Infobox Constellation
name = Hydrus
abbreviation = Hyi
genitive = Hydri
symbology = the water snake
RA = 0h05m - 4h40m
dec= −58° - −82
areatotal = 243
arearank = 61st
numbermainstars = 3
numberbfstars = 19
numberstarsplanets = 1
numberbrightstars = 2
numbernearbystars = 1
brighteststarname = beta Hyi
starmagnitude = 2.82
neareststarname = beta Hyi
stardistance = 24.37
numbermessierobjects = none
meteorshowers = none
bordering =Dorado
Phoenix (corner)
latmax = 8
latmin = 90
month = November

Hydrus (pronEng|ˈhaɪdrəs, _la. Hydra, also referred to as "male Hydra" or "little Hydra") is a minor southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's "Uranometria" of 1603.

It should not be confused with Hydra. "Hydrus" is a name for a type of water snake. The constellation Hydra represents the Lernaean Hydra of Greek mythology, a serpentine water monster that could grow two more heads when one was severed.

Notable Deep-sky Objects

*IC 1717


Hydrus was named, circa 1595, by two Dutch navigators, Pieter Dirkszoon Keyser and Frederick de Houtman. It was charted in Johann Bayer's "Uranometria" in 1603. [ [http://chandra.harvard.edu/photo/constellations/hydrus.html Chandra :: Photo Album :: Constellation Hydrus ] ]

The only star in Hydrus that anyone seems to have named is γ Hyi, which in China was known as Foo Pih.



* Ian Ridpath and Wil Tirion (2007). "Stars and Planets Guide", Collins, London. ISBN 978-0007251209. Princeton University Press, Princeton. ISBN 978-0691135564.

External links

* [http://chandra.harvard.edu/photo/constellations/hydrus.html Chandra information about Hydrus]
* [http://www.allthesky.com/constellations/hydrus/constell.html The Deep Photographic Guide to the Constellations: Hydrus]
* [http://www.ianridpath.com/startales/hydrus.htm Star Tales – Hydrus]

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