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Topline
Here’s a closing name for anybody who desires to see two inexperienced comets earlier than they race away from Earth and get too dim to see. On Monday, Oct. 27, 2025, Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) are nonetheless seen in binoculars about 90 minutes after sundown, within the northwest and south, respectively. However, in addition to fading, a 33%-lit waxing crescent moon will very quickly make comet-watching more difficult.
Comet C/2025 A6 (Lemmon) with a glowing inexperienced coma and visual tail navigating throughout thousands and thousands of stars in Solar System.
getty
Key Facts
Comet Lemmon could be discovered west of the Big Dipper, past vivid star Arcturus, whereas Comet SWAN is shifting in the direction of Saturn, and is presently beneath Altair, the brilliant star on the tip of the well-known Summer Triangle. The greatest time to look is 90 minutes after sundown.
Use stargazing apps similar to Sky Guide, Stellarium and SkySafari to search out the comets, or finder charts at In-The-Sky.com.
Comet Lemmon was found on Jan. 3, 2025, by the Mount Lemmon Survey close to Tucson, Arizona, and can attain its closest level to the Sun on Nov. 8. It will return to the interior photo voltaic system in about 1,150 years.
Comet SWAN was discovered on Sept. 11, 2025, because it looped across the solar. Lemmon final visited the interior photo voltaic system in AD 875 and can return round 3175, whereas SWAN takes roughly 20,000 years to finish one orbit.
Where to search out Comet Lemmon after sundown on Oct. 27, 2025.
Stellarium
When And Where To See The Comets
The greatest time to identify Comet Lemmon and Comet SWAN on Monday, Oct. 27, is throughout a 30-minute window beginning about 90 minutes after sunset where you are. Both are seen after sundown however in reverse components of the sky — Lemmon within the northwest, SWAN within the southwest. For New York City, the place sundown is at 5:54 p.m. EDT, the perfect time for night viewing is 7:24-7:54 p.m. EDT.
How to search out Comet Lemmon, 90 minutes after sundown, from Oct. 24-Nov. 9, 2025.
Stellarium
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