Solar Section        


November 7, 2018

A Short Summary of Carrington Rotation 2209

Carrington Rotation 2209 covered the time period from 2018-09-29 1355 UT- 2018-10-26 2051 UT.
Image submissions decreased to 196 Images/Observations. The submissions can be viewed in ALPO’s Solar Archive for CR2209:

We had an opportunity to observe three active regions with a total of 6 spots. The highest Daily Active Region Area for the rotation was 30 millionths on October 1, 2 and 3. The highest Wolf number for the rotation was 22 on October 14 and 15, which was made up of two small areas AR2724 and AR2725 which measured 10 millionths only each. The rotation ended accounting for 16 spotless days and a Total Rotation Active Region Area of 180 millionths. During the rotation, the sun produced a total of 1 A-class flare, and 4 B-class flares, three of which happened in AR2724 and the highest measuring an B7.1 on October 12. At this time in the solar cycle with the lack of spots, observers focus more on filaments, prominences, faculae and plages. Overall Solar Activity remained Very Low and the rotation ended with Spotless Day 315.
This time we would like to feature some drawings submitted by two of our observers, Joe Gianninoto and David Teske, and image of a NE prominence by Howard Eskildsen. Please click the thumbnails below to see the full images. Thanks all contributors for another great rotation. Please take a look at all the drawings/images by clicking on the link above which will bring you to our archive for CR2209.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

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