SRV 520 - Norad ID: 90
| Spacetrack Directory Name | DISCOVERER 20 DEB |
| Alternative name | SRV 520 |
| Orbit launches |
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| Deorbitation date |
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| Days in orbit | 256 |
| Country/organisation of origin | USA (US) |
| Starting point | AFWTR (Vandenberg Air Force Base, USA) |
DISCOVERER 20 DEB, 90 was space debris originally from an American launch on Fri, 17 Feb 1961 UTC via a THOR AGENA B launch vehicle from the Air Force Western Test Range (AFWTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.