The prominence on the N limb looks quiescent but is in fact slowly erupting, as observed in the last 3 days (2013 Aug. 26-28).
The effect of solar rotation also plays some part to the changes.
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 2013-8-29 08:35:27