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Catch Comet Lemmon and SWAN in October Skies!

10/30/2025

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Summary

Story summary

Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) will be visible from the Northern Hemisphere 90 minutes after sunset, with Lemmon in the northwest and SWAN in the southwest.
In New York City, viewing is 7:22–7:52 p.m. EDT on October 29.
Comet Lemmon was discovered January 3, 2025, and Comet SWAN was found September 11, 2025, with Lemmon's perihelion on November 8 and SWAN's visibility decreasing as moonlight rises.

History

Historical Context

Comet Hale-Bopp, discovered independently by Alan Hale and Thomas Bopp on July 23, 1995, became one of the brightest comets of the 20th century. It reached peak brightness on April 1, 1997, captivating 69% of Americans. Its extensive visibility for 18 months and the rise of the Internet fueled public interest in astronomy, influencing ongoing scientific exploration of comets.

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Story summary

Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) will be visible from the Northern Hemisphere 90 minutes after sunset, with Lemmon in the northwest and SWAN in the southwest.
In New York City, viewing is 7:22–7:52 p.m. EDT on October 29.
Comet Lemmon was discovered January 3, 2025, and Comet SWAN was found September 11, 2025, with Lemmon's perihelion on November 8 and SWAN's visibility decreasing as moonlight rises.

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