This huge but relatively quiescent prominence actually shows gradual changes.
Here are images of the prominence over 4 days (from Feb 10 - 13).
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 2015-2-13 22:55:18