2021 December 11 Sun - solar surface in white-light, with AR12904

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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2021 December 11 Sun - solar surface in white-light, with AR12904

文章 PTS » 週六 11 12月, 2021 13:32

2021 December 11 Sun - solar surface in white-light, with AR12904

3nd day with no sunspot.
AR12901 and AR12903 have all turned to the backside.
AR12904 is located at (S26W25). No sunspot is visible, leaving just patches of faculae.

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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