2017 March 27 Sun

[PTS]

A very active group, AR12644, appears on the east side, with strong flares and filaments.
Near the west side, a small region seems to become active with bright flare and filament.
AR12643 is crossing the meridian but has subsided a bit showing only plages.


Observation has to stop after just 30 minutes as clouds come from the south.


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.

[Eddy So]