M45 Pleiades by ZWO Seestar 拍七姊妹星團
分類: 器材情報 Equipment, 觀測報告 Observations
2023-12-11
Taken in Hong Kong 香港新界東+新界西拍攝
把早前3.5小時共1277張的M45七姊妹星團全部疊加，因為她在天上的位置是在正東方升起，好處是拍一兩小時也不太受場旋影響，所以3.5小時曝光拍兩晚便可以。不過Seestar最新軟件版本的更新會有時追蹤失靈，雖然可能照有一張有問題，但若僅用Seestar內置的疊加功能出圖仍會廢了整輯拍攝，要把所有單幀下載到電腦抽出有問題的一張，其餘疊加才可以。
Take a total of 1277 images of the Pleiades (M45) star cluster, which were captured earlier, and stack them together. This is because its position in the sky is rising in the due east direction. The advantage is that even with a one or two-hour exposure, the effects of field rotation are minimal. Therefore, with a 3.5-hour exposure, it can be captured over two nights. However, the latest software update of Seestar may sometimes experience tracking failures. Although there may be a problematic frame, if the stacking function built into Seestar is used to generate the output, the entire set of shots will be wasted. To address this, all individual frames need to be downloaded to a computer and the problematic frame should be removed before stacking the rest of the images.
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