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(74828) 1999 TB21

asteroid
Place asteroid Q15187762
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(74828) 1999 TB21

Summary

(74828) 1999 TB21 is an asteroid[1].

Key Facts

  • (74828) 1999 TB21 is credited with the discovery of Roy A. Tucker[2].
  • (74828) 1999 TB21's instance of is recorded as asteroid[3].
  • (74828) 1999 TB21's site of astronomical discovery is recorded as Goodricke-Pigott Observatory[4].
  • (74828) 1999 TB21 followed (74827) 1999 TW17[5].
  • (74828) 1999 TB21 was followed by (74829) 1999 TR21[6].
  • (74828) 1999 TB21's minor planet group is recorded as asteroid belt[7].
  • (74828) 1999 TB21's parent astronomical body is recorded as Sun[8].
  • (74828) 1999 TB21's provisional designation is recorded as 1999 TB21[9].
  • (74828) 1999 TB21's provisional designation is recorded as 1997 EN25[10].
  • (74828) 1999 TB21's time of discovery or invention is recorded as October 7, 1999[11].
  • (74828) 1999 TB21's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.1286075687687162'}[12].
  • (74828) 1999 TB21's absolute magnitude is recorded as {'unit': '1', 'amount': '+16.09'}[13].
  • (74828) 1999 TB21's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+3.667812227233369'}[14].
  • (74828) 1999 TB21's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+1280.336706754115'}[15].
  • (74828) 1999 TB21's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+354.4016541709061'}[16].
  • (74828) 1999 TB21's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.307546775556988'}[17].
  • (74828) 1999 TB21's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.604314756181463'}[18].
  • (74828) 1999 TB21's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.010778794932513'}[19].
  • (74828) 1999 TB21's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+102.3524592023787'}[20].
  • (74828) 1999 TB21's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+351.4968425132289'}[21].
  • (74828) 1999 TB21's epoch is recorded as October 17, 2024[22].
  • (74828) 1999 TB21's time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2460630.741401816'}[23].

Body

Designation and Status

(74828) 1999 TB21'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 . 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). (74828) 1999 TB21. Retrieved May 3, 2026, from https://4ort.xyz/entity/-74828-1999-tb21
MLA “(74828) 1999 TB21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/-74828-1999-tb21.
BibTeX @misc{4ortxyz_-74828-1999-tb21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(74828) 1999 TB21}}, year = {2026}, url = {https://4ort.xyz/entity/-74828-1999-tb21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (74828) 1999 TB21 — https://4ort.xyz/entity/-74828-1999-tb21 (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/-74828-1999-tb21 · 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. 14d ago · LiMrBot bot · 2026-05-25 view diff on Wikidata ↗
    Discoverer or inventor → Roy A. Tucker
    Apoapsis → {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '
    Orbital inclination → {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount':
    Time of discovery or invention → +1999-10-07T00:00:00Z
    + 21 other properties edited (see Wikidata diff for full list)
    "/* wbremoveclaims-remove:1| */ [[Property:P1457]]: 16.09"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.