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C/1980 Y1 (Bradfield)

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Summary

C/1980 Y1 (Bradfield) is a non-periodic comet[1].

Key Facts

  • C/1980 Y1 (Bradfield) is credited with the discovery of William A. Bradfield[2].
  • C/1980 Y1 (Bradfield)'s instance of is recorded as non-periodic comet[3].
  • C/1980 Y1 (Bradfield)'s parent astronomical body is recorded as Sun[4].
  • C/1980 Y1 (Bradfield)'s time of discovery or invention is recorded as +1980-12-17T00:00:00Z[5].
  • C/1980 Y1 (Bradfield)'s JPL Small-Body Database SPK-ID is recorded as 1001186[6].
  • C/1980 Y1 (Bradfield)'s orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.9997253771673678'}[7].
  • C/1980 Y1 (Bradfield)'s orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+138.5851793695298'}[8].
  • C/1980 Y1 (Bradfield)'s orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+10629455.5828991'}[9].
  • C/1980 Y1 (Bradfield)'s longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+115.3515432889278'}[10].
  • C/1980 Y1 (Bradfield)'s semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+946.1102111516037'}[11].
  • C/1980 Y1 (Bradfield)'s apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+1891.960598837039'}[12].
  • C/1980 Y1 (Bradfield)'s periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+0.259823466168743'}[13].
  • C/1980 Y1 (Bradfield)'s argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+358.2941224507322'}[14].
  • C/1980 Y1 (Bradfield)'s mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+0.0009299632086489559'}[15].
  • C/1980 Y1 (Bradfield)'s Google Knowledge Graph ID is recorded as /g/121bdcry[16].
  • C/1980 Y1 (Bradfield)'s Google Knowledge Graph ID is recorded as /g/1q5jq4h3v[17].
  • C/1980 Y1 (Bradfield)'s epoch is recorded as January 26, 1981[18].
  • C/1980 Y1 (Bradfield)'s time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2444603.0416593887'}[19].

Body

Works and Contributions

C/1980 Y1 (Bradfield) 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] ↑ . wikidata.org.
  5. [6] ↑ . JPL Small-Body Database. Retrieved . wikidata.org.
  6. [7] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] ↑ . 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] ↑ . wikidata.org.
  16. [17] ↑ . 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.

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/1980 Y1 (Bradfield). Retrieved October 10, 2026, from https://4ort.xyz/entity/c-1980-y1-bradfield-
MLA “C/1980 Y1 (Bradfield).” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Oct. 2026, https://4ort.xyz/entity/c-1980-y1-bradfield-.
BibTeX @misc{4ortxyz_c-1980-y1-bradfield-_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{C/1980 Y1 (Bradfield)}}, year = {2026}, url = {https://4ort.xyz/entity/c-1980-y1-bradfield-}, note = {Accessed: 2026-10-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): C/1980 Y1 (Bradfield) — https://4ort.xyz/entity/c-1980-y1-bradfield- (retrieved 2026-10-10)

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