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(20494) 1999 PM1

asteroid
Place asteroid Q4828213
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(20494) 1999 PM1

Summary

(20494) 1999 PM1 is an asteroid[1]. (20494) 1999 PM1 has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • (20494) 1999 PM1 is credited with the discovery of Robert H. McNaught[3].
  • (20494) 1999 PM1's instance of is recorded as asteroid[4].
  • (20494) 1999 PM1's site of astronomical discovery is recorded as Siding Spring Observatory[5].
  • (20494) 1999 PM1 followed (20493) 1999 OD5[6].
  • (20494) 1999 PM1 was followed by 20495 Rimavská Sobota[7].
  • (20494) 1999 PM1's minor planet group is recorded as asteroid belt[8].
  • (20494) 1999 PM1's parent astronomical body is recorded as Sun[9].
  • (20494) 1999 PM1's provisional designation is recorded as 1999 PM1[10].
  • (20494) 1999 PM1's time of discovery or invention is recorded as August 3, 1999[11].
  • (20494) 1999 PM1's orbital eccentricity is recorded as {'amount': '+0.24'}[12].
  • (20494) 1999 PM1's orbital eccentricity is recorded as {'amount': '+0.2423663'}[13].
  • (20494) 1999 PM1's orbital eccentricity is recorded as {'amount': '+0.2415285464512499'}[14].
  • (20494) 1999 PM1's absolute magnitude is recorded as {'amount': '+14.0'}[15].
  • (20494) 1999 PM1's absolute magnitude is recorded as {'amount': '+14.04'}[16].
  • (20494) 1999 PM1's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+28.14170'}[17].
  • (20494) 1999 PM1's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+28.12644033535115'}[18].
  • (20494) 1999 PM1's orbital period is recorded as {'unit': 'Q577', 'amount': '+4.39'}[19].
  • (20494) 1999 PM1's orbital period is recorded as {'unit': 'Q573', 'amount': '+1606.639453106181'}[20].
  • (20494) 1999 PM1's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+95.67758'}[21].
  • (20494) 1999 PM1's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+95.63672982527865'}[22].
  • (20494) 1999 PM1's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.6826791'}[23].
  • (20494) 1999 PM1's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+2.684602562330507'}[24].
  • (20494) 1999 PM1's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3.333'}[25].
  • (20494) 1999 PM1's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3.333010717009494'}[26].
  • (20494) 1999 PM1's periapsis is recorded as {'unit': 'Q1811', 'amount': '+2.0324881'}[27].

Body

Designation and Status

(20494) 1999 PM1's instance of is recorded as asteroid[4].

Why It Matters

(20494) 1999 PM1 has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[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] ↑ . wikidata.org.
  11. [13] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  12. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [15] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  14. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [17] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  16. [18] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [19] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  18. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [21] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  20. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [23] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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 sitelinks. 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). (20494) 1999 PM1. Retrieved May 3, 2026, from https://4ort.xyz/entity/20494-1999-pm1
MLA “(20494) 1999 PM1.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/20494-1999-pm1.
BibTeX @misc{4ortxyz_20494-1999-pm1_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(20494) 1999 PM1}}, year = {2026}, url = {https://4ort.xyz/entity/20494-1999-pm1}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (20494) 1999 PM1 — https://4ort.xyz/entity/20494-1999-pm1 (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/20494-1999-pm1 · Last refreshed:

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. 22d ago · Peter James · 2026-05-15 view diff on Wikidata ↗
    Instance of → asteroid
    Epoch → November 21, 2025
    Orbital period → {'unit': 'Q577', 'amount': '+4.39'}, {'unit': 'Q573', 'amount': '+1606.639453106181'}
    Argument of periapsis → {'unit': 'Q28390', 'amount': '+258.65436'}, {'unit': 'Q28390', 'amount': '+258.5158039047094'}
    + 21 other properties edited (see Wikidata diff for full list)
    "/* wbmergeitems-from:0||Q139802050 */ #quickstatements; #temporary_batch_1778879174762"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.