| Identifiants | NORAD | 21809 |
| COSPAR | 1991-076 | |
| Country | United States | |
| Mission | Surveillance and other military | |
| Constellation | Unknown | |
| Launch | Date Hour | 1991-11-08 07:07 |
| Launch site | 11, Vandenberg AFB, United States (NASA) | |
| Rocket | Titan 403A, Titan IV (NASA) | |
| Orbite | Type | LEO |
| Perigee (km) | 436 | |
| Apogee (km) | 1764 | |
| Inclinaison (°) | 63.3 | |
| Open source URL | Heavens above | https://heavens-above.com/satinfo.aspx?satid=21809 |
| N2YO | https://www.n2yo.com/satellite/?s=21809 | |
| NASA | https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1991-076E | |
| Wikipedia FR | Unknown | |
| Wikipedia EN | https://en.wikipedia.org/wiki/Naval_Ocean_Surveillance_System | |
| Priority | 2 | |
| Update | 2022-06-01 | |
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