By Alessandro Passeggia | 2026-07-29
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Solar Activity
On 07/30/2026 10:11 am by Jim Militello | Tucson, Arizona USA
Hydrogen-alpha image of the Sun showing active region 4498 with a huge sunspot. Also some filaments, and prominence.
Coronado SolarMax 90 Ha solar telescope, ZWO ASI183mm video camera.
The image is a stack of 30 video frames processed with Autostakkert, Registax, Photoshop.
