2019 December 23 Sun at 23:00 UTC - new active region on SE limb, and from 25th solar cycle, will be AR12753

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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2019 December 23 Sun at 23:00 UTC - new active region on SE limb, and from 25th solar cycle, will be AR12753

文章 PTS » 週二 24 12月, 2019 07:53

2019 December 23 Sun at 23:00 UTC - new active region on SE limb, and from 25th solar cycle, will be AR12753

A new active region shows up at high latitude (30 south). This AR is quite extensive and comes with a bipolar sunspots group. There are more than 3 sunspots.
From the magnetogram, magnetic reversal is observed. Thus this belongs to the new 25th solar cycle.
Watch out!
Sunspot count: group=1, sunspot number=3, R=14

H-alpha image from Cerro Tololo taken at 23:00 UTC, magnetogram and white-light images from SDO taken at 22:40:38 UTC
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