This weekend, skywatchers will be treated to a rare celestial event: a Blue Moon that is also a micromoon. The last such occurrence was in 2023, and the next will not happen until 2053.
What Is a Blue Micromoon?
A Blue Moon refers to the second full Moon in a single calendar month. Despite its name, the Moon does not appear blue. A micromoon occurs when the full Moon is at its farthest point from Earth, known as apogee, making it appear slightly smaller and dimmer than usual. The combination of both events is uncommon.
When and Where to See It
The full Moon will peak at 9:45am BST on Sunday, May 31, but will appear full for a couple of days either side. In the UK, moonrise is around 10pm on May 31, while in the US, it appears at about 9pm local time. Clear skies are expected over most of England and Wales on Friday and Saturday night, with patchy cloud on Sunday night.
Viewing Tips
Astronomers recommend heading to a location with a clear view of the southern horizon. The Moon will travel from southeast to southwest, rising after sunset and setting before dawn.
Why Is This Event Special?
The Moon will reach apogee on June 1, at a distance of 406,366 kilometers (252,504 miles) from Earth. At that point, it will appear up to 14% smaller than a supermoon. The next Blue Moon will occur on December 31, 2028, but the next Blue micromoon will not happen until 2053.
