年度最小蛾眉月来了！什么时候观赏效果最佳？

Group 1 - The "Annual Small Crescent Moon" occurs when the moon is in the crescent phase and simultaneously at its apogee, resulting in a smaller visual diameter [3][7] - The average lunar phase cycle is approximately 29.5306 days, with the moon's appearance changing based on the relative positions of the sun, earth, and moon [5] - The distance of the moon from the earth varies, reaching over 400,000 kilometers at its farthest and less than 360,000 kilometers at its closest, creating a difference of about 50,000 kilometers [7] Group 2 - The smallest crescent moon of the year is observed on September 26, while the largest occurs on April 1 [9] - Optimal viewing times for the crescent moon are on the evenings of September 25 and 26, shortly after sunset and before moonset, particularly in the southwestern direction [10][12]