海尔—波普彗星的视运动及其天文坐标分析

The Apparent Motion of the Comet Hale-Bopp andan Analysis of Its Astronomical Coordinates

海尔—波普彗星是本世纪出现的一颗长周期大彗星，由于其独特的轨道特征，使该彗星在近日点前后视亮度大，观测容易，视运动表现为合日前后的顺行，每日可观测时数长，在我国大部分地区一天可观测两次，高纬地区出现恒显的特征，并且出现彗尾相对地平的指向日出前日落后不同的罕见现象。本文运用日心天球和地心天球坐标分析其视运动特征。

? The comet Hale-Bopp is a long period large comet that appeared this century.Because of its special orbital characteristics, this comet shows characteristics such as more apparent brightness, easy observation, longer possible observation hours, being observable twice a day in most areas in China and perpetual apparition in high latitude regions. Its tail direction is different before sunrise and after sunset, which is a rare phenomenon. This paper analyses the characteristics of this comets apparent motion with astronomical coordinates.