Hydrus, "The Lesser Snake", was one of Johann Bayer's
constellations, found first in his 1603 publication Uranometria.
It was meant to be the southern hemisphere's answer to Hydra, but it has
far fewer objects of interest.
Hydrus is a rather stiff snake, perhaps mostly
resembling a cobra, with its head erect and body curled. As with most of
these obscure constellations, its Bayer
stars are far from complete, and fairly faint.
h3475 is a fine binary about one and a half degrees just north
(and slightly west) of alpha Hydri.