2022 April 20 Sun - with AR12988, AR12989, AR12990, AR12991, AR12993, AR12994, AR12995 and possible AR1299a and AR1299b.

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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2022 April 20 Sun - with AR12988, AR12989, AR12990, AR12991, AR12993, AR12994, AR12995 and possible AR1299a and AR1299b.

文章 PTS » 週三 20 4月, 2022 10:24

2022 April 20 Sun - with AR12988, AR12989, AR12990, AR12991, AR12993, AR12994, AR12995 and possible AR1299a and AR1299b.

AR12988 is located at (N14W58). No sunspot is visible, leaving just some plages.
AR12989 is located at (N18W21). No sunspot is visible, leaving just patches of plages. Flares are observed.
AR12990 is located at (N16W45). 3 sunspots are observed.
AR12991 is located at (S24W02). 1 sunspots with penumbra is observed.
AR12993 is located at (N18E37). At least 10 sunspots are observed, all embedded in faculae. The leading sunspot has split umbra.
AR12994 is located at (N13E39). At least 10 sunspots are observed. The leading and following sunspots come with penumbra and split umbra.
AR12995 is located at (N13E69). 1 large sunspot with penumbra is observed.
Meanwhile, 2 possible new AR's are visible.
Possible AR1299a is located at (N24E84). 1 sunspot with penumbra is observed.
Possible AR1299b is located at (S16E27). 2 small sunspots are observed.

Sunspot count: group=7, sunspot=28, R=98

H-alpha image from Learmonth, taken at 00:52 UTC
White-light image from SDO, taken at 00:07 UTC
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