2021 December 17 Sun - with AR12904, AR12905, AR12906, AR12907, AR12908, AR12909, AR12910 and AR12911
.
AR12905 is located at (S11E09). 2 sunspots are visible, but are fading away.
AR12906, is located at (N29W03), at least 10 sunspots are visible. The leading sunspot comes with full penumbra.
AR12907 is located at (S21E27), and at least 23 sunspots are visible, both leading and following sunspots have split umbrae.
AR12908 is located at (S21E46). At least 20 sunspots are visible. Both leading and following sunspots have mature penumbrae
AR12909 is located at (S21E58). At least 10 sunspots are visible. Both leading and following sunspots have mature penumbrae.
The new AR located at (N14W12) is designated AR12910. Flares are observed. At least 5 sunspots are visible.
The AR on the NE solar limb, at (N19E70) is designated AR12911. At least 10 sunspots are visible, embedded in bright faculae.
Sunspot count: group=7, sunspot=70, R=140
H-alpha image from Learmonth, taken at 01:22 UTC
White-light image from SDO, taken at 00:22 UTC
2021 December 17 Sun - with AR12904, AR12905, AR12906, AR12907, AR12908, AR12909, AR12910 and AR12911
2021 December 17 Sun - with AR12904, AR12905, AR12906, AR12907, AR12908, AR12909, AR12910 and AR12911
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