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C/1984 A1 (Bradfield 1)

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Summary

C/1984 A1 (Bradfield 1) is a Halley-type comet[1].

Key Facts

  • C/1984 A1 (Bradfield 1) is credited with the discovery of William A. Bradfield[2].
  • C/1984 A1 (Bradfield 1)'s instance of is recorded as Halley-type comet[3].
  • C/1984 A1 (Bradfield 1)'s parent astronomical body is recorded as Sun[4].
  • C/1984 A1 (Bradfield 1)'s provisional designation is recorded as C/1984 A1[5].
  • C/1984 A1 (Bradfield 1)'s provisional designation is recorded as 1984a[6].
  • C/1984 A1 (Bradfield 1)'s time of discovery or invention is recorded as +1984-01-07T00:00:00Z[7].
  • C/1984 A1 (Bradfield 1)'s JPL Small-Body Database SPK-ID is recorded as 1000007[8].
  • C/1984 A1 (Bradfield 1)'s orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.9523151691976423'}[9].
  • C/1984 A1 (Bradfield 1)'s orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+51.80056575868125'}[10].
  • C/1984 A1 (Bradfield 1)'s orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+55479.59139602257'}[11].
  • C/1984 A1 (Bradfield 1)'s longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+356.8583433871945'}[12].
  • C/1984 A1 (Bradfield 1)'s semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+28.46797339795019'}[13].
  • C/1984 A1 (Bradfield 1)'s apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+55.57845630113309'}[14].
  • C/1984 A1 (Bradfield 1)'s periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+1.357490494767276'}[15].
  • C/1984 A1 (Bradfield 1)'s argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+219.1648629554008'}[16].
  • C/1984 A1 (Bradfield 1)'s mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+0.3841634981293849'}[17].
  • C/1984 A1 (Bradfield 1)'s Google Knowledge Graph ID is recorded as /g/121qftp2[18].
  • C/1984 A1 (Bradfield 1)'s NAIF ID is recorded as 1000007[19].
  • C/1984 A1 (Bradfield 1)'s epoch is recorded as February 25, 1984[20].
  • C/1984 A1 (Bradfield 1)'s time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2445696.2965724845'}[21].

Body

Works and Contributions

C/1984 A1 (Bradfield 1) is credited with the discovery of William A. Bradfield[2].

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] ↑ . wikidata.org.
  3. [4] ↑ . 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 . 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] ↑ . wikidata.org.
  18. [19] ↑ . naif.jpl.nasa.gov. naif.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.

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). C/1984 A1 (Bradfield 1). Retrieved October 16, 2026, from https://4ort.xyz/entity/c-1984-a1-bradfield-1-
MLA “C/1984 A1 (Bradfield 1).” 4ort.xyz Knowledge Graph, 4ort.xyz, 16 Oct. 2026, https://4ort.xyz/entity/c-1984-a1-bradfield-1-.
BibTeX @misc{4ortxyz_c-1984-a1-bradfield-1-_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{C/1984 A1 (Bradfield 1)}}, year = {2026}, url = {https://4ort.xyz/entity/c-1984-a1-bradfield-1-}, note = {Accessed: 2026-10-16}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): C/1984 A1 (Bradfield 1) — https://4ort.xyz/entity/c-1984-a1-bradfield-1- (retrieved 2026-10-16)

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