2017 December 30 Sun - new AR (may be assigned AR12693)
A tiny flare/plage appeared on the E limb on Dec. 29, 2017 but it was only noted on the images.
Today, this AR becomes more active, with many filaments.
2 tiny sunspots appear when the filter is allowed to cool to ambient temperature. The appearance of the sunspots may be brief, thus no official numbering is given.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm (f/28) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
2017 December 30 Sun - new AR (may be assigned AR12693)
2017 December 30 Sun - new AR (may be assigned AR12693)
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- 20171230144517499.jpg (180.89 KiB) 已瀏覽 319 次
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Re: 2017 December 30 Sun - new AR (may be assigned AR12693)
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- 20171230144517499.jpg (180.89 KiB) 已瀏覽 318 次
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- AR12693-20171230154242132.jpg (232.71 KiB) 已瀏覽 318 次
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- AR12693-20171230154353863.jpg (190.02 KiB) 已瀏覽 318 次
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- AR12693-20171230154450137.jpg (205.45 KiB) 已瀏覽 318 次
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- AR12693-20171230155537272_cr.jpg (12.51 KiB) 已瀏覽 318 次
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