Proper Motions and Parallaxes

Drs。加州大学圣克鲁斯分校利克天文台的伯顿·琼斯、阿诺德·克莱莫拉和罗伯特·汉森将继续研究利克北部固有运动项目。该计划中第二个时代的主要阶段的观测已接近完成，今后两年的重点将放在板块测量和准备机器可读的调查形式上。对各类恒星运动的研究是了解银河系的基础。固有运动为太阳运动、星系旋转和速度色散的研究以及恒星距离和光度的统计测定提供了观测基础。Lick北方固有运动计划将通过提供覆盖北方三分之二天空的大约30万颗恒星的绝对固有运动来满足许多基本的观测需求。

Drs. Burton Jones, Arnold Klemola, and Robert Hanson at the Lick Observatory, University of California, Santa Cruz will continue work on the Lick Northern Proper Motion program. Observations for a major phase of the second epoch in this program are nearly complete, and the emphasis for the next two years will be on plate measurements and the preparation of a machine readable form of the survey. The study of the motions of various classes of stars is fundamental to an understanding of our Galaxy. Proper motions provide the observational basis for the study of solar motion, galactic rotation, and velocity dispersions, and for the statistical determination of stellar distances and luminosities. The Lick Northern Proper Motion program will meet many of these basic observational needs by providing absolute proper motions for some 300,000 stars covering the northern two-thirds of the sky.