Allegheny Observatory Trigonometric Parallax Program

阿勒格尼天文台的三角视差程序利用了 一些最精确的设备来确定非常 天体物理学用高精度坐标和质量 距离太阳250秒差距内的有趣天体 该计划已 足够的精度，以获得可靠的三角距离 像附近的星星团、巨星和 变星;定义质量光度的部分 三角函数域之外的关系 技术;并探测低质量的轨道附近的恒星。 恒星视差的测定是一项基本的 几乎对天文学的所有领域都很重要，因为 许多物理参数的确定需要了解 距离 视差测定的局限性直到相当 最近，在大多数天体测量系统中， 系统误差限制了确定的真实准确度 的距离. 所有迹象都表明阿勒格尼的努力 天文台已成功地纠正了这个问题。 的 盖特伍德博士项目的开发阶段现已完成， 生产观察正在进行中。

The Allegheny Observatory trigonometric parallax program utilizes some of the most accurate equipment of its kind to determine very high precision parallaxes and masses for astrophysically interesting objects within 250 parsecs of the Sun. The program has sufficient precision to obtain reliable trigonometric distances of such luminosity standards as nearby star clusters, giant stars, and variable stars; to define portions of the mass-luminosity relationship previously outside of the domain of trigonometric techniques; and to detect low mass orbiting nearby stars. The determination of stellar parallaxes is of fundamental importance to almost all areas of astronomy, since the determination of many physical parameters requires knowledge of distance. The limitation in parallax determination up until quite recently has been the presence in most astrometric systems of systematic errors that limit the true accuracy of the determined distances. All indications are that efforts at the Allegheny Observatory have successfully rectified this problem. The development phase of Dr. Gatewood's program is now complete, and production observing is proceeding.