Close-up of Comet C/2025 A6 (Lemmon): View from British Columbia, Canada

Close-up of Comet C/2025 A6 (Lemmon): View from British Columbia, Canada

Comet C/2025 A6 (Lemmon) is becoming much more active as it nears our Sun. As comets approach the Sun, they heat up, causing their icy components to sublimate. This leads to the formation of a glowing coma and tails that can stretch for millions of kilometers.

Comet Lemmon is brightening and moving into morning northern skies. Besides Comet SWAN25B and Comet ATLAS, Comet C/2025 A6 (Lemmon) is now the third comet currently visible with binoculars and on long camera exposures. Comet Lemmon was discovered early this year and is still headed into the inner Solar System. The comet will round the Sun on November 8, 2025. It passed nearest to the Earth—about half of the Earth-Sun distance—on October 21.

British Columbia is the westernmost province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, British Columbia borders the province of Alberta to the east; the territories of Yukon and Northwest Territories to the north; the US states of Washington, Idaho and Montana to the south, and Alaska to the northwest.

Image Credit: Debra Ceravolo

Capture Location: Southern British Columbia

Image Details: 16 inch Boller & Chivens telescope f/18, 7400mm focal length with a Canon R6 camera attached. 10 X 30 seconds exposures stacked. 

Debra's Website: https://www.astrobin.com/users/debraceravolo/
Image Date: Oct. 29, 2025

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