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(21857) 1999 TJ154

asteroid
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Summary

(21857) 1999 TJ154 is an asteroid[1].

Key Facts

  • Discoverer or inventor: Lincoln Near-Earth Asteroid Research[2]
  • Site of astronomical discovery: Experimental Test Site[3]
  • Follows: 21856 Heathermaria[4]
  • Followed by: 21858 Gosal[5]
  • Minor planet group: asteroid belt[6]
  • Parent astronomical body: Sun[7]
  • Provisional designation: 1994 TA7[8], 1999 TJ154[9]
  • Time of discovery or invention: October 7, 1999[10]
  • Orbital eccentricity: 0.07[11], 0.0692502[12], 0.07350899054047971[13]
  • Absolute magnitude: 13.9[14], 14.05[15]
  • Orbital inclination: 2.45621 degree[16], 2.457859669232775 degree[17]
  • Orbital period: 4.82 years[18], 1757.096718671184 day[19]
  • Longitude of ascending node: 152.85547 degree[20], 152.7009316881198 degree[21]
  • Semi-major axis of an orbit: 2.8522767 astronomical unit[22], 2.849693557552517 astronomical unit[23]
  • Apoapsis: 3.050 astronomical unit[24]

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] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] ↑ . wikidata.org.
  11. [12] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  12. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [14] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  14. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [16] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  16. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [18] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  18. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [20] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  20. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [22] ↑ . minorplanetcenter.net. minorplanetcenter.net. Provenance: wikidata.org.
  22. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [24] ↑ . minorplanetcenter.net. minorplanetcenter.net. 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). (21857) 1999 TJ154. Retrieved October 26, 2026, from https://4ort.xyz/entity/-21857-1999-tj154
MLA “(21857) 1999 TJ154.” 4ort.xyz Knowledge Graph, 4ort.xyz, 26 Oct. 2026, https://4ort.xyz/entity/-21857-1999-tj154.
BibTeX @misc{4ortxyz_-21857-1999-tj154_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(21857) 1999 TJ154}}, year = {2026}, url = {https://4ort.xyz/entity/-21857-1999-tj154}, note = {Accessed: 2026-10-26}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (21857) 1999 TJ154 — https://4ort.xyz/entity/-21857-1999-tj154 (retrieved 2026-10-26)

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