By Kathleen Audette | 2025-10-06
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On 10/07/2025 11:01 am by Patricio Leon | Santiago, Chile
Before going behind the limb, AR 4232 presents the so called Wilson effect, that is, the apparent displacement of the umbra towards center sun respect to the penumbra, plus a sense of "depression" easier to perceive by rotating the image leaving the spot at top
Newt 4.5"+ solar film, 1/640s ISO100
crop, B/C
