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21774 O'Brien

asteroid
Place asteroid Q2216702
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21774 O'Brien

Summary

21774 O'Brien is an asteroid[1]. It has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • 21774 O'Brien is credited with the discovery of Lowell Observatory Near-Earth-Object Search[3].
  • 21774 O'Brien's instance of is recorded as asteroid[4].
  • 21774 O'Brien's site of astronomical discovery is recorded as Anderson Mesa Station[5].
  • 21774 O'Brien's follows is recorded as (21773) 1999 RH216[6].
  • 21774 O'Brien's followed by is recorded as 21775 Tsiganis[7].
  • 21774 O'Brien's minor planet group is recorded as asteroid belt[8].
  • 21774 O'Brien's parent astronomical body is recorded as Sun[9].
  • 21774 O'Brien's provisional designation is recorded as 1992 SG21[10].
  • 21774 O'Brien's provisional designation is recorded as 1998 HF143[11].
  • 21774 O'Brien's provisional designation is recorded as 1999 RR217[12].
  • 21774 O'Brien's time of discovery or invention is recorded as +1999-09-03T00:00:00Z[13].
  • 21774 O'Brien's Freebase ID is recorded as /m/0cc5hfy[14].
  • 21774 O'Brien's JPL Small-Body Database SPK-ID is recorded as 20021774[15].
  • 21774 O'Brien's significant event is recorded as naming[16].
  • 21774 O'Brien's orbital eccentricity is recorded as {'amount': '+0.08'}[17].
  • 21774 O'Brien's orbital eccentricity is recorded as {'amount': '+0.0843533'}[18].
  • 21774 O'Brien's orbital eccentricity is recorded as {'amount': '+0.08389001725283414'}[19].
  • 21774 O'Brien's absolute magnitude is recorded as {'amount': '+15.7'}[20].
  • 21774 O'Brien's absolute magnitude is recorded as {'amount': '+15.6'}[21].
  • 21774 O'Brien's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+6.65490'}[22].
  • 21774 O'Brien's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+6.661255442409665'}[23].
  • 21774 O'Brien's orbital period is recorded as {'unit': 'Q577', 'amount': '+3.58'}[24].
  • 21774 O'Brien's orbital period is recorded as {'unit': 'Q573', 'amount': '+1307.197752547638'}[25].
  • 21774 O'Brien's rotation period is recorded as {'unit': 'Q25235', 'amount': '+27.431'}[26].
  • 21774 O'Brien's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+155.75568'}[27].

Body

Designation and Status

21774 O'Brien's instance of is recorded as asteroid[4].

Why It Matters

21774 O'Brien has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[2] It is known by 9 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] ↑ . Minor Planet Center 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] ↑ . Minor Planet Center database. 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] ↑ . 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] ↑ . 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] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [21] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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] ↑ . 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.
  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). 21774 O'Brien. Retrieved May 3, 2026, from https://4ort.xyz/entity/21774-o-brien
MLA “21774 O'Brien.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/21774-o-brien.
BibTeX @misc{4ortxyz_21774-o-brien_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{21774 O'Brien}}, year = {2026}, url = {https://4ort.xyz/entity/21774-o-brien}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 21774 O'Brien — https://4ort.xyz/entity/21774-o-brien (retrieved 2026-05-03)

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