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(488474) 1999 HD1

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(488474) 1999 HD1

Summary

(488474) 1999 HD1 is an asteroid[1].

Key Facts

  • (488474) 1999 HD1 is credited with the discovery of Spacewatch[2].
  • (488474) 1999 HD1's instance of is recorded as asteroid[3].
  • (488474) 1999 HD1's instance of is recorded as near-Earth object[4].
  • (488474) 1999 HD1's site of astronomical discovery is recorded as Kitt Peak National Observatory[5].
  • (488474) 1999 HD1's minor planet group is recorded as Apollo asteroid[6].
  • (488474) 1999 HD1's parent astronomical body is recorded as Sun[7].
  • (488474) 1999 HD1's provisional designation is recorded as 1999 HD1[8].
  • (488474) 1999 HD1's time of discovery or invention is recorded as +1999-04-16T00:00:00Z[9].
  • (488474) 1999 HD1's JPL Small-Body Database SPK-ID is recorded as 20488474[10].
  • (488474) 1999 HD1's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.4179325221070008'}[11].
  • (488474) 1999 HD1's absolute magnitude is recorded as {'unit': '1', 'amount': '+20.32'}[12].
  • (488474) 1999 HD1's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+18.21487925133851'}[13].
  • (488474) 1999 HD1's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+439.8308366843507'}[14].
  • (488474) 1999 HD1's longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+209.8523006386102'}[15].
  • (488474) 1999 HD1's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+1.131856836857335'}[16].
  • (488474) 1999 HD1's apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+1.604896619349173'}[17].
  • (488474) 1999 HD1's periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+0.658817054365497'}[18].
  • (488474) 1999 HD1's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+147.9833930952286'}[19].
  • (488474) 1999 HD1's mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+121.6434867047157'}[20].
  • (488474) 1999 HD1's Google Knowledge Graph ID is recorded as /g/12z65xy4x[21].
  • (488474) 1999 HD1's Minor Planet Center body ID is recorded as 488474[22].
  • (488474) 1999 HD1's epoch is recorded as May 5, 2025[23].
  • (488474) 1999 HD1's time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2460651.881787404'}[24].

Body

Designation and Status

Recorded instance of include asteroid[3] and near-Earth object[4].

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. [4] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [2] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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 . 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] ↑ . wikidata.org.
  21. [22] ↑ . wikidata.org.
  22. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [24] ↑ . 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). (488474) 1999 HD1. Retrieved May 3, 2026, from https://4ort.xyz/entity/-488474-1999-hd1
MLA “(488474) 1999 HD1.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/-488474-1999-hd1.
BibTeX @misc{4ortxyz_-488474-1999-hd1_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{(488474) 1999 HD1}}, year = {2026}, url = {https://4ort.xyz/entity/-488474-1999-hd1}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): (488474) 1999 HD1 — https://4ort.xyz/entity/-488474-1999-hd1 (retrieved 2026-05-03)

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