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(257385) 2009 ST121

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(257385) 2009 ST121

Summary

(257385) 2009 ST121 is an asteroid[1].

Key Facts

  • (257385) 2009 ST121 is credited with the discovery of Spacewatch[2].
  • (257385) 2009 ST121's instance of is recorded as asteroid[3].
  • (257385) 2009 ST121's site of astronomical discovery is recorded as Kitt Peak National Observatory[4].
  • (257385) 2009 ST121's follows is recorded as (257384) 2009 SO60[5].
  • (257385) 2009 ST121's followed by is recorded as (257386) 2009 SN122[6].
  • (257385) 2009 ST121's minor planet group is recorded as Jupiter trojan[7].
  • (257385) 2009 ST121's minor planet group is recorded as Greek camp trojan asteroid[8].
  • (257385) 2009 ST121's parent astronomical body is recorded as Sun[9].
  • (257385) 2009 ST121's provisional designation is recorded as 2009 ST121[10].
  • (257385) 2009 ST121's time of discovery or invention is recorded as +2009-09-18T00:00:00Z[11].
  • (257385) 2009 ST121's JPL Small-Body Database SPK-ID is recorded as 20257385[12].
  • (257385) 2009 ST121's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.05785639799785764'}[13].
  • (257385) 2009 ST121's Lagrangian point is recorded as L4-Jupiter-Sun[14].
  • (257385) 2009 ST121's absolute magnitude is recorded as {'unit': '1', 'amount': '+13.47'}[15].
  • (257385) 2009 ST121's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+7.041705224134986'}[16].
  • (257385) 2009 ST121's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+4219.894918515897'}[17].
  • (257385) 2009 ST121's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+212.3816797787247'}[18].
  • (257385) 2009 ST121's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+5.110563706768511'}[19].
  • (257385) 2009 ST121's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+5.406242514580717'}[20].
  • (257385) 2009 ST121's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+4.814884898956305'}[21].
  • (257385) 2009 ST121's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+242.7944080682576'}[22].
  • (257385) 2009 ST121's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+53.94148007932963'}[23].
  • (257385) 2009 ST121's Google Knowledge Graph ID is recorded as /g/1hhzgw95z[24].
  • (257385) 2009 ST121's Minor Planet Center body ID is recorded as 257385[25].
  • (257385) 2009 ST121's epoch is recorded as May 5, 2025[26].

Body

Designation and Status

(257385) 2009 ST121's instance of is recorded as asteroid[3].

References

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

Direct Wikidata claims

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

Class ancestry

  1. [1] ↑ . Wikidata. 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). (257385) 2009 ST121. Retrieved May 3, 2026, from https://4ort.xyz/entity/-257385-2009-st121
MLA “(257385) 2009 ST121.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/-257385-2009-st121.
BibTeX @misc{4ortxyz_-257385-2009-st121_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(257385) 2009 ST121}}, year = {2026}, url = {https://4ort.xyz/entity/-257385-2009-st121}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (257385) 2009 ST121 — https://4ort.xyz/entity/-257385-2009-st121 (retrieved 2026-05-03)

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