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C/2021 D1 (SWAN)

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C/2021 D1 (SWAN)

Summary

C/2021 D1 (SWAN) is a non-periodic comet[1].

Key Facts

  • C/2021 D1 (SWAN)'s image is recorded as C2021D1 (SWAN) 2021-04-03 image ZTF-sso-653-zr-size-6.4arcmin.png[2].
  • C/2021 D1 (SWAN)'s instance of is recorded as non-periodic comet[3].
  • C/2021 D1 (SWAN)'s time of discovery or invention is recorded as +2021-02-28T00:00:00Z[4].
  • C/2021 D1 (SWAN)'s JPL Small-Body Database SPK-ID is recorded as 1003769[5].
  • C/2021 D1 (SWAN)'s orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.9906488283356564'}[6].
  • C/2021 D1 (SWAN)'s absolute magnitude is recorded as {'unit': '1', 'amount': '+13.3'}[7].
  • C/2021 D1 (SWAN)'s orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+31.46078130442246'}[8].
  • C/2021 D1 (SWAN)'s orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+345909.8822799273'}[9].
  • C/2021 D1 (SWAN)'s longitude of ascending node is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+311.2712216541829'}[10].
  • C/2021 D1 (SWAN)'s semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+96.43685271696992'}[11].
  • C/2021 D1 (SWAN)'s apoapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+191.9719078694144'}[12].
  • C/2021 D1 (SWAN)'s periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+0.9017975645254088'}[13].
  • C/2021 D1 (SWAN)'s argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+72.2229618807321'}[14].
  • C/2021 D1 (SWAN)'s mean anomaly is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+0.02018100797480953'}[15].
  • C/2021 D1 (SWAN)'s Google Knowledge Graph ID is recorded as /g/11pr4q1mhs[16].
  • C/2021 D1 (SWAN)'s epoch is recorded as March 19, 2021[17].
  • C/2021 D1 (SWAN)'s time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2459273.108860853'}[18].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . JPL Small-Body Database. Retrieved . wikidata.org.
  5. [6] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] ↑ . 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.

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/2021 D1 (SWAN). Retrieved October 5, 2026, from https://4ort.xyz/entity/c-2021-d1-swan-
MLA “C/2021 D1 (SWAN).” 4ort.xyz Knowledge Graph, 4ort.xyz, 5 Oct. 2026, https://4ort.xyz/entity/c-2021-d1-swan-.
BibTeX @misc{4ortxyz_c-2021-d1-swan-_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{C/2021 D1 (SWAN)}}, year = {2026}, url = {https://4ort.xyz/entity/c-2021-d1-swan-}, note = {Accessed: 2026-10-05}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): C/2021 D1 (SWAN) — https://4ort.xyz/entity/c-2021-d1-swan- (retrieved 2026-10-05)

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