121P/Shoemaker-Holt

comet
Thing periodic_comet Q3498380
121P/Shoemaker-Holt
NASA/CALTECH/IRSA/Spitzer · Public Domain · Wikimedia

Facts

18 properties
Absolute magnitude
6.0[13]
Apoapsis
5.391873496687183[18]
Argument of periapsis
7.391217241062686[20]
Diameter
3.24[22]
Longitude of ascending node
99.09927639087128[16]
Mean anomaly
96.76248090532613[21]
Orbital eccentricity
0.3406038298142783[12]
Orbital inclination
17.82702553259715[14]
Orbital period
2946.166484590266[15]
Parent astronomical body
Sun[6]
Periapsis
2.652074128666313[19]
Provisional designation
121P/1995 Q3, 121P/1989 E2, 1989j, 1988 XI[7][8][9][10]
Semi-major axis of an orbit
4.021973812676748[17]
Time of discovery or invention
March 9, 1989[11]
Time of periapsis
2453253.615616086
🏷️ Also known as
en 121P/Shoemaker-Holt cs 121P/Shoemaker-Holt 2 en-gb 121P/Shoemaker–Holt es 121P Shoemaker-Holt ru 121P/Шумейкеров — Хольта
🔖 Identifiers · 3
Freebase ID
/m/0bdfcm
JPL Small-Body Database SPK-ID
1000141
Minor Planet Center body ID
121P

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🔗 Connections
Discoverer or inventor 3
Instance of 2
Epoch 1
Parent astronomical body 1
Sun
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Summary

121P/Shoemaker-Holt is a periodic comet[1].

Body

Works and Contributions

Credited discoveries include Henry E. Holt[2], an astronomer[23], 1929–2019[24], of United States[25], specialised in astronomy[26]; Carolyn S. Shoemaker[3], an astronomer[27], 1929–2021[28], of United States[29], awarded the NASA Exceptional Scientific Achievement Medal[30], specialised in astronomy[31]; and Eugene Merle Shoemaker[4], an astronomer[32], 1928–1997[33], of United States[34], awarded the Arthur L. Day Medal[35], specialised in geology[36].

References

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

Direct Wikidata claims

  1. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [2] ↑ . wikidata.org.
  3. [3] ↑ . wikidata.org.
  4. [4] ↑ . wikidata.org.
  5. [6] ↑ . 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] ↑ . 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] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

Inline context (facts about related entities)

  1. [23] ↑ . Wikidata. wikidata.org. → on this site
  2. [24] ↑ . Wikidata. wikidata.org. → on this site
  3. [25] ↑ . Wikidata. wikidata.org. → on this site
  4. [26] ↑ . Wikidata. wikidata.org. → on this site
  5. [27] ↑ . Wikidata. wikidata.org. → on this site
  6. [28] ↑ . Wikidata. wikidata.org. → on this site
  7. [29] ↑ . Wikidata. wikidata.org. → on this site
  8. [30] ↑ . Wikidata. wikidata.org. → on this site
  9. [31] ↑ . Wikidata. wikidata.org. → on this site
  10. [32] ↑ . Wikidata. wikidata.org. → on this site
  11. [33] ↑ . Wikidata. wikidata.org. → on this site
  12. [34] ↑ . Wikidata. wikidata.org. → on this site
  13. [35] ↑ . Wikidata. wikidata.org. → on this site
  14. [36] ↑ . Wikidata. wikidata.org. → on this site

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). 121P/Shoemaker-Holt. Retrieved November 3, 2026, from https://4ort.xyz/entity/121p-shoemaker-holt
MLA “121P/Shoemaker-Holt.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Nov. 2026, https://4ort.xyz/entity/121p-shoemaker-holt.
BibTeX @misc{4ortxyz_121p-shoemaker-holt_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{121P/Shoemaker-Holt}}, year = {2026}, url = {https://4ort.xyz/entity/121p-shoemaker-holt}, note = {Accessed: 2026-11-03}}
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