Friday, March 27, 2026

Lecture Code Rood by Toon Verlinden

Together with colleague Walter and Philip, I attended a lecture by Toon Verlinden of his book "Code Rood" or Code Red.

In the book Code Red, Toon Verlinden analyzes the vulnerability of our modern civilization by linking four catastrophic scenarios to their historical predecessors. He uses the 1815 eruption of Mount Tambora as a chilling example of a supervolcano; it caused a year without a summer and global famine at the time, reminding us of the fragility of our current food chain. Regarding the danger of asteroids, he points to the 1908 Tunguska explosion, where a relatively small fragment wiped out thousands of square kilometers of forest, to demonstrate why we are now developing missions like DART to prevent impacts with precision missiles.

Verlinden also warns of a repeat of the 1859 Carrington Event, a solar storm that merely caused telegraph lines to spark back then, but today would completely cripple our power grid and the internet. Finally, he draws lessons from the devastating 1918 Spanish Flu to emphasize the necessity of rapid vaccine development and global surveillance against new pandemics. By analyzing these destructive moments from the past, Verlinden shows that our modern technology is not only a source of vulnerability but also offers our only real chance to survive a subsequent global disaster.

I bough his book back in 2024 and beside signing my book, a selfie with author was made.




Thursday, March 26, 2026

Near occultation of SAO77121 by the Moon on March 24, 2026

Last Monday (March 24), I was located just north of the graze line for the lunar occultation of star SAO77121. My colleague Bart from Helios had alerted us, allowing me to track the event. As Bart predicted, I was in the area where the star was not occulted. My colleague Lieven also observed the event; he was positioned just south of the graze line and saw the star narrowly escape occultation as well.






Timing UT21h34
Setting: Star Adventurer GTI with Nikon D7500 and 200mm lens
Conditions: Transparency good and Seeing moderate. 





Sunspot AR4392 March 22

 


Inverted image of H-alpha spectrum of the Sun from last Sunday March 22, 2026. Crop from AR4392.
Picture made using SolEx with ASI678MM on TLAPO80/480.

Tuesday, March 24, 2026

Halo 360°

Capturing a very bright 360° Halo around the Sun.





Sunday, March 22, 2026

Coronal Hole and Sol'Ex images March 22

My Sol'Ex was used to capture the HeD3 line and after editing is was possible to bring forward the current coronal hole of the Sun. A comparison was made with SDO/AIA 211A and GOES19 195A. All in all it's not most beautiful picture but still I could capture the coronal hole. For sure I will try this again when a more deligned coronal hole shows up.






The day started with some bad seeing but during noon time seeing became better. I made time to adjust the Sol'Ex and was able to get sharp images in all captured wavelenghts.
Tilt was corrected with some very good results: 0,1° deviation... not bad at all. The most suffer from dust on the slit. Yesterday I did some cleaning, but not enough it seems. 











Saturday, March 21, 2026

Sun March 21

The Sun this afternoon, observed with Sol'Ex in H-alpha and CaIIH.






CaIIH1v


Sun in CaIIH

My last So'Ex observation was on January 4th this year. So today it was some trial and error...
Sun today in CaIIH 

Sol'Ex by James R with TS TLAPO80/480 and ASI678MM
SharpCap, Inti, CS4, DeNoise AI