Comet SWAN25F Emerges in Northern Dawn Skies—Catch It Before It Vanishes

A recently identified comet, known as SWAN25F, has appeared in the early morning skies of the Northern Hemisphere and is already observable with binoculars. The comet was first detected on April 1, 2025, by Australian amateur astronomer Michael Mattiazo, who discovered it in images captured by SWAN, an instrument onboard the ESA’s SOHO spacecraft. Currently, Comet SWAN25F is swiftly moving through the constellation backdrop and is anticipated to brighten over the next few weeks, possibly becoming visible to the unaided eye if it survives its close encounter with the sun.

How and When to Spot Comet SWAN25F

Right now, Comet SWAN25F can be seen low in the east-northeastern sky just before dawn. Although it remains dim—around magnitude 7.5 to 8—it is within reach of binoculars or a small telescope. Should the comet withstand its perihelion (the closest point to the sun) on May 1, it might shift into the evening sky and become visible around sunset in early May.

At present, it is traversing the constellation Pegasus en route to Andromeda. A useful landmark for observers is the bright star Alpheratz (Alpha Andromedae), near which the comet is expected to pass approximately on April 13. Binocular users may notice its faint, greenish coma caused by diatomic carbon (C₂) molecules, along with a subtle dust tail extending several times the apparent size of the moon.

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What Lies Ahead for Comet SWAN25F

Early orbital calculations predict that SWAN25F will reach its closest distance to Earth and the sun on May 1, coming within roughly 31 million miles of the sun—well inside Mercury’s orbit. If it survives this intense proximity, the comet might brighten to a magnitude between 4.5 and 5, potentially allowing for naked-eye viewing, although it will likely remain close to the horizon.

As it speeds along, observers will notice its rapid movement against the stars, witnessing its position shift noticeably night after night. Whether it becomes a bright and lasting spectacle or fades away hinges on how it fares during this critical close solar approach—an event known for its unpredictability in cometary behavior.