Comet Lemmon, seen once in 1,350 years, will appear soon

**Comet Lemmon, Seen Once in 1,350 Years, Will Appear Soon**
*By Mudit Dube | October 3, 2025 | 3:33 PM*

A rare cosmic traveler, Comet C/2025 A6 (Lemmon), is on its way toward Earth this month. With an orbital period of approximately 1,350 years, this spectacular celestial visitor will make a close approach that could make it visible to the naked eye. Scientists anticipate an impressive show before the comet heads back into deep space.

**Celestial Path**
Comet Lemmon was first spotted on January 3 by astronomers at the Mt. Lemmon SkyCenter in Arizona. Originating from the distant Oort Cloud—a vast region of icy bodies at the edge of our solar system—the comet is traveling at nearly 209,300 km/h toward the Sun and Earth. It will pass closest to our planet on October 21, coming within 56 million miles.

**A Unique Emerald Hue**
One of Comet Lemmon’s most distinctive features is its vibrant green coma, the gas and dust cloud surrounding its nucleus. This emerald glow is caused by diatomic carbon, a molecule consisting of two carbon atoms bonded together. When sunlight excites these molecules, they emit a bright green light. Additionally, the comet sports a colorful tail composed of gas, ice, and dust particles pushed away by solar radiation.

**How and When to See Comet Lemmon**
Currently visible with basic stargazing equipment, Comet Lemmon is expected to brighten in the coming weeks and may soon become visible without telescopes. Astronomers suggest looking for it in the constellation Lynx, situated between Jupiter and the Big Dipper. The best viewing times are just before dawn or right after dusk, especially in mid-October when the comet should reach peak brightness.

Don’t miss this rare opportunity to witness a visitor from the farthest reaches of our solar system—a cosmic event not seen in over a millennium!
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