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(99982) 1981 EJ21

asteroid
Place asteroid Q28518453

Facts

24 properties
Instance of
asteroid
Follows
(99981) 1981 EF20[4]
Followed by
(99983) 1981 EF22[5]
Absolute magnitude
14.28[11]
Albedo
0.049[21]
Apoapsis
4.619051273741867 astronomical unit[16]
Argument of periapsis
14.68160518026455 degree[18]
Diameter
9.515 km[20]
Discoverer or inventor
Schelte J. Bus[2]
Epoch
November 21, 2025
Imported from
wholeness_audit_2026-05-02
Longitude of ascending node
165.1973231686174 degree[14]
Mean anomaly
241.996404956076 degree[19]
Minor planet group
outer asteroid belt[6]
Orbital eccentricity
0.1679443318256879[10]
Orbital inclination
9.668758002992828 degree[12]
Orbital period
2,872.727200985371 day[13]
Parent astronomical body
Sun[7]
Periapsis
3.290660084712238 astronomical unit[17]
Provisional designation
1981 EJ21[8]
Semi-major axis of an orbit
3.954855679227053 astronomical unit[15]
Site of astronomical discovery
Siding Spring Observatory[3]
Time of discovery or invention
March 2, 1981[9]
Time of periapsis
2,461,942.144825824 Julian day
🏷️ Also known as
en (99982) 1981 EJ21
🔖 Identifiers · 4
Google Knowledge Graph ID
/g/11ddwz7c3r
JPL Small-Body Database SPK-ID
20099982
Minor Planet Center body ID
99982
Wolfram Language entity code
Entity["MinorPlanet", "MinorPlanet99982Provisional1981EJ21"]

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Summary

(99982) 1981 EJ21 is an asteroid[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [3] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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 . 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.

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). (99982) 1981 EJ21. Retrieved November 3, 2026, from https://4ort.xyz/entity/-99982-1981-ej21
MLA “(99982) 1981 EJ21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Nov. 2026, https://4ort.xyz/entity/-99982-1981-ej21.
BibTeX @misc{4ortxyz_-99982-1981-ej21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(99982) 1981 EJ21}}, year = {2026}, url = {https://4ort.xyz/entity/-99982-1981-ej21}, note = {Accessed: 2026-11-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (99982) 1981 EJ21 — https://4ort.xyz/entity/-99982-1981-ej21 (retrieved 2026-11-03)

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