How to see Comet Lemmon over Arizona

Skywatchers of Arizona should clear their schedules. The next few weeks will feature the appearance of supermoons and meteor showers. Plus, there will also be a pair of comets visible in the night sky. Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) can both be seen after sunset.

The former is the brighter of the two comets and also has a local connection.

Comet Lemmon was first spotted in January by astronomers on Mount Lemmon near Tucson, hence its name. It’s also bright enough to spot without binoculars or a telescope and is visible from now until mid-November.

When is Comet Lemmon visible? Where should you look to see the comet tonight? Here’s how to see Comet Lemmon in Arizona.

Is there a comet in the sky tonight?

Yes, two comets appear in the sky tonight. Comet Lemmon (C/2025 A6) and Comet Swan (C/2025 R2) are both visible in the evening sky.

What time will the comet be visible tonight?

Comet Lemmon becomes visible in the northwestern sky about 45 minutes after sunset each night and can be seen until early to mid-November.

Where to look for Comet Lemmon?

Comet Lemmon can be seen in the northwestern sky near the bright star Arcturus. Skywatchers should use the Big Dipper to locate the comet, which appears just below the handle of the constellation.

Is Comet Lemmon visible to the naked eye?

Yes. Comet Lemmon visibility is bright enough to see with the naked eye, though a telescope or binoculars offer a more detailed view.

What apps can find Comet Lemmon?

Skywatchers can track Comet Lemmon using free apps like Bright Comets for iOS or Comet Book for Android.

Where is Comet Lemmon right now?

Comet Lemmon passed closest to Earth on Oct. 21 and will reach perihelion, or its closest approach to the Sun, on Nov. 8.

Why is it called Comet Lemmon?

Comet Lemmon (C/2025 A6) was first spotted in January by the Mount Lemmon Survey at Steward Observatory in Southern Arizona.

Will Comet Lemmon hit Earth?

Nope. Astronomers have studied Comet Lemmon and its trajectory since earlier this year and say there’s zero chance it will impact Earth.