Editing Tucana (section)

==Characteristics==
[[File:Constellation Tucana.jpg|thumb|left|The constellation of Tucana, the toucan, as it can be seen by the naked eye]]
Irregular in shape, Tucana is bordered by [[Hydrus]] to the east, Grus and Phoenix to the north, [[Indus (constellation)|Indus]] to the west and [[Octans]] to the south. Covering 295 square degrees, it ranks 48th of the 88 constellations in size. The recommended three-letter abbreviation for the constellation, as adopted by the [[International Astronomical Union]] in 1922, is "Tuc".<ref name=pa30_469/> The official constellation boundaries, as set by Belgian astronomer [[Eugène Joseph Delporte|Eugène Delporte]] in 1930, are defined by a polygon of 10 segments. In the [[equatorial coordinate system]], the [[right ascension]] coordinates of these borders lie between {{RA|22|08.45}} and {{RA|01|24.82}}, while the [[declination]] coordinates are between −56.31° and −75.35°.<ref name=boundary/> As one of the deep southern constellations, it remains below the horizon at latitudes north of the [[30th parallel north|30th parallel]] in the [[Northern Hemisphere]], and is [[Circumpolar star|circumpolar]] at latitudes south of the [[50th parallel south|50th parallel]] in the [[Southern Hemisphere]].<ref name="motz">{{cite book|last=Motz|first=Lloyd|author2=Nathanson, Carol |title=The Constellations: An Enthusiast's Guide to the Night Sky|publisher=Aurum Press|location=London, United Kingdom|date=1991|pages=385, 389|isbn=978-1-85410-088-7}}</ref>