Overview
- The comet made its closest pass around Oct. 21, with the best evening views forecast for Oct. 25–31 low in the northwest shortly after sunset near Arcturus in Boötes.
- Observers report naked‑eye visibility from dark‑sky sites across the Northern Hemisphere, with binoculars or small telescopes recommended in cities and southern views improving in November.
- Images from amateurs and agencies show a green coma and distinct ion and dust tails, confirming the comet’s striking appearance.
- Lemmon is a long‑period object that will not return for more than a thousand years, making this appearance a rare viewing opportunity.
- A second visitor, comet SWAN (C/2025 R2), is also visible this month, creating an uncommon double‑comet sight for skywatchers.