Comet C/2025 A6 Lemmon | International Space Station

Comet C/2025 A6 Lemmon | International Space Station

Expedition 73 flight engineer and Japan Aerospace Exploration Agency (JAXA) astronaut Kimiya Yui: "Not only do the comet's brightness and tail change, but in space photography, the color of the background also changes dramatically, which makes shooting it so enjoyable."

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.

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Expedition 73 Crew

Station Commander: Sergey Ryzhikov (Roscosmos)

JAXA Flight Engineer (Japan): Kimiya Yui

Roscosmos (Russia) Flight Engineers: Alexey Zubritskiy, Oleg Platonov

NASA Flight Engineers: Jonny Kim, Zena Cardman, Mike Fincke

An international partnership of space agencies provides and operates the elements of the International Space Station (ISS). The principals are the space agencies of the United States, Russia, Europe, Japan, and Canada.

Image Credit: Japan Aerospace Exploration Agency (JAXA)/Kimiya Yui

Release Dates: Oct. 20-21, 2025

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