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2014 Nov 25 - AR12209 is very close to the W limb

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發表於 2014-11-30 20:40:13 | 顯示全部樓層 |閱讀模式
As AR12192 is now moving towards the W limb.  While its size is diminishing, partly due to foreshortening, it is still active with occasinal flares.
The "white light" images are actually taken with the H-alpha filters, but cooled to ambient temperature instead of the normal working temperature at 59C

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.
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