New comet SWAN25F is turning heads — and telescopes — toward the morning sky

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The comet was first spotted by an amateur astronomer looking through SOHO spacecraft data.

two people looking at morning sky, one is looking through binoculars and the other a large telescope.
(Image credit: m-gucci via Getty Images)

The newly discovered comet is already putting on a show for amateur astronomers with telescopes at the ready.

Comet SWAN25F, first spotted in data from the SWAN instrument aboard the sun-watching SOHO spacecraft, is now bright enough for amateur astronomers to track and photograph with backyard gear.

Australian amateur Michael Mattiazzo discovered the comet in late March using SWAN imagery, which maps hydrogen in the solar wind according to Spaceweather.com.

On April 3, Mike Olason captured stunning images from Tucson, Arizona, when the comet had a magnitude of 10.6. Olason then captured the comet again on April 6 as it brightened to magnitude 8.4, a thin, extended tail is now visible.

In Austria, skywatchers Michael Jaeger and Gerald Rhemann photographed SWAN25F’s tail stretching more than 2 degrees across the sky.

Nick James of the British Astronomical Association told Spacweather.com that while it's too early to predict the comet's peak brightness, it's clearly brightening fast. "We need a few more days of observations," he told Spaceweather.com, "but it should at least become a binocular object."

Amateur astronomer Pepe Chambó pointed out that the comet's tail shows several jets and breaks in a post on X (translated from Spanish by Google). "It has brightened to magnitude 8.3, visible with binoculars." Chambó wrote.

Comet SWAN25F is currently best seen low in the morning sky and views are expected to improve over the coming weeks. If you want to see the comet for yourself you can track its position, check the Minor Planet Center's Possible Comet Confirmation Page and select SWAN25F to generate a custom ephemeris for your location.

Note that it is not possible to see the comet with the naked eye at this moment. The object will need to brighten to at least a magnitude of around 6 to be visible without a telescope or binoculars under dark skies.

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Daisy Dobrijevic
Daisy Dobrijevic
Skywatching Editor

Daisy Dobrijevic joined Space.com in February 2022, having previously worked as a staff writer for All About Space magazine. She completed an editorial internship with BBC Sky at Night Magazine and worked at the National Space Centre, communicating space science to the public.

Daisy holds a PhD in plant physiology and a Master's in Environmental Science. Based in Nottingham, U.K., she covers all things space, with a special focus on solar activity and space weather. She also has a keen interest in astrotourism and is always on the lookout for the next northern lights adventure.

She will be a guest speaker aboard HX's Solar Eclipse Expedition in August 2026 and will join Hurtigruten as an onboard astronomer for a northern lights sailing in January 2027.