“千年一遇”的彗星来了，如何观测？

Core Viewpoint - C/2025 A6 (Lemmon) comet, referred to as Lemmon comet, is a "once-in-a-millennium" comet that has recently gained global attention due to its brightness and visibility during its close approach to Earth [1][2] Group 1 - Lemmon comet is expected to be the brightest comet of the year, with its brightness increasing from magnitude 21.5 to between 4 and 5 [2] - The comet has an orbital period of approximately 1150 to 1350 years, classifying it as a long-period comet [2] - Observers across various locations in China, including Beijing, Tianjin, Sichuan, Shenzhen, and Xinjiang, have successfully captured images of the comet during dawn or dusk [5][6] Group 2 - Observers are advised to prepare their equipment and choose locations away from city lights for optimal viewing conditions, such as rural areas or mountain tops [8] - The visibility of the comet will decrease after it passes the perihelion, making it harder to observe in the northern hemisphere [6] - The comet's appearance includes a faint dust tail and a narrow ion tail, providing unique visual effects when photographed in scenic locations [5][6]