Norad ID: 740
| Spacetrack Directory Name | ECHO 2 (A-12) |
| Orbit launches |
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| Deorbitation date |
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| Days in orbit | 1960 |
| Country/organisation of origin | USA (US) |
| Starting point | AFWTR (Vandenberg Air Force Base, USA) |
ECHO 2 (A-12), 740 was a payload satellite owned by NASA LaRC (US) that was launched on Sat, 25 Jan 1964 UTC via a THOR SLV-2 AGENA B launch vehicle from the Air Force Western Test Range (AFWTR). Payloads include a variety of satellites, spacecraft, and rockets equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.