Solar Section        

 
 

November 30, 2017

A Short Summary of Carrington Rotation 2196

Carrington Rotation 2196 covered the time period from 2017-10-10 0008 UT – 2017-11-06 0713 UT.
261 Submissions were added to ALPO’s Solar archive at the time of this summary despite the very low solar activity. The submissions can be viewed in ALPO’s Solar Archive for CR2196:

http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2017/CR2196

During the rotation, we could observe 3 Active Regions AR2684-AR2686 of which AR2684 was only visible for one day. The highest Wolf Number of 23 was recorded on five days, 10/24 and 10/25, 10/27 and 10/28 and 10/30 while the highest total Active Region Area for the day of 90 millionths was recorded on 10/24 and 10/25th. The largest region for the rotation was AR2685 covering an area of 70 millionths on 10/23. This was so far the least active region since Solar Maximum with the Total Active Region Areas for the rotation of 540 millionths and 16 spotless days. The last full day of the rotation was spotless, for spotless day 107.

For this Rotation we would like to feature three observation drawings by three of our observers, Tony Broxton, Monty Leventhal, and Joe Gianninoto. Thanks to them, as well as all other contributors for another great rotation. Please take a look at all drawings/images by clicking on the link above linking to our archive for CR2196.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

 
 

November 23, 2018

ALPOSS – A report on Carrington Rotation CR2188 through CR2190

ALPOSS Coordinator and Scientific Advisor Richard Hill continues his papers covering the analysis of the activity of the Sun’s Carrington Rotations with a report on: CR2188 thru CR2190. This covers the period from March 6th, 2017 until May 26th, 2017. The reports are based on over 1200 reports and image submissions of numerous contributors to the Solar Observations Archive. The report was published in the 2017 Autumn issue of the ALPO Journal, the Strolling Astronomer, and can now also be accessed as a stand alone document on ALPOSS Solar Observations & Reports page, or downloading it by “right” clicking on the picture below.

 
 

November 5, 2017

A Short Summary of Carrington Rotation 2195

Carrington Rotation 2195 covered the time period from 2017-09-12 1729 UT – 2017-10-10 0008 UT.
510 Submissions were added to ALPO’s Solar archive at the time of this summary. Stimulated by the previous very active rotation, more images were submitted for this rotation than the previous one. They can be viewed in ALPO’s Solar Archive for CR2195:

http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2017/CR2195

During the rotation, we could observe 5 Active Regions AR2680-AR2683 and AR2674, which was visible only for one last day before it did rotate to the far side. The highest Wolf Number of 40 was recorded on two days, 9/27 and 9/29, while the highest total Active Region Area for the day of 560 millionths was recorded on 9/26. The largest region for the rotation was AR2683 covering an area of 330 millionths on 10/4. The last full day of the rotation was spotless again for spotless day 92.

For this Rotation we would like to feature three observations/images by three of our observers, Guilherme Grassman , David Teske, and Theo Ramakers Thanks to them, as well as all other contributors for another great rotation. Please take a look at their images by clicking on the link above linking to our archive for CR2195.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

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