This huge filament is today right on the meridian. It has changed a lot since yesterday, and seems to have been shrinking.
It also seems to remain quiescent.
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
發表於 2013-9-28 11:42:35