Discovered 1868 July 11 by J. C. Watson at Ann Arbor. Independently discovered 1868 July 18 by C. Wolf at Paris.
Named after the goddess of the lower world and of darkness in the upper world. (H 14)
The naming was delegated to the National Academy of Sciences, Washington, D.C. The name was submitted by a committee of four including B. Peirce and B. A. Gould.
J. Meeus suggested the interesting interpretation that the choice of this name could have been influenced by the fact that the Greek word ‘hekaton’ means 100.