聖誕樹星雲，以及觀星自拍幾張

9/20-21

今晚一入夜鞍部的夜空便是晴朗的。

九月中台北的天氣相當好，這個星期又逢月相有利於觀測的時候，目前已上來了三晚（上下半夜共6個觀測時段），像是吃到飽吃到不要不要的累（笑）。

今晚傑洛米也來鞍部，還帶肉包請我吃，大感謝。

我今晚的目標仍是先繼續累積sh2-129的曝光，約曝3.5小時。目前三個晚上共累積將近十小時的曝光（朝目標累積曝光24小時前進中 XD）。

下半夜也拍了玫瑰星雲旁的聖誕樹星雲 (NGC2264) 5min x10 共曝光50分鐘。

The weather in Taipei in mid-September is quite good, and this week is a good time for observation because the moon is not too bright. I have been coming to Anbu for three nights (six observation sessions in total), and I had a blast.

Jeremy also came to Anbu tonight, and he brought me some meat buns to eat. Thank you very much.

Tonight, I am still working on accumulating exposure of Sh2-129, which will take about 3.5 hours. I have accumulated nearly ten hours of exposure in the past three nights, and I am on track to reach my goal of 24 hours of exposure.

In the second half of the night, I also photographed the Christmas Tree Nebula (NGC2264) next to the Rose Nebula, for a total exposure of 50 minutes.

NGC2264

Pentax 75SDHF+SMC 0.72x

Takahashi EM-2* +MGENII auto guiding 

Pentax k5(full spectrum mod.) 

IDAS NB1 filter

5min x10

低空有些雲，還好並沒有明顯的影響，一直到凌晨約三點才漫了過來，淹沒整個大台北。

就在約凌晨左右雲層即將要覆蓋至鞍部之前，夜空達到今晚的最暗，為AEII 20.26 (約是SQM的20.36)

今晚調整 MGEN的 aggr.參數至85%（80-＞85），約減少了一半的導星修正頻率／次數，效果不錯。

下次我想嘗試設在85至90%之間試試看頻率會不會再降低。

Mode2

told. 0.10

aggr. 85%

I adjusted the MGEN aggr. parameter to 85% tonight, which reduced the guiding correction frequency by about half. The effect is good.

ＸＸＸ


目前累積9小時的Sh2-129

開始看到一點OU4的影子