Two Comets Approach Perihelion in April 2026

In April 2026, two comets, C/2026 A1 (MAPS) and C/2025 R3 (PanSTARRS), will reach their perihelion, presenting notable events for the astronomical community.

Comet C/2026 A1 (MAPS), discovered on January 13, 2026, by astronomers at the AMACS1 Observatory in Chile, is a member of the Kreutz sungrazer group. This group includes comets that pass extremely close to the Sun. On April 4, 2026, at approximately 14:23 UTC, Comet MAPS is expected to pass within 99,000 miles (160,000 kilometers) of the Sun's surface. Due to this close approach, the comet will be subjected to intense solar heat and gravitational forces, raising questions about its survival. If it withstands these conditions, it could become visible to the naked eye in the days following perihelion. However, its proximity to the Sun may make observation challenging.

Comet C/2025 R3 (PanSTARRS) was discovered on September 8, 2025, by the Pan-STARRS survey. This long-period comet will reach perihelion on April 19, 2026, at a distance of 0.50 astronomical units (AU) from the Sun. It is projected to reach a peak brightness of around magnitude +3, potentially making it visible to the naked eye under favorable conditions. The comet will be observable in the dawn sky, rising approximately 1 hour and 43 minutes before the Sun and reaching an altitude of 13° above the eastern horizon before fading from view as dawn breaks.

Astronomers and skywatchers are closely monitoring both comets, as their behavior during perihelion will provide valuable insights into cometary dynamics and composition. Observations will also help determine the potential for future naked-eye visibility.