Editing Star system (section)

===Multiple star designations===

The components of multiple stars can be specified by appending the suffixes ''A'', ''B'', ''C'', etc., to the system's designation. Suffixes such as ''AB'' may be used to denote the pair consisting of ''A'' and ''B''. The sequence of letters ''B'', ''C'', etc. may be assigned in order of separation from the component ''A''.<ref name=Heintz19>{{cite book |last=Heintz |first=W. D. |date=1978 |page=[https://archive.org/details/DoubleStars/page/19 19] |title=Double Stars |publisher=D. Reidel Publishing Company |location=Dordrecht |isbn=90-277-0885-1 |url=https://archive.org/details/DoubleStars/page/19 }}</ref><ref name=fmt>[http://ad.usno.navy.mil/wds/wdsweb_format.txt Format, The Washington Double Star Catalog] {{webarchive|url=https://web.archive.org/web/20080412092018/http://ad.usno.navy.mil/wds/wdsweb_format.txt |date=12 April 2008 }}, Brian D. Mason, Gary L. Wycoff, and William I. Hartkopf, Astrometry Department, [[United States Naval Observatory]]. Accessed on line 20 August 2008.</ref> Components discovered close to an already known component may be assigned suffixes such as ''Aa'', ''Ba'', and so forth.<ref name=fmt />