Friday evening, 31 October 2025, I went outside to do some photography of Comet C/2025 A6 (Lemmon).

1819 MST: Spotted the comet, 7x50 binoculars. The coma and a short tail were visible. As the twilight sky became darker, although the sky remained bright due to the Moon, the tail became more visible, reaching a length of about 3° in the binoculars. Although there were times when I thought I could could see the comet naked eye, I was never confident of the observation.

I took several photos using a tripod-mounted D850 DSLR with 70-300mm lens. I also took some handheld iPhone 15 Pro Max photos. Several satellites appear in some of the photos.

1840 MST: D850 DSLR (f/5.6, 2 seconds, ISO 25600, FL 300mm)


1849 MST: iPhone 15 Pro Max (Night Mode, 10 seconds, 2X lens)


1858 MST: D850 DSLR (f/5.6, 2 seconds, ISO 25600, FL 300mm)


1906 MST: D850 DSLR (f/5.6, 6 seconds, ISO 6400, FL 70mm)


1919 MST: D850 DSLR (f/4.5, 6 seconds, ISO 12800, FL 70mm)

---

Comments are welcome using Email. Please read the Email Etiquette guidance.

---

Previous report

Cassiopeia Observatory Home Page