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2013 September 19 Sun -summary

[複製連結]
發表於 2013-9-20 10:45:53 | 顯示全部樓層 |閱讀模式
本帖最後由 PTS 於 2013-9-21 00:11 編輯

With the appearance of ARAR11845, AR11846 and AR11847, the solar disc is much more active than 2 days ago.  The sudden appearance of AR11843 near the centre of the solar disc is unexpected.
The main show of the day is the huge and eruptive prominence on the E limb.  Its eruptive is even visible in the whole-disc images.  Most of my observation session is focused on this prominence, with nearly 60% of the total number of images taken.

Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
North is up, and east to the left

PTS
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