This may be Utah’s last chance to see comet Tsuchinshan-ATLAS in its most vibrant color
Oct 15, 2024, 12:55 PM | Updated: Oct 18, 2024, 9:17 am

Two women stand in front of a display of the comet Tsuchinshan-ATLAS in Utah on Oct. 14, 2024. (Courtesy Alyssa Christensen)
(Courtesy Alyssa Christensen)
SALT LAKE CITY — After a comet known as the Tsuchinshan-ATLAS dazzled the skies of Earth’s northern hemisphere, folks in Utah may only get one more night to acutely view the historic event.
According to KSL Meteorologist Matt Johnson, the comet would be visible through Oct. 26. However, the time to see the comet at its brightest would likely end after Tuesday night’s probable show.
The C/2023 Tsuchinshan-ATLAS Comet will be visible through October 26th. However its brightest viewing times are Oct 14-15th, so take advantage tonight!
1📸: Mike Saemisch / Brian Head
2📸: Cassie Yale / Fairview
3📸: Weston Larsen/ Willard Bay
4📸: Richard Bobo / Utah pic.twitter.com/Lf11knOm9A— Matthew Johnson (@KSL_Matt) October 15, 2024
The “dirty snowball” would dwindle for two reasons, Johnson said. The first — simply because the comet is now on a trajectory moving away from Earth, where before Saturday it was headed toward our planet.
“It was closest to Earth around the 12th of October and it’s now leaving our viewpoint,” Johnson said.

A view of Tsuchinshan-ATLAS in comparison to the position of the rest of the solar system as it appeared on Oct. 12, 2024, when it reached its closest point to Earth. (The University of Arizona)
Further, he said the comet’s proximity to the sun on the way here had a lot to do with how visible it was — more visible than any other comet in 27 years, according to EarthSky.
“Part of what makes it so visible is when it passes close to the sun, which (in this case) was in early September,” Johnson said. “As it’s making its way by Earth and beyond, it’s moving further away and getting further away from the sun so it doesn’t have a lot of heat to further the burning and evaporating of all the ice and rock.”
The comet traveled from the Oort Cloud, according to NASA, which is a giant spherical shell surrounding the solar system and could be home to billions or even trillions of objects.

A view of Tsuchinshan-ATLAS in comparison to the position of the rest of the solar system as it appeared on Oct. 15, 2024 — three days after it reached its closest point to Earth. (The University of Arizona)
Viewing times
Johnson said Tsuchinshan-ATLAS could be seen on the western horizon, 45 minutes after sunset — which for Tuesday was set for 6:47 p.m. in Salt Lake City, according to the National Weather Service. Tuesday night would also offer clear skies, Johnson said, but more clouds would be moving in as the state’s first possible storm of the season was expected later in the week.
Editor’s note: This article was updated to improve website formatting.