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(99980) 1981 ER18

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Place asteroid Q28518390
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(99980) 1981 ER18

Summary

(99980) 1981 ER18 is an asteroid[1].

Key Facts

  • (99980) 1981 ER18 is credited with the discovery of Schelte J. Bus[2].
  • (99980) 1981 ER18's instance of is recorded as asteroid[3].
  • (99980) 1981 ER18's site of astronomical discovery is recorded as Siding Spring Observatory[4].
  • (99980) 1981 ER18's follows is recorded as (99979) 1981 EE16[5].
  • (99980) 1981 ER18's followed by is recorded as (99981) 1981 EF20[6].
  • (99980) 1981 ER18's minor planet group is recorded as asteroid belt[7].
  • (99980) 1981 ER18's parent astronomical body is recorded as Sun[8].
  • (99980) 1981 ER18's provisional designation is recorded as 1981 ER18[9].
  • (99980) 1981 ER18's time of discovery or invention is recorded as +1981-03-02T00:00:00Z[10].
  • (99980) 1981 ER18's JPL Small-Body Database SPK-ID is recorded as 20099980[11].
  • (99980) 1981 ER18's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.1681752708759419'}[12].
  • (99980) 1981 ER18's absolute magnitude is recorded as {'unit': '1', 'amount': '+15.41'}[13].
  • (99980) 1981 ER18's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+5.05779383912927'}[14].
  • (99980) 1981 ER18's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+1494.793011684297'}[15].
  • (99980) 1981 ER18's rotation period is recorded as {'unit': 'http://www.wikidata.org/entity/Q25235', 'amount': '+2.35'}[16].
  • (99980) 1981 ER18's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+344.5813823618335'}[17].
  • (99980) 1981 ER18's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.558517673460409'}[18].
  • (99980) 1981 ER18's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.988797076235498'}[19].
  • (99980) 1981 ER18's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.12823827068532'}[20].
  • (99980) 1981 ER18's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+130.1241801947062'}[21].
  • (99980) 1981 ER18's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+13.60724759572915'}[22].
  • (99980) 1981 ER18's Google Knowledge Graph ID is recorded as /g/11c2nhntl8[23].
  • (99980) 1981 ER18's Wolfram Language entity code is recorded as Entity["MinorPlanet", "MinorPlanet99980Provisional1981ER18"][24].
  • (99980) 1981 ER18's Minor Planet Center body ID is recorded as 99980[25].
  • (99980) 1981 ER18's epoch is recorded as November 21, 2025[26].

Body

Designation and Status

(99980) 1981 ER18'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 . wikidata.org.
  11. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] ↑ . 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). (99980) 1981 ER18. Retrieved May 3, 2026, from https://4ort.xyz/entity/-99980-1981-er18
MLA “(99980) 1981 ER18.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/-99980-1981-er18.
BibTeX @misc{4ortxyz_-99980-1981-er18_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(99980) 1981 ER18}}, year = {2026}, url = {https://4ort.xyz/entity/-99980-1981-er18}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (99980) 1981 ER18 — https://4ort.xyz/entity/-99980-1981-er18 (retrieved 2026-05-03)

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