Comet Lemmon (C/2025 A6) was found on January 3, 2025, by the Mount Lemmon Survey in Arizona.

It’s getting brighter fast as it gets closer to the Sun, hitting its closest point, or perihelion, on November 8, 2025.

When that happens, it will be around 49.25 million miles (79.25 million km) away from the Sun.

It’s already visible with small telescopes or binoculars, and it might soon be bright enough to spot with the naked eye.

Comet Lemmon is more favorable for viewers in the Northern Hemisphere, spending a lot of October near the Big Dipper.

However, during northern fall evenings, the Big Dipper sits pretty low on the horizon.

The comet will be at its closest to Earth on October 21, 2025. Around that time, it should be easier to spot in the sky.

After that, it will keep getting brighter, likely hitting its peak brightness and maybe even visible to the naked eye – around October 31 or November 1.

If you want to see it in the first half of October, you’ll probably need to look in the early morning hours before sunrise.

During this time, the comet is expected to be quite dim, around magnitude 6, and will only be visible with some optical help.

By mid-October, the comet will be easier to spot, appearing in the evening sky.

On October 16, 2025, Comet Lemmon will be close to Cor Caroli, the brightest star in Canes Venatici, also known as the Hunting Dogs.

At this time, some predictions suggest the comet could be visible to the naked eye and will continue to get brighter.

Comet Lemmon will reach its peak brightness at the end of October and the start of November.

Brightness estimates vary from magnitude 4 to 2.5. Just remember, comets can be pretty unpredictable.

However, there’s a solid chance you could see the comet with just your eyes from a location with minimal light pollution.

This would make it the brightest comet we’ve seen in our skies since Comet C/2024 G3 (ATLAS) back in January 2025.

DISCLAIMER: This article is derived from information available in the public domain.

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