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(45050) 1999 XW21

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Summary

(45050) 1999 XW21 is an asteroid[1].

Key Facts

  • (45050) 1999 XW21 is credited with the discovery of Lincoln Near-Earth Asteroid Research[2].
  • (45050) 1999 XW21's instance of is recorded as asteroid[3].
  • (45050) 1999 XW21's site of astronomical discovery is recorded as Experimental Test Site[4].
  • (45050) 1999 XW21's follows is recorded as (45049) 1999 XL21[5].
  • (45050) 1999 XW21's followed by is recorded as (45051) 1999 XP22[6].
  • (45050) 1999 XW21's minor planet group is recorded as asteroid belt[7].
  • (45050) 1999 XW21's parent astronomical body is recorded as Sun[8].
  • (45050) 1999 XW21's provisional designation is recorded as 1999 XW21[9].
  • (45050) 1999 XW21's time of discovery or invention is recorded as +1999-12-05T00:00:00Z[10].
  • (45050) 1999 XW21's JPL Small-Body Database SPK-ID is recorded as 20045050[11].
  • (45050) 1999 XW21's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.1190151128205195'}[12].
  • (45050) 1999 XW21's absolute magnitude is recorded as {'unit': '1', 'amount': '+13.99'}[13].
  • (45050) 1999 XW21's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+12.01726458760591'}[14].
  • (45050) 1999 XW21's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+1559.434758556221'}[15].
  • (45050) 1999 XW21's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+282.7059909640052'}[16].
  • (45050) 1999 XW21's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.631757416385066'}[17].
  • (45050) 1999 XW21's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.944976322212374'}[18].
  • (45050) 1999 XW21's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.318538510557759'}[19].
  • (45050) 1999 XW21's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+299.2997159079989'}[20].
  • (45050) 1999 XW21's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+164.6022515327841'}[21].
  • (45050) 1999 XW21's Wolfram Language entity code is recorded as Entity["MinorPlanet", "MinorPlanet45050Provisional1999XW21"][22].
  • (45050) 1999 XW21's Minor Planet Center body ID is recorded as 45050[23].
  • (45050) 1999 XW21's epoch is recorded as March 31, 2024[24].
  • (45050) 1999 XW21's time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2459687.4820211753'}[25].

Body

Designation and Status

(45050) 1999 XW21'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] ↑ . wikidata.org.
  22. [23] ↑ . wikidata.org.
  23. [24] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  24. [25] ↑ . 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). (45050) 1999 XW21. Retrieved May 3, 2026, from https://4ort.xyz/entity/-45050-1999-xw21
MLA “(45050) 1999 XW21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/-45050-1999-xw21.
BibTeX @misc{4ortxyz_-45050-1999-xw21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(45050) 1999 XW21}}, year = {2026}, url = {https://4ort.xyz/entity/-45050-1999-xw21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (45050) 1999 XW21 — https://4ort.xyz/entity/-45050-1999-xw21 (retrieved 2026-05-03)

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