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2017 Feb 11 Sun

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發表於 2017-2-11 21:21:36 | 顯示全部樓層 |閱讀模式
AR12634 and AR12635 are the most prominent groups on the solar surface.  Both are crossing the meridian.AR12635 shows a large following spot, with 2 main spots in the lead.
Several prominences appear along the solar limb.  All except the NE prominence are relatively dim.


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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