NGC 643
NGC 643 is an open cluster located on the far outskirts of the Small Magellanic Cloud in the southern constellation of Hydrus , approximately 200 , 000 light-years from Earth . 
<triplet> NGC 643 <subj> Hydrus <obj> constellation <triplet> Small Magellanic Cloud <subj> Hydrus <obj> constellation <triplet> Hydrus <subj> constellation <obj> instance of