AR12418 has appeared as a large single spot with well-defined umbra-penumbra. Flares and filaments are appearing to the east of the spot.
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 2015-9-18 11:25:21