Five bright comets approaching Earth

Which comets are approaching Earth? The list includes C/2025 A6 (Lemmon), closest on 21 October 2025. C/2025 K1 (Atlas) will pass on 24–25 November. Interstellar visitor 3I/Atlas will arrive on 18–19 December. Comet 24P/Schanmasse will be seen on 4 January 2026. Finally, C/2024 E1 (Wierzchos) will pass on 17 February 2026.

Why is Comet Lemmon attracting attention? Comet Lemmon is predicted to be the brightest. It was discovered on 3 January 2025 in Arizona. The comet orbits the sun roughly every 1,396 years. Its last visit was around the year 629. After 2025, it will return only in 3421.

The comet is currently in Gemini during dawn skies. Observers report it brightened from magnitude 16.5 to 11 recently. Japanese comet expert Seiichi Yoshida predicts further possible brightening. If the trend continues, it may reach magnitude 5 or 4. That brightness would make it visible to the unaided eye.

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