Editing Musca (section)

==Characteristics==
Musca is bordered by [[Crux]] to the north, [[Carina (constellation)|Carina]] to the west, [[Chamaeleon]] to the south, [[Apus]] and [[Circinus (constellation)|Circinus]] to the east, and [[Centaurus]] to the northeast. Covering 138&nbsp;square degrees and 0.335% of the night sky, it ranks 77th of the 88 constellations in size.<ref name=bagnall>{{cite book |last=Bagnall |first=Philip M. |title=The Star Atlas Companion: What You Need to Know about the Constellations |publisher=Springer  |location=New York, New York |date=2012 |isbn=978-1-4614-0830-7 |pages=303–07|url=https://books.google.com/books?id=KcIg02TKW6QC&pg=PA303}}</ref> The three-letter abbreviation for the constellation, as adopted by the [[International Astronomical Union]] in 1922, is "Mus".<ref name="pa30_469">{{cite journal | last=Russell | first=Henry Norris |author-link=Henry Norris Russell | title=The New International Symbols for the Constellations | journal=[[Popular Astronomy (US magazine)|Popular Astronomy]] | volume=30 | page=469 | bibcode=1922PA.....30..469R | date=1922 }}</ref> The official constellation boundaries, as set by Belgian astronomer [[Eugène Joseph Delporte|Eugène Delporte]] in 1930, are defined by a polygon of six segments. In the [[equatorial coordinate system]], the [[right ascension]] coordinates of these borders lie between {{RA|11|19.3}} and {{RA|13|51.1}}, while the [[declination]] coordinates are between −64.64° and −75.68°.<ref name="boundary">{{Cite journal | title=Musca, Constellation Boundary | journal=The Constellations | publisher=International Astronomical Union | url=http://www.iau.org/public/constellations/#mus | access-date=19 December 2013 }}</ref> The whole constellation is visible to observers south of latitude [[14th parallel north|14°N]].<ref name=tirionconst>{{cite web| url=http://www.ianridpath.com/constellations2.html | title=Constellations: Lacerta–Vulpecula | work= Star Tales |author=Ian Ridpath |author-link=Ian Ridpath|publisher=self-published | access-date= 24 June 2014}}</ref>{{efn|1=While parts of the constellation technically rise above the horizon to observers between 14°N and [[25th parallel north|25°N]], stars within a few degrees of the horizon are essentially unobservable.<ref name=tirionconst/>}}