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(9347) 1991 RY21

minor planet
Place asteroid Q666609
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(9347) 1991 RY21

Summary

(9347) 1991 RY21 is an asteroid[1]. (9347) 1991 RY21 has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • (9347) 1991 RY21 is credited with the discovery of Henry E. Holt[3].
  • (9347) 1991 RY21's instance of is recorded as asteroid[4].
  • (9347) 1991 RY21's site of astronomical discovery is recorded as Palomar Observatory[5].
  • (9347) 1991 RY21's follows is recorded as Q929288[6].
  • (9347) 1991 RY21's followed by is recorded as (9348) 1991 RH25[7].
  • (9347) 1991 RY21's minor planet group is recorded as asteroid belt[8].
  • (9347) 1991 RY21's parent astronomical body is recorded as Sun[9].
  • (9347) 1991 RY21's provisional designation is recorded as 1991 RY21[10].
  • (9347) 1991 RY21's provisional designation is recorded as 1979 FH4[11].
  • (9347) 1991 RY21's provisional designation is recorded as 1996 XY30[12].
  • (9347) 1991 RY21's time of discovery or invention is recorded as +1991-09-15T00:00:00Z[13].
  • (9347) 1991 RY21's Freebase ID is recorded as /m/0h56nyq[14].
  • (9347) 1991 RY21's JPL Small-Body Database SPK-ID is recorded as 20009347[15].
  • (9347) 1991 RY21's orbital eccentricity is recorded as {'amount': '+0.16'}[16].
  • (9347) 1991 RY21's orbital eccentricity is recorded as {'amount': '+0.1570720'}[17].
  • (9347) 1991 RY21's orbital eccentricity is recorded as {'amount': '+0.1587355982615589'}[18].
  • (9347) 1991 RY21's absolute magnitude is recorded as {'amount': '+13.7'}[19].
  • (9347) 1991 RY21's absolute magnitude is recorded as {'amount': '+13.88'}[20].
  • (9347) 1991 RY21's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+3.31021'}[21].
  • (9347) 1991 RY21's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+3.309376470234376'}[22].
  • (9347) 1991 RY21's orbital period is recorded as {'unit': 'Q577', 'amount': '+3.74'}[23].
  • (9347) 1991 RY21's orbital period is recorded as {'unit': 'Q573', 'amount': '+1365.484502469493'}[24].
  • (9347) 1991 RY21's rotation period is recorded as {'unit': 'Q25235', 'amount': '+4.028'}[25].
  • (9347) 1991 RY21's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+101.92538'}[26].
  • (9347) 1991 RY21's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+101.8833252147898'}[27].

Body

Designation and Status

(9347) 1991 RY21's instance of is recorded as asteroid[4].

Why It Matters

(9347) 1991 RY21 has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[2] (9347) 1991 RY21 is known by 3 alternative names across languages and contexts.[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] ↑ . Minor Planet Center database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [11] ↑ . Minor Planet Center database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [12] ↑ . Minor Planet Center 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] ↑ . Freebase Data Dumps. wikidata.org.
  13. [15] ↑ . JPL Small-Body Database. Retrieved . wikidata.org.
  14. [16] ↑ . 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] ↑ . 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] ↑ . Wikidata sitelinks. wikidata.org.
  2. [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). (9347) 1991 RY21. Retrieved May 3, 2026, from https://4ort.xyz/entity/9347-1991-ry21
MLA “(9347) 1991 RY21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/9347-1991-ry21.
BibTeX @misc{4ortxyz_9347-1991-ry21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(9347) 1991 RY21}}, year = {2026}, url = {https://4ort.xyz/entity/9347-1991-ry21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (9347) 1991 RY21 — https://4ort.xyz/entity/9347-1991-ry21 (retrieved 2026-05-03)

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