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(21085) 1991 UL4

minor planet
Place asteroid Q4542208
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(21085) 1991 UL4

Summary

(21085) 1991 UL4 is an asteroid[1]. (21085) 1991 UL4 has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • (21085) 1991 UL4 is credited with the discovery of Seiji Ueda[3].
  • (21085) 1991 UL4 is credited with the discovery of Hiroshi Kaneda[4].
  • (21085) 1991 UL4's instance of is recorded as asteroid[5].
  • (21085) 1991 UL4's site of astronomical discovery is recorded as Kushiro[6].
  • (21085) 1991 UL4 followed (21084) 1991 UV3[7].
  • (21085) 1991 UL4 was followed by (21086) 1992 AO1[8].
  • (21085) 1991 UL4's minor planet group is recorded as asteroid belt[9].
  • (21085) 1991 UL4's parent astronomical body is recorded as Sun[10].
  • (21085) 1991 UL4's provisional designation is recorded as 1978 WW1[11].
  • (21085) 1991 UL4's provisional designation is recorded as 1991 UL4[12].
  • (21085) 1991 UL4's time of discovery or invention is recorded as October 18, 1991[13].
  • (21085) 1991 UL4's orbital eccentricity is recorded as {'amount': '+0.22'}[14].
  • (21085) 1991 UL4's orbital eccentricity is recorded as {'amount': '+0.2249290'}[15].
  • (21085) 1991 UL4's orbital eccentricity is recorded as {'amount': '+0.2233270023307593'}[16].
  • (21085) 1991 UL4's absolute magnitude is recorded as {'amount': '+15.1'}[17].
  • (21085) 1991 UL4's absolute magnitude is recorded as {'amount': '+15.23'}[18].
  • (21085) 1991 UL4's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+4.88672'}[19].
  • (21085) 1991 UL4's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+4.883362070580135'}[20].
  • (21085) 1991 UL4's orbital period is recorded as {'unit': 'Q577', 'amount': '+4.37'}[21].
  • (21085) 1991 UL4's orbital period is recorded as {'unit': 'Q573', 'amount': '+1598.765573770844'}[22].
  • (21085) 1991 UL4's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+75.56591'}[23].
  • (21085) 1991 UL4's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+75.50042121817752'}[24].
  • (21085) 1991 UL4's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.6732783'}[25].
  • (21085) 1991 UL4's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.675824181195277'}[26].
  • (21085) 1991 UL4's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3.275'}[27].

Body

Designation and Status

(21085) 1991 UL4's instance of is recorded as asteroid[5].

Why It Matters

(21085) 1991 UL4 has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[2]

Related Entities

Hiroshi Kaneda

References

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

Direct Wikidata claims

  1. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [3] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [4] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [6] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  14. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [17] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  16. [18] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [19] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  18. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [21] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  20. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [23] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  22. [24] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [25] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  24. [26] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  25. [27] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata sitelinks. 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). (21085) 1991 UL4. Retrieved May 3, 2026, from https://4ort.xyz/entity/21085-1991-ul4
MLA “(21085) 1991 UL4.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/21085-1991-ul4.
BibTeX @misc{4ortxyz_21085-1991-ul4_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(21085) 1991 UL4}}, year = {2026}, url = {https://4ort.xyz/entity/21085-1991-ul4}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (21085) 1991 UL4 — https://4ort.xyz/entity/21085-1991-ul4 (retrieved 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. 21d ago · KaleemBot bot · 2026-05-13 view diff on Wikidata ↗
    Orbital inclination → {'unit': 'Q28390', 'amount': '+4.88672'}, {'unit': 'Q28390', 'amount': '+4.883362070580135'}
    Orbital eccentricity → {'amount': '+0.22'}, {'amount': '+0.2249290'}, {'amount': '+0.2233270023307593'}
    Absolute magnitude → {'amount': '+15.1'}, {'amount': '+15.23'}
    Argument of periapsis → {'unit': 'Q28390', 'amount': '+316.76642'}, {'unit': 'Q28390', 'amount': '+316.6018615748432'}
    + 21 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ Added [[wikipedia:ur:(21085) 1991 یو ایل 4]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.