2021 January 19 Sun - solar surface in white-light, with AR12796 and AR12797

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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2021 January 19 Sun - solar surface in white-light, with AR12796 and AR12797

文章 PTS » 週二 19 1月, 2021 12:12

2021 January 19 Sun - solar surface in white-light, with AR12796 and AR12797

After studying the satellite cloud images, I started early so as to complete my observation before the clouds from south arrive.
Seeing is terrible at the start of observation, but improves a bit after 02:30 UTC.

AR12796 is located at (S21W46) today. All sunspots are gone.
Meanwhile, AR12797 is now located at (S18E62). This Class-C group consists of 2 large leading sunspots with mature penumbrae, followed by 2 tiny sunspots. It seems the leading sunspots result from splitting of a huge sunspot before AR12797 turns to the front side.
sunspot count: group=1, sunspot=4, R=14

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+ Baader Planetarium G-band continuum.
approximately north is up, east to the left
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Eddy So
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Re: 2021 January 19 Sun - solar surface in white-light, with AR12796 and AR12797

文章 Eddy So » 週二 19 1月, 2021 20:08

[Good Job]

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