Official

　On October 31, Halloween day was blessed with fine weather and decorated the night sky with a clear "unusual full moon".　　　　　　　　　　　　　　　　The first rarity is "the smallest full moon in 2020." The orbit of the moon that rotates around the earth is elliptical and the distance between the earth and the moon is not constant, and the orbit changes due to the influence of gravity such as the sun and the earth, so it is said that the size of the appearance differs every time. In 2020, the diameter of the appearance is about 14% smaller and the brightness is about 30% dark compared to April 8, which was the full moon closest to the earth.　　　　　　　　　　　　　　　　　　　　　The second rarity is, following October 2, "the second full moon of this month (commonly called" Blue Moon ")".　　　　　　　　　　　　　The third rarity is "The full moon on October 31 (Halloween) for the first time in 46 years since 1974." The next Halloween full moon will be 38 years later in 2058.　　In front of the Kachidokibashi Museum, you can see the "valuable moon" of "Halloween full moon", "the smallest this year" and "blue moon", which rarely encounters above Kachidokibashi.