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USA 81

American SIGINT satellite
Vehicle signals_intelligence_satellite Q111499477
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Key Facts

  • Country: United States[1]
  • Operator: United States Air Force[2]
  • Follows: USA 45[3]
  • Manufacturer: Lockheed Corporation[4]
  • Part of: P-11[5]
  • Space launch vehicle: Titan 23G[6]
  • Country of origin: United States[7]
  • Powered by: spacecraft solar array[8]
  • Type of orbit: low Earth orbit[9]
  • UTC date of spacecraft launch: April 25, 1992[10]
  • Significant event: rocket launch[11]
  • Start point: Vandenberg Space Launch Complex 4 West[12]
  • Mass: 1360 kg[13]
  • Service life: 3 years[14]

Related Entities

artificial satellite

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [1] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.
  2. [2] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.
  3. [3] ↑ . wikidata.org.
  4. [4] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.
  5. [5] ↑ . wikidata.org.
  6. [6] ↑ . Jonathan's Space Report. wikidata.org.
  7. [7] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.
  8. [8] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.
  9. [9] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.
  10. [10] ↑ . Jonathan's Space Report. wikidata.org.
  11. [11] ↑ . Jonathan's Space Report. wikidata.org.
  12. [12] ↑ . Jonathan's Space Report. wikidata.org.
  13. [13] ↑ . designation-systems.net. designation-systems.net. Provenance: wikidata.org.
  14. [14] ↑ . space.skyrocket.de. space.skyrocket.de. Provenance: wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). USA 81. Retrieved October 4, 2026, from https://4ort.xyz/entity/usa-81
MLA “USA 81.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/usa-81.
BibTeX @misc{4ortxyz_usa-81_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{USA 81}}, year = {2026}, url = {https://4ort.xyz/entity/usa-81}, note = {Accessed: 2026-10-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): USA 81 — https://4ort.xyz/entity/usa-81 (retrieved 2026-10-04)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 10d ago · Huntster · 2026-10-04 view diff on Wikidata ↗
    Significant event → rocket launch
    Cospar id → 1992-023A
    Space launch vehicle → Titan 23G
    Mass → {'unit': 'Q11570', 'amount': '+1360'}
    + 6 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Mass: 1,360 kilogram, Copying from Q141504205"
  2. 10d ago · Huntster · 2026-10-04 view diff on Wikidata ↗
    Country of origin → United States
    Wikidata description → American SIGINT satellite
    Instance of → —
    Powered by → spacecraft solar array
    + 10 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Instance of: signals intelligence satellite, Copying from USA 45"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.