3-day evolution of a filament near NE limb - 2018 May 19

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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3-day evolution of a filament near NE limb - 2018 May 19

文章 PTS » 週六 19 5月, 2018 22:25

3-day evolution of a filament near NE limb - 2018 May 19

Today, the filament has nearly doubled its length, and the SE extension is darker.

As the slow motion is still unavailable, I have to continue with push or pull the telescope to put the image in field. This task becomes very tedious when working on close-up imaging, and I have to use very short exposures (thus high gain) to avoid blur images.

Telescope: AP Starfire EDT 155 mm f/9.
stopped to 80 mm (f/17.5) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: ASI1600MM, 4656X3520 pixels (3.8 micron), binned 2
North is up, east is to the left.
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