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(56086) 1999 AA21

minor planet
Place asteroid Q4543937
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(56086) 1999 AA21

Summary

(56086) 1999 AA21 is an asteroid[1]. (56086) 1999 AA21 is known by 3 alternative names across languages and contexts.[2]

Key Facts

  • (56086) 1999 AA21 is credited with the discovery of Yoshisada Shimizu[3].
  • (56086) 1999 AA21 is credited with the discovery of Takeshi Urata[4].
  • (56086) 1999 AA21's instance of is recorded as asteroid[5].
  • (56086) 1999 AA21's site of astronomical discovery is recorded as Nachi-Katsuura Observatory[6].
  • (56086) 1999 AA21 followed (56085) 1999 AV19[7].
  • (56086) 1999 AA21 was followed by (56087) 1999 AH22[8].
  • (56086) 1999 AA21's minor planet group is recorded as asteroid belt[9].
  • (56086) 1999 AA21's parent astronomical body is recorded as Sun[10].
  • (56086) 1999 AA21's provisional designation is recorded as 1980 BH2[11].
  • (56086) 1999 AA21's provisional designation is recorded as 1999 AA21[12].
  • (56086) 1999 AA21's provisional designation is recorded as 2001 OM13[13].
  • (56086) 1999 AA21's time of discovery or invention is recorded as January 13, 1999[14].
  • (56086) 1999 AA21's orbital eccentricity is recorded as {'amount': '+0.2073533281273102'}[15].
  • (56086) 1999 AA21's absolute magnitude is recorded as {'amount': '+13.31'}[16].
  • (56086) 1999 AA21's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+23.72306632848749'}[17].
  • (56086) 1999 AA21's orbital period is recorded as {'unit': 'Q573', 'amount': '+1389.301282899475'}[18].
  • (56086) 1999 AA21's rotation period is recorded as {'unit': 'Q25235', 'amount': '+2.77037'}[19].
  • (56086) 1999 AA21's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+333.0421962985075'}[20].
  • (56086) 1999 AA21's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.436680979502219'}[21].
  • (56086) 1999 AA21's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+2.941934890186518'}[22].
  • (56086) 1999 AA21's periapsis is recorded as {'unit': 'Q1811', 'amount': '+1.93142706881792'}[23].
  • (56086) 1999 AA21's argument of periapsis is recorded as {'unit': 'Q28390', 'amount': '+35.31231327118974'}[24].
  • (56086) 1999 AA21's mean anomaly is recorded as {'unit': 'Q28390', 'amount': '+116.1241505156065'}[25].
  • (56086) 1999 AA21's diameter is recorded as {'unit': 'Q828224', 'amount': '+5.24'}[26].
  • (56086) 1999 AA21's albedo is recorded as {'amount': '+0.37'}[27].

Body

Designation and Status

(56086) 1999 AA21's instance of is recorded as asteroid[5].

Why It Matters

(56086) 1999 AA21 is known by 3 alternative names across languages and contexts.[2]

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] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  14. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [18] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [24] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [25] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  24. [26] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  25. [27] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata aliases. wikidata.org.

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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). (56086) 1999 AA21. Retrieved May 3, 2026, from https://4ort.xyz/entity/56086-1999-aa21
MLA “(56086) 1999 AA21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/56086-1999-aa21.
BibTeX @misc{4ortxyz_56086-1999-aa21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(56086) 1999 AA21}}, year = {2026}, url = {https://4ort.xyz/entity/56086-1999-aa21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (56086) 1999 AA21 — https://4ort.xyz/entity/56086-1999-aa21 (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. 26d ago · KaleemBot bot · 2026-05-17 view diff on Wikidata ↗
    Follows → (56085) 1999 AV19
    Orbital period → {'unit': 'Q573', 'amount': '+1389.301282899475'}
    Mean anomaly → {'unit': 'Q28390', 'amount': '+116.1241505156065'}
    Aliases → —
    + 22 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ Added [[wikipedia:ur:(56086) 1999 اے اے 21]]"
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