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steradian

SI derived unit of solid angle
Intangible dimensionless_unit Q177612
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Summary

steradian is a dimensionless unit[1]. steradian draws 2,474 Wikipedia views per month (dimensionless unit category, ranking #2 of 6).[2]

Key Facts

  • Instance of: SI unit with special name[3], UCUM derived unit[4], unit of solid angle[5]
  • Measured physical quantity: solid angle[6]
  • Based on: metre[7]
  • Commons category: Steradian[8]
  • Described by source: Armenian Soviet Encyclopedia[9], ISO 80000-3:2006 Quantities and units — Part 3: Space and time[10], Great Soviet Encyclopedia (1926–1947)[11]
  • Conversion to SI unit: 1 steradian[12]
  • Studied by: solid geometry[13]
  • Wikidata SPARQL query equivalent: wd:Q177612 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)[14]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[15]
  • Unit symbol: sr[16], ср[17]
  • Maintained by WikiProject: WikiProject Mathematics[18]

Why It Matters

steradian has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[19] steradian is known by 38 alternative names across languages and contexts.[20]

References

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

Direct Wikidata claims

  1. [3] ↑ . SI Brochure (9th edition). wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . ISO 80000-1:2009 Quantities and units—Part 1: General. wikidata.org.
  5. [7] ↑ . ISO 80000-1:2009 Quantities and units—Part 1: General. wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . Logopedia. wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] ↑ . Wikidata sitelinks. wikidata.org.
  3. [20] ↑ . Wikidata aliases. 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). steradian. Retrieved October 13, 2026, from https://4ort.xyz/entity/steradian
MLA “steradian.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/steradian.
BibTeX @misc{4ortxyz_steradian_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{steradian}}, year = {2026}, url = {https://4ort.xyz/entity/steradian}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): steradian — https://4ort.xyz/entity/steradian (retrieved 2026-10-13)

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