Comet Tracker: How To Find Comets Lemmon And SWAN On Saturday
Two comets are on the cusp of naked-eye visibility and can be spotted in the night sky this weekend. Comet Lemmon (C2025 A6) and Comet SWAN (C2025 R2) are predicted to reach their brightest point on October 20-21, coinciding with the peak of the Orionid meteor shower.
Critical Details
Date: Saturday, October 18, 2025
Time: About 90 minutes after sunset in the northwest and southwest night sky
Location: Visible from a dark-sky site
According to the Comet Observation Database, Comet Lemmon is shining at magnitude 4.9, while Comet SWAN is at magnitude 5.9. Although they are almost bright enough for naked-eye observation, binoculars will be necessary to spot them.
Timeline and Impact
The comets' visibility coincides with the Orionid meteor shower, which peaks on October 20-21. Skywatchers can expect a spectacular display of meteors and potentially two visible comets. The International Astronomical Union (IAU) has confirmed the comets' orbits and predicted brightness.
Background Context
These are the first two comets visible to amateur skywatchers since Comet Tsuchinshan-ATLAS in October 2024. The IAU has been tracking the comets' movements, providing essential data for astronomers and stargazers worldwide.
What Happens Next
As the Orionid meteor shower reaches its peak, observers can expect a thrilling display of celestial activity. Binoculars will be necessary to spot Comets Lemmon and SWAN, but with clear skies and a dark location, these comets could become the highlight of the weekend's stargazing events.
Sources
Comet Observation Database
International Astronomical Union (IAU)
*This story is developing. Information compiled from Forbes reporting.*
