinity
Shot By Taro Seki Astropical.uk

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