Editing Binary star (section)

===Discoverer designations===
Double stars are also designated by an abbreviation giving the discoverer together with an index number.<ref>pp. 307–308, ''Observing and Measuring Double Stars'', Bob Argyle, ed., London: Springer, 2004, {{ISBN|1-85233-558-0}}.</ref> α Centauri, for example, was found to be double by Father Richaud in 1689, and so is designated ''RHD 1''.<ref name=aitken1 /><ref>Entry 14396-6050, discoverer code RHD 1AB,[http://ad.usno.navy.mil/wds/Webtextfiles/wdsnewframe3.html The Washington Double Star Catalog] {{Webarchive|url=https://archive.today/20120708194616/http://ad.usno.navy.mil/wds/Webtextfiles/wdsnewframe3.html |date=2012-07-08 }}, [[United States Naval Observatory]]. Accessed on line August 20, 2008.</ref> These discoverer codes can be found in the [[Washington Double Star Catalog]].<ref>[http://ad.usno.navy.mil/wds/Webtextfiles/wdsnewframe.html References and discoverer codes, The Washington Double Star Catalog] {{Webarchive|url=https://web.archive.org/web/20110517105248/http://ad.usno.navy.mil/wds/Webtextfiles/wdsnewframe.html |date=2011-05-17 }}, [[United States Naval Observatory]]. Accessed on line August 20, 2008.</ref>