2021 October 17 Sun - solar surface in white-light, 1st day with no numbered active region.

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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2021 October 17 Sun - solar surface in white-light, 1st day with no numbered active region.

文章 PTS » 週日 17 10月, 2021 14:26

2021 October 17 Sun - solar surface in white-light, with no active region.

With AR12882 turned to the backside, there is no numbered active region on the solar disc.
Sunspot count: group=0, sunspot=0, R=0

Telescope: Celestron C5, 127mm f/10 Schmidt-Cassegrain
Camera : ASI1600MM Pro, not cooled
focal length : 1250 mm f/10
Filters: Baader Solar Film 5.0
approximately north is up, east to the left
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