Derby and District Astronomical Society
The Sun in 2025
[Gallery]
| Pete Hill captured this image of the Sun in H alpha on the 12th July 2025. Pete used a Coronado PST on an HEQ5 pro mount, solar tracking, and a DMK41 mono CCD camera. Images of the disk and prominences were taken separately, using 1000 frames each and then processed in Autostakkert2, with the best 500 frames stacked. The images were tweaked using wavelets in Registax 6, and the final processing, merging and colourising of the layers performed in Photoshop CS6. Image Credit: Pete Hill. |
|
|
| The data for the following image of the Sun was captured by Chris Callaway on the 11th July 2025. Chris used a Coronado 90, ZWO ASI462MM camera and ZWO T2 tilt adjuster. The video comprised 6000 frames shot at 148 FPS. The best 169 frames were stacked. Both positive and negative versions of the image are shown. Image Credit: Chris Callaway. |
 |
 |
| On the 4th February 2025 Tony Razzell captured a couple of M class solar flares using his Very Low Frequency Sudden Ionospheric Detection system (described here). One M4.7 class flare occurred at 11:20 am and one M3.2 class flare (or possibly more than one concurrently as the shape is slightly different with a slower build-up) at around 13:10-13:14 pm. The GOES-16 satellite's X-Ray flux data is also shown for comparison. |
 |
|
| Neil Garside captured this image of the Sun on the 2nd February 2025 using a Seestar S50 and Baader solar filter. Neil comments that the Baader filter appears to give much finer details than the stock filter that comes with the Seestar. Image Credit: Neil Garside. |
|
[Top]