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Proteus

moon of Neptune
Thing moon_of_neptune Q16081
Proteus
Voyager 2, NASA · Public Domain · Wikimedia
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Summary

Proteus is a moon of Neptune[1]. Proteus draws 1,286 Wikipedia views per month (moon of neptune category, ranking #2 of 15).[2]

Key Facts

  • Discoverer or inventor: Stephen P. Synnott[3], Voyager 2[4]
  • Instance of: regular moon[5]
  • Named after: Proteus[6]
  • Commons category: Proteus (moon)[7]
  • Parent astronomical body: Neptune[8]
  • Provisional designation: S/1989 N 1[9]
  • Time of discovery or invention: June 16, 1989[10]
  • Topic's main category: Category:Proteus (moon)[11]
  • Commons gallery: Proteus (moon)[12]
  • Orbital eccentricity: 0.00053[13]
  • Apparent magnitude: 19.7[14]
  • Topic has template: Template:GeoTemplate/proteus[15]
  • Orbital inclination: 0.524[16], 0.026[17]
  • Mass: 50[18]
  • Temperature: 51[19]
  • Radius: 209[20], 210[21]
  • Orbital period: 1.122314[22]
  • Semi-major axis of an orbit: 117,647[23]
  • Volume as quantity: 34,000,000[24]
  • Albedo: 0.096[25]
  • Epoch: August 18, 1989[26]

Why It Matters

Proteus has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[27] Proteus is known by 27 alternative names across languages and contexts.[28]

Related Entities

Voyager 2

References

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

Direct Wikidata claims

  1. [5] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . 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] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [27] ↑ . Wikidata sitelinks. wikidata.org.
  3. [28] ↑ . 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). Proteus. Retrieved October 16, 2026, from https://4ort.xyz/entity/proteus-q16081-2
MLA “Proteus.” 4ort.xyz Knowledge Graph, 4ort.xyz, 16 Oct. 2026, https://4ort.xyz/entity/proteus-q16081-2.
BibTeX @misc{4ortxyz_proteus-q16081-2_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Proteus}}, year = {2026}, url = {https://4ort.xyz/entity/proteus-q16081-2}, note = {Accessed: 2026-10-16}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Proteus — https://4ort.xyz/entity/proteus-q16081-2 (retrieved 2026-10-16)

Canonical URL: https://4ort.xyz/entity/proteus-q16081-2 · 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. 21d ago · ~2026-50558-89 · 2026-09-25 view diff on Wikidata ↗
    Semi-major axis of an orbit → {'amount': '+117647'}
    Instance of → —
    Apparent magnitude → {'amount': '+19.7'}
    Orbital inclination → {'amount': '+0.524'}, {'amount': '+0.026'}
    + 19 other properties edited (see Wikidata diff for full list)
    "/* wbremoveclaims-remove:1| */ Perimeter: 424 kilometre"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.