2017 December 31 Sun - new AR near disc centre (may be assigned AR12694)
A bright flare with dark filament appears just to the east of the disc centre.
3 small sunspots appear in pseudo-white light images (with the filter cooled to ambient temperature). The sunspots also show up in the images from SolarMonitor.org.
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 disc centre (may be assigned AR12694)
2017 December 31 Sun - new AR near disc centre (may be assigned AR12694)
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Re: 2017 December 31 Sun - new AR near disc centre (may be assigned AR12694)
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Re: 2017 December 31 Sun - new AR near disc centre (may be assigned AR12694)
more images
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