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(53421) 1999 RY18

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(53421) 1999 RY18

Summary

(53421) 1999 RY18 is an asteroid[1].

Key Facts

  • (53421) 1999 RY18 is credited with the discovery of Lincoln Near-Earth Asteroid Research[2].
  • (53421) 1999 RY18's instance of is recorded as asteroid[3].
  • (53421) 1999 RY18's site of astronomical discovery is recorded as Experimental Test Site[4].
  • (53421) 1999 RY18's follows is recorded as (53420) 1999 RH4[5].
  • (53421) 1999 RY18's followed by is recorded as (53422) 1999 RN30[6].
  • (53421) 1999 RY18's minor planet group is recorded as inner asteroid belt[7].
  • (53421) 1999 RY18's parent astronomical body is recorded as Sun[8].
  • (53421) 1999 RY18's provisional designation is recorded as 1999 RY18[9].
  • (53421) 1999 RY18's provisional designation is recorded as 1991 SU1[10].
  • (53421) 1999 RY18's time of discovery or invention is recorded as +1999-09-07T00:00:00Z[11].
  • (53421) 1999 RY18's JPL Small-Body Database SPK-ID is recorded as 20053421[12].
  • (53421) 1999 RY18's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.08468903747178093'}[13].
  • (53421) 1999 RY18's absolute magnitude is recorded as {'unit': '1', 'amount': '+15.87'}[14].
  • (53421) 1999 RY18's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+19.46826896231624'}[15].
  • (53421) 1999 RY18's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+973.3890012801038'}[16].
  • (53421) 1999 RY18's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+349.5103296421731'}[17].
  • (53421) 1999 RY18's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+1.922170931303155'}[18].
  • (53421) 1999 RY18's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.084957737331457'}[19].
  • (53421) 1999 RY18's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+1.759384125274854'}[20].
  • (53421) 1999 RY18's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+333.5694484884815'}[21].
  • (53421) 1999 RY18's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+321.1699202505021'}[22].
  • (53421) 1999 RY18's Minor Planet Center body ID is recorded as 53421[23].
  • (53421) 1999 RY18's epoch is recorded as November 21, 2025[24].
  • (53421) 1999 RY18's time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2461105.491034853'}[25].

Body

Designation and Status

(53421) 1999 RY18'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 . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [12] ↑ . JPL Small-Body Database. Retrieved . 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] ↑ . 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). (53421) 1999 RY18. Retrieved May 3, 2026, from https://4ort.xyz/entity/-53421-1999-ry18
MLA “(53421) 1999 RY18.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/-53421-1999-ry18.
BibTeX @misc{4ortxyz_-53421-1999-ry18_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(53421) 1999 RY18}}, year = {2026}, url = {https://4ort.xyz/entity/-53421-1999-ry18}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (53421) 1999 RY18 — https://4ort.xyz/entity/-53421-1999-ry18 (retrieved 2026-05-03)

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