Tuesday evening, 21 October 2025, had some clouds and haze in the western sky. The comet was near its closest approach to the Earth today.

1830 MST: I went outside and saw Comet C/2025 A6 (Lemmon) using 7x50 binoculars. Coma only, no tail.

1837 MST: Comet's tail faintly visible, 7x50 binoculars.

1848 MST: Comet faintly visible, naked eye from my dark sky location.

1857 MST: Tail about 2° long in 7x50 binoculars.

1858 MST: The comet was easier to see, naked eye.

1907 MST: Ended the comet observing session.

I used a tripod mounted D850 DSLR with 70-300mm lens for these photos.

1832 MST: D850 DSLR (f/4.5, 6 seconds, ISO 1600, FL 70mm)


1849 MST: D850 DSLR (f/4.5, 6 seconds, ISO 5000, FL 70mm)


1849 MST: D850 DSLR (f/5.6, 2 seconds, ISO 25600, FL 300mm)

1901 MST: D850 DSLR (f/4.5, 6 seconds, ISO 12800, FL 70mm)

Click or tap on image for larger version

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