2017 December 31 Sun - new AR near E limb (may be assigned AR12693)
This AR has become more active today, with a bright flare and many filaments. However, the sunspots observed yesterday have vanished.
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 31 Sun - new AR near E limb (may be assigned AR12693)
2017 December 31 Sun - new AR near E limb (may be assigned AR12693)
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Re: 2017 December 31 Sun - new AR near E limb (may be assigned AR12693)
more images
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- AR12693-20171231101713153.jpg (150.79 KiB) 已瀏覽 425 次
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- AR12693-20171231101934024.jpg (151.96 KiB) 已瀏覽 425 次
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- AR12693-20171231103210627.jpg (153.48 KiB) 已瀏覽 425 次
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