Filaments and an Active Region: April 2026
“A monochrome H-alpha mosaic with a winding filament, a sunspot and bright plage.”
A winding dark filament runs through the field, with a sunspot and a region of bright plage below it.
Captured as video panels, each stacked in AutoStakkert!3, sharpened in ImPPG and stitched into a mosaic.
Total Exposure
Mosaic of video captures
Integration
| Filter | Subs |
|---|---|
| H-alpha | multiple videos (stitched mosaic) |
Locations
San Giuliano Milanese, Lombardy, Italy
Bortle Class 7 • 2026-04-03