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C/2021 A1 (Leonard)

hyperbolic comet
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C/2021 A1 (Leonard)

Summary

C/2021 A1 (Leonard) is a non-periodic comet[1]. C/2021 A1 (Leonard) draws 20 Wikipedia views per month (non_periodic_comet category, ranking #21 of 92).[2]

Key Facts

  • C/2021 A1 (Leonard) is credited with the discovery of Gregory J. Leonard[3].
  • C/2021 A1 (Leonard)'s image is recorded as Comet 2021 A1 (Leonard).jpg[4].
  • C/2021 A1 (Leonard)'s instance of is recorded as non-periodic comet[5].
  • C/2021 A1 (Leonard)'s instance of is recorded as hyperbolic comet[6].
  • C/2021 A1 (Leonard)'s site of astronomical discovery is recorded as Mount Lemmon Observatory[7].
  • C/2021 A1 (Leonard)'s Commons category is recorded as C/2021 A1 (Leonard)[8].
  • C/2021 A1 (Leonard)'s parent astronomical body is recorded as Sun[9].
  • C/2021 A1 (Leonard)'s time of discovery or invention is recorded as +2021-01-03T00:00:00Z[10].
  • C/2021 A1 (Leonard)'s JPL Small-Body Database SPK-ID is recorded as 1003751[11].
  • C/2021 A1 (Leonard)'s orbital eccentricity is recorded as {'amount': '+1.000100480224943'}[12].
  • C/2021 A1 (Leonard)'s absolute magnitude is recorded as {'amount': '+12.5'}[13].
  • C/2021 A1 (Leonard)'s orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+132.6858129092049'}[14].
  • C/2021 A1 (Leonard)'s orbital period is recorded as {'unit': 'Q577', 'amount': '+80000'}[15].
  • C/2021 A1 (Leonard)'s longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+255.889103218281'}[16].
  • C/2021 A1 (Leonard)'s semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '-6122.898277484996'}[17].
  • C/2021 A1 (Leonard)'s apoapsis is recorded as {'unit': 'Q1811', 'amount': '+3700'}[18].
  • C/2021 A1 (Leonard)'s periapsis is recorded as {'unit': 'Q1811', 'amount': '+0.6152301962242579'}[19].
  • C/2021 A1 (Leonard)'s argument of periapsis is recorded as {'unit': 'Q28390', 'amount': '+225.087712614859'}[20].
  • C/2021 A1 (Leonard)'s mean anomaly is recorded as {'unit': 'Q28390', 'amount': '-0.0003626626127893133'}[21].
  • C/2021 A1 (Leonard)'s Google Knowledge Graph ID is recorded as /g/11qqxlpnc_[22].
  • C/2021 A1 (Leonard)'s Minor Planet Center body ID is recorded as C/2021 A1[23].
  • C/2021 A1 (Leonard)'s epoch is recorded as July 11, 2021[24].
  • C/2021 A1 (Leonard)'s time of periapsis is recorded as {'unit': 'Q14267', 'amount': '+2459582.792677952009'}[25].

Body

Works and Contributions

C/2021 A1 (Leonard) is credited with the discovery of Gregory J. Leonard[3].

Why It Matters

C/2021 A1 (Leonard) draws 20 Wikipedia views per month (non_periodic_comet category, ranking #21 of 92).[2] C/2021 A1 (Leonard) has Wikipedia articles in 15 language editions, a strong signal of global cultural recognition.[26]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [6] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [3] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . JPL Small-Body Database. Retrieved . wikidata.org.
  10. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [25] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [26] ↑ . Wikidata sitelinks. 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/2021 A1 (Leonard). Retrieved May 3, 2026, from https://4ort.xyz/entity/c-2021-a1-leonard
MLA “C/2021 A1 (Leonard).” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/c-2021-a1-leonard.
BibTeX @misc{4ortxyz_c-2021-a1-leonard_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{C/2021 A1 (Leonard)}}, year = {2026}, url = {https://4ort.xyz/entity/c-2021-a1-leonard}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): C/2021 A1 (Leonard) — https://4ort.xyz/entity/c-2021-a1-leonard (retrieved 2026-05-03)

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