By Amr Singh | 2026-04-18
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quivering
On 05/01/2026 04:15 pm by Patricio Leon | Santiago, Chile
AR4431, close to 8 o'clock limb, has grown fast since yesterday and shows a big Earth-sized dark core. The other sunspots stay stable in size as well as in magnetic configuration, solar activity is in low C-class level for the last two days. Poor seeing after clouds finally receded in the afternoon.
Newt 4.5" + solar film, 1/500s ISO100
crop, b/c