A new comet, C/2025 R2 (SWAN), is set to light up our October sky. Discovered by Ukrainian amateur astronomer Vladimir Bezugly on September 10, this comet has been brightening, creating excitement for stargazers. It will make its closest approach to Earth on October 21.
As it nears the sun, the heat causes frozen materials in its nucleus to change from solid to gas, a process called sublimation. This transformation produces a glowing shell that the solar wind pushes away, forming a trailing tail of dust and gas. If conditions are right, we might see this cosmic spectacle with the naked eye.
C/2025 R2 (SWAN) reached its closest point to the sun on September 12, coming just under 47 million miles away. To give you a better idea of brightness, it currently shines at magnitude 5.6. This means it’s faintly visible under very dark skies. The brighter the object, the lower its magnitude number. You’d need binoculars or a telescope to see it more clearly.
In the evenings throughout October, keep an eye on the sky. The comet will initially be near the star Xi Serpentis. On October 16, look for it about 5 degrees to the upper left of that star in the Serpens constellation. A stargazing app can help you find it if you’re unfamiliar with the stars.
As the month progresses, the comet will move towards the “teapot” asterism in Sagittarius, eventually passing through Scutum. By the end of October, it should be visible between the bright stars Sadalmelik and Sadalsuud in the constellation Aquarius, right above the half-lit moon.
Stargazers have been buzzing on social media about this event, with many sharing tips and excitement about spotting it. If you’re planning to capture images of this comet, consider using a DSLR camera to get the best shots. There are plenty of resources available to help you get equipped for the occasion. Check out expert reviews on the best binoculars and telescopes for skywatching.
As we look forward to this comet’s appearance, it’s worth noting that the excitement around such celestial events has grown. In the past, comets like Hale-Bopp in 1997 drew massive public interest, with millions viewing them. Today, social media allows for instant sharing and tips, enhancing the overall experience for stargazers everywhere.
For more details on this celestial wonder, you can explore the Comet Observation Database (COBS), which has been tracking its brightness. Happy stargazing!
