Solar Section        

 
 

March 23, 2018

A Short Summary of Carrington Rotation 2199

Carrington Rotation 2199 covered the time period from 2017-12-30 2231UT – 2018-01-27 0639 UT .
106 Submissions were added to ALPO’s Solar archive at the time of this writing. The submissions can be viewed in ALPO’s Solar Archive for CR2199:

http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2017/CR2199

During this rotation we could observe 4 Active Regions AR2692-AR2695. AR2692, visible for 4 days starting on January 5th, was replaced by AR2693 which was visible for 3 days from January 9th till January 11. AR2694 replaced AR2693 on January 12th for 1 day only. The final active region for the rotation, AR2695, was visible for 5 days and grew to a size of 30 millionths and a Wolf Number of 13 on January 17th. Active Regions were visible on 13 days, and 15 days were spot less, bringing the spotless days since solar Max at the end of the rotation to 152. The highest Wolf Number of 13 and the highest Active Region Area for the day of 30 millionths were recorded on January 17th. At 180 millionths, this rotation showed by far the lowest Total Active Regions Total for a rotation since solar max .

For this rotation we would like to feature three observations submitted by three of our observers, Monty Leventhal, Tony Broxton, and David Teske. Thanks to them, as well as all other contributors for another great rotation. Please take a look at all the drawings/images by clicking on the link above which links to our archive for CR2199.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

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