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2013 October 18 Sun -summary

[複製連結]
發表於 2013-10-18 22:52:43 | 顯示全部樓層 |閱讀模式
The solar disc is suddenly full of active regions, all 13 of them.

In the southern hemisphere, the active groups of AR11861, AR11864, AR11865 and AR11870 are close to the SW limb and are dominating the SW solar disc.  AR11861 is still showing many flares. A long twisting filament runs from the E of AR11870 all the way to south.
AR11872 and AR11874 are small but active in the SE region.
Further to the east and on the limb, an active group seems to be making its way to the front and is producing several eruptions.

In the north, a long strip of AR's comprising AR11868, AR11869, AR11871, on  latitude 20N and near the meridian, and AR11873 and AR11875 on latitude 10N to the east.
These AR's are active and produce some flares and are associated with several large dark filaments.  A large prominence-filament is turning to the front side on the E limb.  

AR11867 is right on the NW limb.  It is still active and some flares are seen,

AR11876 is very close to the equatoe and just north of AR11861.

Many prominences are visible on the solar limb, mostly on south limb.  
The one on the E limb is half-inside and half out of the disc, and a smaller one to its south is eruptive.  
The ones on the SE limb are eruptive, and the eruption is visible on whole-disc images.  The ones on the SW limb are an eruptive jets.

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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