Parallaxes and Proper Motions of Northern and Southern Stars

这项拨款支持一项观测计划的继续 为了确定距离（视差），绝对星等， 和一个选择的样本的自行相对附近 星 该项目在北方和 南半球与望远镜观测 位于弗吉尼亚州和澳大利亚。 这些数据是从非常精确的测量中获得的。 附近恒星的位置、运动和亮度 天文学家使用的宇宙距离尺度的基础。 的 Ianna和Fredrick博士进行的长期天体测量计划 在弗吉尼亚大学的研究提供了重要的贡献， 这个基础数据库。

This grant supports the continuation of an observational program to determine the distances (parallaxes), the absolute magnitudes, and the proper motions of a select sample of relatively nearby stars. The project has components based in both the Northern and Southern Hemispheres with observations obtained from telescopes located in Virginia and Australia. Data which are obtained from very precise measurements of the positions, the motions, and the brightnesses of nearby stars form the basis for the cosmic distance scale used by astronomers. The long term astrometry program conducted by Drs. Ianna and Fredrick at the University of Virginia provides an essential contribution to this fundamental data base.