Project 10073 Record Card — Vicinity Yokohama, Japan, 31 Aug 60

This document consists of a Project 10073 record card detailing a sighting on August 31, 1960, in the vicinity of Yokohama, Japan. At 1930 local time, a bright object, described as being as luminous as a first-magnitude star, was observed. The object was noted at a position of 3450N 14158E, with a bearing of 330 degrees true at 38 degrees elevation. The object's course was estimated at 080 degrees true. At 1932 local time, the object appeared coincident with the pole star, and it was last seen at 1943 local time at a bearing of 058 degrees true at an elevation of 10 degrees. The official conclusion reached by the investigating agency was that the object was the satellite Echo I. This conclusion was supported by the fact that multiple identical reports were received from the region, all matching the known characteristics of the satellite. The document also includes a press clipping from August 29, 1960, which provides a timetable for the visibility of the Echo I satellite and discusses the impact of the Earth's shadow on the satellite's visibility, noting that the satellite's thin, cellophane-like material was not adversely affected by its passage through the shadow.