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Evolution of AR11828 - 2013 Aug. 26-28

  [複製鏈接]
發表於 2013-8-31 15:30:10 | 顯示全部樓層 |閱讀模式
AR11828 does not change drastically, but there are some noticeble feature changes.
The dark filament that separates the flaring regions becomes thinner but longer over the 3 days.  The relatively strong flares on AUg. 26 subside on Aug 27, but strengthen again on Aug. 28.

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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