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(18306) 1981 EF9

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(18306) 1981 EF9

Summary

(18306) 1981 EF9 is an asteroid[1].

Key Facts

  • (18306) 1981 EF9 is credited with the discovery of Schelte J. Bus[2].
  • (18306) 1981 EF9's instance of is recorded as asteroid[3].
  • (18306) 1981 EF9's site of astronomical discovery is recorded as Siding Spring Observatory[4].
  • (18306) 1981 EF9's follows is recorded as (18305) 1981 DL1[5].
  • (18306) 1981 EF9's followed by is recorded as (18307) 1981 ER10[6].
  • (18306) 1981 EF9's minor planet group is recorded as asteroid belt[7].
  • (18306) 1981 EF9's parent astronomical body is recorded as Sun[8].
  • (18306) 1981 EF9's provisional designation is recorded as 1981 EF9[9].
  • (18306) 1981 EF9's provisional designation is recorded as 2000 SX168[10].
  • (18306) 1981 EF9's time of discovery or invention is recorded as +1981-03-01T00:00:00Z[11].
  • (18306) 1981 EF9's JPL Small-Body Database SPK-ID is recorded as 20018306[12].
  • (18306) 1981 EF9's orbital eccentricity is recorded as {'amount': '+0.10'}[13].
  • (18306) 1981 EF9's orbital eccentricity is recorded as {'amount': '+0.1045086'}[14].
  • (18306) 1981 EF9's orbital eccentricity is recorded as {'amount': '+0.1062153593313599'}[15].
  • (18306) 1981 EF9's absolute magnitude is recorded as {'amount': '+14.8'}[16].
  • (18306) 1981 EF9's absolute magnitude is recorded as {'amount': '+15.0'}[17].
  • (18306) 1981 EF9's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+3.98456'}[18].
  • (18306) 1981 EF9's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+3.982071482017291'}[19].
  • (18306) 1981 EF9's orbital period is recorded as {'unit': 'Q577', 'amount': '+3.51'}[20].
  • (18306) 1981 EF9's orbital period is recorded as {'unit': 'Q573', 'amount': '+1279.954381160115'}[21].
  • (18306) 1981 EF9's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+283.74212'}[22].
  • (18306) 1981 EF9's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+283.6810122664476'}[23].
  • (18306) 1981 EF9's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.3079853'}[24].
  • (18306) 1981 EF9's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.307087376556378'}[25].
  • (18306) 1981 EF9's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+2.549'}[26].

Body

Designation and Status

(18306) 1981 EF9'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] ↑ . wikidata.org.
  8. [9] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] ↑ . wikidata.org.
  13. [14] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  14. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  16. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  18. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  20. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  22. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [24] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  24. [25] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  25. [26] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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). (18306) 1981 EF9. Retrieved May 3, 2026, from https://4ort.xyz/entity/18306-1981-ef9
MLA “(18306) 1981 EF9.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/18306-1981-ef9.
BibTeX @misc{4ortxyz_18306-1981-ef9_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(18306) 1981 EF9}}, year = {2026}, url = {https://4ort.xyz/entity/18306-1981-ef9}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (18306) 1981 EF9 — https://4ort.xyz/entity/18306-1981-ef9 (retrieved 2026-05-03)

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