When to observe Blue Moon and Micromoon in Indonesia tonight

Have you ever heard of the terms Blue Moon and Micromoon? Tonight, both celestial phenomena that often spark curiosity will occur simultaneously in Indonesia. The term Blue Moon refers to two full moons occurring within the same calendar month, while a Micromoon happens when a full moon is near its farthest point from Earth, appearing slightly smaller. Interestingly, astronomical data shows the peaks of these phenomena do not align exactly. However, astronomers still categorise tonight’s full moon as a Micromoon because the time difference between the peak full moon and apogee is minimal — just 19 hours (the shortest gap in 2026). With such close timing, the effect of the Blue Moon at its farthest point can be practically observed together from sunset Sunday until early Monday morning. Note that this late May apogean full moon isn’t the smallest of the year; the smallest will occur in late June 2026, when Earth and Moon reach their maximum distance. Marufin Sudibyo, an amateur astronomer from Ekliptika, explained that these terms are popular folklore with no scientific basis in astronomy. For Micromoon, astronomers typically use ‘apogean full moon’. ‘Like the terms Supermoon and Blue Moon, Micromoon lacks astronomical scientific backing. Astronomers generally refer to it as an apogean full moon, as the full moon occurs near the apogee point — where the Moon is farthest from Earth,’ he said. Due to its position near the farthest point from Earth, tonight’s full moon will appear approximately 10% smaller than during a Supermoon. The good news is no special equipment or expensive telescopes are needed to observe tonight’s full moon.