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(27981) 1997 UK21

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(27981) 1997 UK21

Summary

(27981) 1997 UK21 is an asteroid[1]. (27981) 1997 UK21 ranks in the top 2% of asteroid entities by monthly Wikipedia readership (2 views/month).[2]

Key Facts

  • (27981) 1997 UK21 is credited with the discovery of Beijing Schmidt CCD Asteroid Program[3].
  • (27981) 1997 UK21's instance of is recorded as asteroid[4].
  • (27981) 1997 UK21's site of astronomical discovery is recorded as Xinglong Station[5].
  • (27981) 1997 UK21 followed (27980) 1997 UA21[6].
  • (27981) 1997 UK21 was followed by 27982 Atsushimiyazaki[7].
  • (27981) 1997 UK21's minor planet group is recorded as asteroid belt[8].
  • (27981) 1997 UK21's parent astronomical body is recorded as Sun[9].
  • (27981) 1997 UK21's provisional designation is recorded as 1976 UM10[10].
  • (27981) 1997 UK21's provisional designation is recorded as 1997 UK21[11].
  • (27981) 1997 UK21's time of discovery or invention is recorded as October 20, 1997[12].
  • (27981) 1997 UK21's orbital eccentricity is recorded as {'amount': '+0.17'}[13].
  • (27981) 1997 UK21's orbital eccentricity is recorded as {'amount': '+0.1669900'}[14].
  • (27981) 1997 UK21's orbital eccentricity is recorded as {'amount': '+0.1639884168413858'}[15].
  • (27981) 1997 UK21's absolute magnitude is recorded as {'amount': '+14.2'}[16].
  • (27981) 1997 UK21's absolute magnitude is recorded as {'amount': '+14.32'}[17].
  • (27981) 1997 UK21's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+4.05677'}[18].
  • (27981) 1997 UK21's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+4.057724149753298'}[19].
  • (27981) 1997 UK21's orbital period is recorded as {'unit': 'Q577', 'amount': '+4.16'}[20].
  • (27981) 1997 UK21's orbital period is recorded as {'unit': 'Q573', 'amount': '+1521.799715122678'}[21].
  • (27981) 1997 UK21's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+23.40859'}[22].
  • (27981) 1997 UK21's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+23.26133186159923'}[23].
  • (27981) 1997 UK21's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.5873046'}[24].
  • (27981) 1997 UK21's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.589242425197154'}[25].
  • (27981) 1997 UK21's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3.019'}[26].
  • (27981) 1997 UK21's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3.013848191323785'}[27].

Body

Designation and Status

(27981) 1997 UK21's instance of is recorded as asteroid[4].

Why It Matters

(27981) 1997 UK21 ranks in the top 2% of asteroid entities by monthly Wikipedia readership (2 views/month).[2] (27981) 1997 UK21 has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[28]

References

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

Direct Wikidata claims

  1. [4] ↑ . 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. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] ↑ . wikidata.org.
  12. [14] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  13. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  14. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  15. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  17. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  19. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  21. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [24] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  23. [25] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  24. [26] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] ↑ . 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). (27981) 1997 UK21. Retrieved May 3, 2026, from https://4ort.xyz/entity/27981-1997-uk21
MLA “(27981) 1997 UK21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/27981-1997-uk21.
BibTeX @misc{4ortxyz_27981-1997-uk21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(27981) 1997 UK21}}, year = {2026}, url = {https://4ort.xyz/entity/27981-1997-uk21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (27981) 1997 UK21 — https://4ort.xyz/entity/27981-1997-uk21 (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. 23d ago · KaleemBot bot · 2026-05-13 view diff on Wikidata ↗
    Longitude of ascending node → {'unit': 'Q28390', 'amount': '+23.40859'}, {'unit': 'Q28390', 'amount': '+23.26133186159923'}
    Follows → —
    Semi-major axis of an orbit → {'unit': 'Q1811', 'amount': '+2.5873046'}, {'unit': 'Q1811', 'amount': '+2.589242425197154'}
    Apoapsis → {'unit': 'Q1811', 'amount': '+3.019'}, {'unit': 'Q1811', 'amount': '+3.013848191323785'}
    + 20 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ Added [[wikipedia:ur:(27981) 1997 یو کے 21]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.