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(20439) 1999 JM28

asteroid
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(20439) 1999 JM28

Summary

(20439) 1999 JM28 is an asteroid[1]. (20439) 1999 JM28 is known by 4 alternative names across languages and contexts.[2]

Key Facts

  • (20439) 1999 JM28 is credited with the discovery of Lincoln Near-Earth Asteroid Research[3].
  • (20439) 1999 JM28's instance of is recorded as asteroid[4].
  • (20439) 1999 JM28's site of astronomical discovery is recorded as Experimental Test Site[5].
  • (20439) 1999 JM28 followed (20438) 1999 JP22[6].
  • (20439) 1999 JM28 was followed by 20440 McClintock[7].
  • (20439) 1999 JM28's minor planet group is recorded as asteroid belt[8].
  • (20439) 1999 JM28's parent astronomical body is recorded as Sun[9].
  • (20439) 1999 JM28's provisional designation is recorded as 1971 YD[10].
  • (20439) 1999 JM28's provisional designation is recorded as 1978 SU1[11].
  • (20439) 1999 JM28's provisional designation is recorded as 1993 TW[12].
  • (20439) 1999 JM28's provisional designation is recorded as 1999 JM28[13].
  • (20439) 1999 JM28's time of discovery or invention is recorded as May 10, 1999[14].
  • (20439) 1999 JM28's orbital eccentricity is recorded as {'amount': '+0.19'}[15].
  • (20439) 1999 JM28's orbital eccentricity is recorded as {'amount': '+0.1926127'}[16].
  • (20439) 1999 JM28's orbital eccentricity is recorded as {'amount': '+0.1933537892287572'}[17].
  • (20439) 1999 JM28's absolute magnitude is recorded as {'amount': '+14.1'}[18].
  • (20439) 1999 JM28's absolute magnitude is recorded as {'amount': '+14.19'}[19].
  • (20439) 1999 JM28's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+1.38945'}[20].
  • (20439) 1999 JM28's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+1.391765514490678'}[21].
  • (20439) 1999 JM28's orbital period is recorded as {'unit': 'Q577', 'amount': '+3.72'}[22].
  • (20439) 1999 JM28's orbital period is recorded as {'unit': 'Q573', 'amount': '+1358.892645056575'}[23].
  • (20439) 1999 JM28's rotation period is recorded as {'unit': 'Q25235', 'amount': '+9.09'}[24].
  • (20439) 1999 JM28's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+238.85344'}[25].
  • (20439) 1999 JM28's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+238.8014036477912'}[26].
  • (20439) 1999 JM28's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.4020495'}[27].

Body

Designation and Status

(20439) 1999 JM28's instance of is recorded as asteroid[4].

Why It Matters

(20439) 1999 JM28 is known by 4 alternative names across languages and contexts.[2]

References

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

Direct Wikidata claims

  1. [4] ↑ . 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. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [11] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  15. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  17. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  19. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  21. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [24] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [25] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  24. [26] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  25. [27] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata aliases. 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). (20439) 1999 JM28. Retrieved May 3, 2026, from https://4ort.xyz/entity/20439-1999-jm28
MLA “(20439) 1999 JM28.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/20439-1999-jm28.
BibTeX @misc{4ortxyz_20439-1999-jm28_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(20439) 1999 JM28}}, year = {2026}, url = {https://4ort.xyz/entity/20439-1999-jm28}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (20439) 1999 JM28 — https://4ort.xyz/entity/20439-1999-jm28 (retrieved 2026-05-03)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 9d ago · Circeus · 2026-08-16 view diff on Wikidata ↗
    Argument of periapsis → {'unit': 'Q28390', 'amount': '+185.64705'}, {'unit': 'Q28390', 'amount': '+185.5549437380846'}
    Followed by → 20440 McClintock
    Mean anomaly → {'unit': 'Q28390', 'amount': '+175.97560'}, {'unit': 'Q28390', 'amount': '+198.1034680216669'}
    Follows → —
    + 22 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ [[Property:P14387]]: [[Q5]], Copying from [[Q18016447]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.