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(20975) 1981 ER4

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(20975) 1981 ER4

Summary

(20975) 1981 ER4 is an asteroid[1].

Key Facts

  • (20975) 1981 ER4 is credited with the discovery of Schelte J. Bus[2].
  • (20975) 1981 ER4's instance of is recorded as asteroid[3].
  • (20975) 1981 ER4's site of astronomical discovery is recorded as Siding Spring Observatory[4].
  • (20975) 1981 ER4's follows is recorded as (20974) 1981 EO2[5].
  • (20975) 1981 ER4's followed by is recorded as (20976) 1981 EA6[6].
  • (20975) 1981 ER4's minor planet group is recorded as asteroid belt[7].
  • (20975) 1981 ER4's parent astronomical body is recorded as Sun[8].
  • (20975) 1981 ER4's provisional designation is recorded as 1981 ER4[9].
  • (20975) 1981 ER4's provisional designation is recorded as 1999 VN2[10].
  • (20975) 1981 ER4's time of discovery or invention is recorded as +1981-03-02T00:00:00Z[11].
  • (20975) 1981 ER4's JPL Small-Body Database SPK-ID is recorded as 20020975[12].
  • (20975) 1981 ER4's orbital eccentricity is recorded as {'amount': '+0.12'}[13].
  • (20975) 1981 ER4's orbital eccentricity is recorded as {'amount': '+0.1178263'}[14].
  • (20975) 1981 ER4's orbital eccentricity is recorded as {'amount': '+0.1194614771013436'}[15].
  • (20975) 1981 ER4's absolute magnitude is recorded as {'amount': '+13.6'}[16].
  • (20975) 1981 ER4's absolute magnitude is recorded as {'amount': '+13.8'}[17].
  • (20975) 1981 ER4's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+10.05597'}[18].
  • (20975) 1981 ER4's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+10.05502961482818'}[19].
  • (20975) 1981 ER4's orbital period is recorded as {'unit': 'Q577', 'amount': '+5.05'}[20].
  • (20975) 1981 ER4's orbital period is recorded as {'unit': 'Q573', 'amount': '+1845.054378329109'}[21].
  • (20975) 1981 ER4's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+211.44942'}[22].
  • (20975) 1981 ER4's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+211.4288374695405'}[23].
  • (20975) 1981 ER4's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.9432912'}[24].
  • (20975) 1981 ER4's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.944018235283443'}[25].
  • (20975) 1981 ER4's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3.290'}[26].

Body

Designation and Status

(20975) 1981 ER4'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). (20975) 1981 ER4. Retrieved May 3, 2026, from https://4ort.xyz/entity/20975-1981-er4
MLA “(20975) 1981 ER4.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/20975-1981-er4.
BibTeX @misc{4ortxyz_20975-1981-er4_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(20975) 1981 ER4}}, year = {2026}, url = {https://4ort.xyz/entity/20975-1981-er4}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (20975) 1981 ER4 — https://4ort.xyz/entity/20975-1981-er4 (retrieved 2026-05-03)

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