Rare Blue Micromoon to Grace Night Skies This Weekend

Skywatchers will witness a distinct celestial rarity this weekend as a Blue Micromoon reaches its peak, marking the intersection of a calendar-based lunar cycle and the Moon’s furthest orbital distance from Earth. The event is set to occur at 8:45 UTC on May 31, 2026, offering a unique, albeit subtle, perspective.

The phenomenon combines a Blue Moon—defined as the second full moon within a single calendar month—with a Micromoon, which occurs when the lunar body hits its apogee. At its peak, the Moon will sit approximately 252,360 miles from Earth. While the term might suggest a vibrant hue, the Moon will retain its standard pale white or golden-orange appearance. Observers can expect the celestial body to appear roughly 6% smaller and 10% dimmer than an average full moon.

Gianluca Masi, an astronomer with the Virtual Telescope Project, notes that the size difference remains difficult to discern without a direct side-by-side comparison. For those in the Southern Hemisphere and across the Pacific, the event offers an additional spectacle: the Moon will pass in front of Antares, the prominent red star within the Scorpius constellation. Northern Hemisphere viewers will still see the Moon in close proximity to the star. No specialized equipment is required for viewing, though binoculars may assist in resolving surface details. To capture the scale, experts suggest that photographers compare this weekend's imagery against future supermoon shots.