Comet Pan-STARRS Reaches Peak Brightness This Sunday: Your Last Chance to Catch It
Comet Pan-STARRS, also known as comet C/2025 R3 (Pan-STARRS), will get closest to the sun on Sunday, April 19 — and should reach its brightest. Here's how to see it.
Skywatchers have one final opportunity to witness Comet Pan-STARRS at its most spectacular this Sunday, April 19, when the icy visitor from the outer solar system makes its closest approach to the sun in an event astronomers call perihelion.
Officially designated C/2025 R3 (Pan-STARRS), the comet is expected to reach its maximum brightness around perihelion, potentially becoming visible to the naked eye under dark skies. Observers with binoculars or a small telescope will have the best chance of spotting its glowing coma and trailing tail.
To find the comet, head outside after sunset and look toward the western horizon. The comet is expected to appear low in the sky, so a clear, unobstructed view in that direction is essential. Light pollution can significantly hinder visibility, so experts recommend traveling away from city lights for the best experience.
Timing is critical. The window for viewing will be relatively narrow, as the comet sits close to the sun in the sky and will set not long after twilight fades. Skywatchers should aim to begin looking approximately 30 to 45 minutes after local sunset.
Comet Pan-STARRS was discovered using the Panoramic Survey Telescope and Rapid Response System, or Pan-STARRS, observatory in Hawaii — the same facility responsible for identifying several other notable comets in recent years. Scientists have been tracking C/2025 R3 since its discovery and have refined predictions for its brightness as it approaches the sun.
While no comet is ever guaranteed to perform as predicted — they are famously unpredictable celestial objects — current estimates suggest this one could put on a memorable show. If clouds or poor conditions prevent viewing on Sunday, observers may still catch a glimpse in the days immediately following perihelion, though the comet will gradually dim as it moves away from the sun.
Whether you are a seasoned astronomer or a curious first-timer, this weekend offers a rare chance to witness a cosmic traveler up close. Set a reminder, find a dark spot, and look west after sunset for what could be one of the most striking astronomical events of the year.