By August 22, AR12403 has developed into a huge group, extending more than 15 degrees in solar longitude.
Flares and filaments are produced non-stop.
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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發表於 2015-8-24 17:47:06