UFO sighted in Southeast Asia in 1961

Summary

A witness in Southeast Asia reported an object in the sky on August 7, 1961. The object appeared at an elevation of 50 degrees and disappeared behind clouds at 20 degrees elevation. It was observed for 12 minutes, indicating prolonged movement. The exact location of the sighting was 31°53'N, 129°00'E. Although other possibilities like balloons or aircraft were initially considered, orbital calculations suggested the object was likely the satellite Echo I. This satellite, known for its high visibility, was moving northeast, matching the sighting description.

The object's description and the duration of the sighting aligned with the characteristics of Echo I, a spherical inflated satellite that reflected sunlight with great brightness. Orbital calculations confirmed that the satellite was on a northeast orbit at the time of the sighting, supporting the conclusion that the observed object was indeed Echo I. This case is an example of how UFO sightings can often be explained by known phenomena, especially when precise data and orbital calculations are available.