Core Viewpoint - The Orionid meteor shower, associated with Halley's Comet, is expected to peak on October 21, 2023, providing excellent viewing conditions due to the absence of moonlight [1][4][6]. Group 1: Meteor Shower Characteristics - The Orionid meteor shower is a medium-rate meteor shower observable in both the Northern and Southern Hemispheres, with a peak Zenithal Hourly Rate (ZHR) of about 20 meteors per hour during its maximum [2][4]. - The radiant point of the Orionid meteor shower is located between the constellations Orion and Gemini, with an active period from October 2 to early November [4]. - The meteors are characterized by their high speed, brightness, and distinct trails, with occasional bright fireballs [4]. Group 2: Observational Conditions - The peak of the meteor shower is expected around 21:00 on October 21, 2023, with ideal conditions for observation due to the new moon [6]. - The best time for viewing is after the radiant point rises around 22:00 until dawn, with several days before and after the peak also suitable for observation [6]. - Observers are advised to find locations with minimal light pollution, such as rural areas or high altitudes, and to use the naked eye for the best experience [6][8].

星联CSVA联合发起人蒋晨明介绍，猎户座流星雨是一个南北半球都适合观看的中等流量流星雨，极大 时ZHR（天顶每时出现率）约有20，它的母体是众所周知的哈雷彗星。作为人类确认的第一个周期彗 星，哈雷彗星"孕育"了每年上半年的宝瓶座η流星雨和下半年的猎户座流星雨。 2020年10月22日，在海南三亚拍摄的猎户座流星雨（多张叠加）。（罗弘扬摄，星联CSVA供图） 猎户座流星雨辐射点的位置位于猎户座和双子座之间，活跃期比较长，大概从10月2日开始，一直持续 到11月初，10月21日前后猎户座流星雨的流量会达到极大。猎户座流星雨特征非常明显，流星速度快、 亮度高且尾迹明显，有时还会出现耀眼的火球，非常壮观。 今年猎户座流星雨的极大预计出现在21日21时左右，无爆发预期，理想条件下每小时有20颗左右的流星 划过夜空。 通常每年10月，大名鼎鼎的哈雷彗星都会给地球派送一份"礼物"——猎户座流星雨。21日，猎户座流星 雨将迎来极大，恰逢无月夜，观测条件极佳，喜欢流星雨的发烧友不要错过。 2023年10月22日，在黑龙江大庆拍摄的猎户座流星雨（多张叠加）。（刘崴摄，星联CSVA供图） 流星是太空中的尘埃或碎片进入地球大气层时， ...