Solar Wind in Comet Lemmon's Tail
Taken by Petr Horálek on October 18, 2025 @
Hoješín, Seč, Czech Republic
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Details:
That evening, a truly unusual view was possible to capture from Seč Lake, Czech Republic. CME from the Sun hit the Earth, producing a G2 geomagnetic storm, including faint auroras even in mid-latitudes. As the comet C/2025 A6 Lemmon approaches Earth (in 2 days), the same cloud from the sun affected even the complicated ion tail of the comet. I succeeded with deeper imaging to reveal that moment in the tail as well as the aurora itself. It doesn't happen every day to capture the invisible solar wind in two sky phenomena at the same moment. Pano: Canon Ra, Sigma Art 50mm, f 1.4, ISO 4000, 43x8s (pano of single shots from tripod). Around 17:40 UTC on 18 October. Comet's tail registered into the panorama. Comet's Tail: Nikon Z6III, Nikkor 135mm, f1.8, stack of 40x20s, Tracked on Vixen Polarie U.
Photographer's website:
https://www.petrhoralek.com/?p=25820
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