Since 1993 John R. Ratje (b. 1946) has been the assistant director and site manager of Mt. Graham International Observatory, a division of Steward Observatory. Before joining Steward Observatory in 1984, he was an oil-company engineer and manager.
Avastatud: 27-11-1994 Avastamiskoht: Oizumi Avastajad: Kobayashi, T.