Assertion: satellite's orbit | /r/HasProperty | 1,519 to 1,687 km
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text: Echo 1A (commonly referred to as Echo 1) was successfully put into a orbit of 944 to 1,048 miles (1,519 to 1,687 km) by another Thor-Delta, and a microwave transmission from the Jet Propulsion Laboratory in Pasadena, California, was relayed by the satellite to Bell Laboratories in Holmdel, New Jersey, on August 12, 1960.