文章基本信息

标题：SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XVIII
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作者：Brian D. Mason ; William I. Hartkopf ; Elizabeth A. Friedman 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2012
卷号：143
期号：5
DOI：10.1088/0004-6256/143/5/124
语种：English
出版社：American Institute of Physics
摘要：The results of 2490 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1462 mean relative positions and range in separation from 056 to 7180, with a mean separation of 1481. This is the 18th in this series of papers and covers the period 2011 January 3 through 2011 December 18. Also presented are four pairs which are resolved for the first time, thirteen other pairs which appear to be lost, and linear elements for four additional pairs.
关键词：binaries: general;binaries: visual Online-only material: color figure; machine-readable and VO tables