Solar Section        

 
 

March 23, 2018

A Short Summary of Carrington Rotation 2200

Carrington Rotation 2200 covered the time period from 2018-01-27 0639 UT – 2018-02-23 1448 UT .
120 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 CR2200:

http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2018/CR2200

This rotation allowed us to see again a nice sized active region track along the visible hemisphere of the Sun from February 5th till February 17th. Active Region AR2699 increased in coverage from 80 millionths when it came around the eastern limb to 240 millionths on February 11, when 25 sunspots were recorded. Despite this, the region only produced one C-class flare, a C4.6 on February 10th. In addition, we were able to see two very small regions, AR2697 and AR2698, which each disappeared within a day. The highest Wolf Number of 35 and the highest Active Region Area for the day of 240 millionths were recorded on February 11. This was a nice rotation for a change, with a Total Rotation Active Region Area of 2160 millionths. But it ended with spotless day 163.

For this rotation we would like to feature three observations submitted by three of our observers, Dave Tyler, Howard Eskildsen, and a composite by Rik Hill. 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 CR2200.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

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