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(55740) 1989 YL2

minor planet
Place asteroid Q4543900
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Summary

(55740) 1989 YL2 is an asteroid[1].

Key Facts

  • Discoverer or inventor: Robert H. McNaught[2]
  • Site of astronomical discovery: Siding Spring Observatory[3]
  • Follows: (55739) 1989 TV[4]
  • Followed by: (55741) 1990 QZ3[5]
  • Minor planet group: asteroid belt[6], outer asteroid belt[7]
  • Parent astronomical body: Sun[8]
  • Provisional designation: 1989 YL2[9], 1990 BY2[10], 2001 UQ135[11]
  • Time of discovery or invention: December 30, 1989[12]
  • Orbital eccentricity: {'amount': '+0.1725995579349663'}[13]
  • Absolute magnitude: {'amount': '+13.94'}[14]
  • Orbital inclination: 6.1436378484021 degree[15]
  • Orbital period: 2321.17644546669 day[16]
  • Longitude of ascending node: 127.4918873874617 degree[17]
  • Semi-major axis of an orbit: 3.430887560744572 astronomical unit[18]
  • Apoapsis: 4.023057237053661 astronomical unit[19]
  • Periapsis: 2.838717884435484 astronomical unit[20]
  • Argument of periapsis: 316.0411910822862 degree[21]
  • Mean anomaly: 252.591271336183 degree[22]
  • Diameter: 8.555 km[23]

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] ↑ . 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 . 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.
  21. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [23] ↑ . 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). (55740) 1989 YL2. Retrieved October 26, 2026, from https://4ort.xyz/entity/55740-1989-yl2
MLA “(55740) 1989 YL2.” 4ort.xyz Knowledge Graph, 4ort.xyz, 26 Oct. 2026, https://4ort.xyz/entity/55740-1989-yl2.
BibTeX @misc{4ortxyz_55740-1989-yl2_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(55740) 1989 YL2}}, year = {2026}, url = {https://4ort.xyz/entity/55740-1989-yl2}, note = {Accessed: 2026-10-26}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (55740) 1989 YL2 — https://4ort.xyz/entity/55740-1989-yl2 (retrieved 2026-10-26)

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