Phobos

natural satellite of Mars
Thing moon_of_mars Q7547
Phobos
NASA / JPL-Caltech / University of Arizona · Public Domain · Wikimedia
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Phobos

Summary

Phobos is a moon of Mars[1]. Phobos has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • Phobos is credited with the discovery of Asaph Hall[3].
  • Phobos's instance of is recorded as moon of Mars[4].
  • Phobos's site of astronomical discovery is recorded as United States Naval Observatory[5].
  • Phobos is named after Phobos[6].
  • Phobos's Commons category is recorded as Phobos (moon)[7].
  • Phobos's parent astronomical body is recorded as Mars[8].
  • Phobos's time of discovery or invention is recorded as August 18, 1877[9].
  • Phobos's time of discovery or invention is recorded as August 17, 1877[10].
  • Phobos's IPA transcription is recorded as ˈfoːbɔs[11].
  • Phobos's topic's main category is recorded as Category:Phobos (moon)[12].
  • Phobos's Commons gallery is recorded as Phobos[13].
  • Phobos's orbital eccentricity is recorded as {'amount': '+0.0151'}[14].
  • Phobos's apparent magnitude is recorded as {'amount': '+11.8'}[15].
  • Phobos's described by source is recorded as Otto's encyclopedia[16].
  • Phobos's topic has template is recorded as Template:GeoTemplate/phobos[17].
  • Phobos's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+26.04'}[18].
  • Phobos's density is recorded as {'unit': 'Q13147228', 'amount': '+1.876'}[19].
  • Phobos's mass is recorded as {'unit': 'Q2655272', 'amount': '+10.66'}[20].
  • Phobos's orbital period is recorded as {'unit': 'Q573', 'amount': '+0.3189'}[21].
  • Phobos's semi-major axis of an orbit is recorded as {'unit': 'Q828224', 'amount': '+9377.1'}[22].
  • Phobos's diameter is recorded as {'unit': 'Q828224', 'amount': '+22.5'}[23].
  • Phobos's albedo is recorded as {'amount': '+0.071'}[24].
  • Phobos's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4[25].
  • Phobos's surface gravity is recorded as {'unit': 'Q1051665', 'amount': '+0.0057'}[26].

Body

Definition and Type

Phobos's instance of is recorded as moon of Mars[4].

Origins

Phobos is named after Phobos[6].

Influence

Things named for Phobos include Phobos Ridge[27], a ridge[28].

Why It Matters

Phobos has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2] Phobos is known by 16 alternative names across languages and contexts.[29]

Entities named for Phobos include Phobos Ridge[27], a ridge[28].

References

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

Direct Wikidata claims

  1. [4] . wikidata.org.
  2. [3] . A Short History of Astronomy. wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . iopscience.iop.org. iopscience.iop.org. Provenance: wikidata.org.
  8. [10] . A Short History of Astronomy. 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] . ssd.jpl.nasa.gov. Retrieved . ssd.jpl.nasa.gov. Provenance: 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.

Inverse relationships (entities pointing at this one)

  1. [27] . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikidata sitelinks. wikidata.org.
  2. [29] . 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). Phobos. Retrieved May 3, 2026, from https://4ort.xyz/entity/phobos
MLA “Phobos.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/phobos.
BibTeX @misc{4ortxyz_phobos_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Phobos}}, year = {2026}, url = {https://4ort.xyz/entity/phobos}, note = {Accessed: 2026-05-03}}
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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. 4w ago · FearlessSeamus · 2026-06-12 view diff on Wikidata ↗
    Aliases
    Topic's main category Category:Phobos (moon)
    Apparent magnitude {'amount': '+11.8'}
    Mass {'unit': 'Q2655272', 'amount': '+10.66'}
    + 20 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ [[Property:P2234]]: 5,695±32 cubic kilometre"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.