The Dutch Observatory

Clear skies today but many wide con-trails made the session much more challenging.  AR2782 has decayed in WL and I could not see it.  However in Ha and CaK the plages both AR2781 and 82 were nicely visible.  I am still imaging on my old laptop.  The replacement battery for my main laptop is supposed to arrive next Tuesday.  So until them it will be a handicap.

Finally some clear skies again, but the seeing was poor.  This was my first chance to image AR2782.  AR2781 is still stable but has decayed to an Hsx spot before it soon will turn to the far-side of the Sun.  My main laptop broke down and I am now using an old backup, but I lost my settings for now.  So the images today are using new settings.  Full disk images today as well as close ups of AR2781 and AR2782.

Because of Storm Eta, I did not expect to image today.  However, a few gaps showed between clouds enough for some 540nm images today, however it was hard to focus and adjust the exposure.  I waited in vain for some more, but did not get enough time, so finally gave up…..  AR2780 has decayed again to a plage. AR2781 decays also some, and shows less activity.  Today 540nm images of the whole disk as well as a close up of AR2780.

Clear skies after an early cloud cover this morning.  AR2781 has developed into a nice Active Region, currently showing 7 spots and covering 450 millionths.  AR2780 has developed the one spot which is now registered, but today I notice a few small pores below it in the 540nm image. Today full disk images as well as close ups of the mentioned regions.

Clear skies again today with good seeing.  The plage AR2780 has started to develop some pores again, so we will be following if they evolve further and become stable enough to be registered as spots.  AR2781 is so far the largest named area in the new Cycle 25 and registers 8 spots.  In addition some proms at the NE and NW limbs today.  The Sun seems to come out of the Very Low Activity and moving into the Low Activity category.

Clear Skies this morning with good seeing conditions.  AR2781 showed up covering an area of 150 millionths.  AR2780 has sizzled away but the plage is still visible in Ha and CaK.  AR2781 shows some interesting activity shown in the CaK image.  In addition, the region produced a few C-class flares.  Today’s images show the full disk in the three wavelengths as well as closeups of AR2781, and the remaining plage of AR2780 in Cak and Ha.

Clear skies with relative good seeing conditions.  AR2780, which formed yesterday, is decaying already and I did not see any spots during my session in WL.  A new area has shown up at the South Eastern limb and was named this morning as AR2781.  It is nicely visible in all three wavelengths and shows three spots.   Also its size seems to be larger than any of the recent areas as they started their way to the Western limb.  We are now also seeing a few C-Class flares, rather than the B-class flares.  Looking forward to what tomorrow will bring.

Clear skies today. Seeing is still not good, but has improved a little.   AR2778 has disappeared around the Western limb, but a new region has emerged at the NE limb.  AR2780 is showing a few small spots.  We’ll need to see what will evolve here.  Full disk images today in the three wavelengths as well as close ups of the new region.

Short Summary of Carrington Rotation CR2236

Carrington Rotation CR2236 covered the time period from 2020-10-05 0018 UT until 2020-11-01 0720 UT.
The observations can be viewed in my Solar Archive for CR2236 which can be accessed at: http://ceastronomy.org/gallery/main.php?g2_itemId=51354
The rotation brought us 5 spotless days,  We could observe 6 Active Regions, all of which were Cycle 25 polarized.   The smallest one, AR2777, was very unstable and did not make it over 10 millionths during its one day of being active. AR 2776 lasted the longest with 12 days, as it rotated from the Eastern limb and disappeared around the Western limb.  Total Active Region Area for AR2776 was 420 millionths with the maximum daily area of 110 millionth on October 19th. AR2778 however, which developed much faster, accounted for 830 millionths for its short appearance in CR2236 of the Total Active Region Area for the Rotation of 2000 millionths. Overall Solar Activity is ticking up a little, while the rotation increased the spotless days count since solar maximum to 856 spotless days. Finally, during the period SWPC reported 2 A-class, 82 B-class flares,  and 14 C-class flares.

This time I would like to feature some Ha images showing AR2776 on three consecutive days from October 17 through 19, during a time that some of the flares showed as “Ellermans bombs”.
Clear Skies,
Theo Ramakers