May blue moon coincides with a micro moon tonight

Tonight, May 31, 2026, the second full moon of May, known as a blue moon, rises while the Moon sits near apogee, making it a micro moon. A blue moon simply means a second full moon in one calendar month, while a micro moon occurs when the full phase lines up with lunar apogee, causing the Moon to appear about 14 percent smaller in diameter and roughly 30 percent dimmer than at perigee. The coincidence matters for skywatchers and photographers because you can see a full moon that is both unusually small in apparent size and a calendar rarity, though it will not actually look blue and offers a neat comparison to supermoon photos.