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semi-major axis

longest interval from a point on an ellipse to its center
Thing general Q171594
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semi-major axis

Summary

semi-major axis ranks in the top 2% of general entities by monthly Wikipedia readership (297 views/month).[1]

Key Facts

  • semi-major axis is a type of line segment[2].
  • semi-major axis is a type of semi-axis[3].
  • semi-major axis is a type of length[4].
  • semi-major axis is part of ellipse[5].
  • semi-major axis is part of spheroid[6].
  • semi-major axis is part of World Geodetic System 1984[7].
  • semi-major axis is the opposite of semi-minor axis[8].
  • semi-major axis's equivalent class is recorded as https://www.commoncoreontologies.org/ont00000911[9].
  • semi-major axis's different from is recorded as semi-major axis of an orbit[10].
  • semi-major axis's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4[11].
  • semi-major axis's maintained by WikiProject is recorded as WikiProject Mathematics[12].
  • semi-major axis's P14870 is recorded as ont00000911[13].

Body

Definition and Type

Recorded subclass of include line segment[2], semi-axis[3], and length[4]. semi-major axis is the opposite of semi-minor axis[8].

Use and Application

Part of include ellipse[5]; spheroid[6], a mathematical object[14]; and World Geodetic System 1984[7], a geodetic reference system[15].

Why It Matters

semi-major axis ranks in the top 2% of general entities by monthly Wikipedia readership (297 views/month).[1] It has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.[16] It is known by 76 alternative names across languages and contexts.[17]

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . wikidata.org.

Inline context (facts about related entities)

  1. [14] ↑ . Wikidata. wikidata.org. → on this site
  2. [15] ↑ . Wikidata. wikidata.org. → on this site

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [16] ↑ . Wikidata sitelinks. wikidata.org.
  3. [17] ↑ . 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). semi-major axis. Retrieved October 4, 2026, from https://4ort.xyz/entity/semi-major-axis
MLA “semi-major axis.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/semi-major-axis.
BibTeX @misc{4ortxyz_semi-major-axis_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{semi-major axis}}, year = {2026}, url = {https://4ort.xyz/entity/semi-major-axis}, note = {Accessed: 2026-10-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): semi-major axis — https://4ort.xyz/entity/semi-major-axis (retrieved 2026-10-04)

Canonical URL: https://4ort.xyz/entity/semi-major-axis · Last refreshed:

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. 25d ago · Mahir256 · 2026-09-09 view diff on Wikidata ↗
    P14870 → ont00000911
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/53024|batch #53024]]"
  2. 5w ago · عُثمان · 2026-08-30 view diff on Wikidata ↗
    Equivalent class → https://www.commoncoreontologies.org/ont00000911
    "/* wbsetclaim-create:2||1 */ [[Property:P1709]]: https://www.commoncoreontologies.org/ont00000911"
  3. 22w ago · GeertivpBot bot · 2026-05-01 view diff on Wikidata ↗
    Subclass of → line segment, semi-axis, length
    Part of → ellipse, spheroid, World Geodetic System 1984
    Opposite of → semi-minor axis
    Aliases → —
    + 5 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ [[Property:P361]]: [[Q11902211]], #pwb Copy label Add onderdeel van (P361)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.