December 31, 2019 on 12:54 pm | In Sun | Comments Off

The last day of the year and the sky is clear!  Seeing however is not as good, caused by wind sheer with the 110 miles/hour winds in the jet stream.  Since we have another spotless day, I imaged today the remaining plage of what used to be AR2753, which is slowly approaching the western limb.  This is spotless day 646 since Solar maximum.

2019-12-31-1558_3-TR-540nm.jpg 2019-12-31-1605_1-TR-Ha.jpg 2019-12-31-1601_5-TR-CaK.jpg

2019-12-31-1607_8-TR-Ha-plage.jpg

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