117P/Helin–Roman–Alu

comet
Thing periodic_comet Q598143
Press Enter · cited answer in seconds

117P/Helin–Roman–Alu

Summary

117P/Helin–Roman–Alu is a periodic comet[1]. 117P/Helin–Roman–Alu draws 2 Wikipedia views per month (periodic_comet category, ranking #32 of 183).[2]

Key Facts

  • 117P/Helin–Roman–Alu is credited with the discovery of Eleanor F. Helin[3].
  • 117P/Helin–Roman–Alu is credited with the discovery of Brian P. Roman[4].
  • 117P/Helin–Roman–Alu is credited with the discovery of Jeff T. Alu[5].
  • 117P/Helin–Roman–Alu's image is recorded as 117P 2022-06-04 image ZTF-sso-235-zr-fov-7.0arcmin.png[6].
  • 117P/Helin–Roman–Alu's instance of is recorded as periodic comet[7].
  • 117P/Helin–Roman–Alu's instance of is recorded as Jupiter-family comet[8].
  • 117P/Helin–Roman–Alu's parent astronomical body is recorded as Sun[9].
  • 117P/Helin–Roman–Alu's provisional designation is recorded as 117P/1989 T2[10].
  • 117P/Helin–Roman–Alu's provisional designation is recorded as 1989w[11].
  • 117P/Helin–Roman–Alu's provisional designation is recorded as 1987 XXXVII[12].
  • 117P/Helin–Roman–Alu's time of discovery or invention is recorded as +1989-10-02T00:00:00Z[13].
  • 117P/Helin–Roman–Alu's Freebase ID is recorded as /m/0bd8rq[14].
  • 117P/Helin–Roman–Alu's JPL Small-Body Database SPK-ID is recorded as 1000121[15].
  • 117P/Helin–Roman–Alu's orbital eccentricity is recorded as {'amount': '+0.254895139264299'}[16].
  • 117P/Helin–Roman–Alu's absolute magnitude is recorded as {'amount': '+6.5'}[17].
  • 117P/Helin–Roman–Alu's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+8.701678647180362'}[18].
  • 117P/Helin–Roman–Alu's orbital period is recorded as {'unit': 'Q573', 'amount': '+3023.178041710537'}[19].
  • 117P/Helin–Roman–Alu's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+58.87624800929279'}[20].
  • 117P/Helin–Roman–Alu's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+4.091760432883025'}[21].
  • 117P/Helin–Roman–Alu's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+5.134730278258893'}[22].
  • 117P/Helin–Roman–Alu's periapsis is recorded as {'unit': 'Q1811', 'amount': '+3.048790587507158'}[23].
  • 117P/Helin–Roman–Alu's argument of periapsis is recorded as {'unit': 'Q28390', 'amount': '+222.4967520097974'}[24].
  • 117P/Helin–Roman–Alu's mean anomaly is recorded as {'unit': 'Q28390', 'amount': '+171.4076559572368'}[25].
  • 117P/Helin–Roman–Alu's diameter is recorded as {'unit': 'Q828224', 'amount': '+9.0'}[26].
  • 117P/Helin–Roman–Alu's NAIF ID is recorded as 1000121[27].

Body

Works and Contributions

Credited discoveries include Eleanor F. Helin[3], an astronomer[28], 1932–2009[29], of United States[30], awarded the Women in Technology Hall of Fame[31], specialised in astronomy[32]; Brian P. Roman[4], an astronomer[33], b. 2000[34], of United States[35], specialised in astronomy[36]; and Jeff T. Alu[5], an astronomer[37], b. 1966[38], of United States[39], specialised in astronomy[40].

Why It Matters

117P/Helin–Roman–Alu draws 2 Wikipedia views per month (periodic_comet category, ranking #32 of 183).[2] 117P/Helin–Roman–Alu has Wikipedia articles in 6 language editions, a strong signal of global cultural recognition.[41]

References

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

Direct Wikidata claims

  1. [6] . wikidata.org.
  2. [7] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [8] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  4. [3] . wikidata.org.
  5. [4] . wikidata.org.
  6. [5] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [11] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] . Freebase Data Dumps. wikidata.org.
  13. [15] . JPL Small-Body Database. Retrieved . 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] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [23] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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.
  24. [26] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  25. [27] . naif.jpl.nasa.gov. naif.jpl.nasa.gov. Provenance: wikidata.org.

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site
  8. [35] . Wikidata. wikidata.org. → on this site
  9. [36] . Wikidata. wikidata.org. → on this site
  10. [37] . Wikidata. wikidata.org. → on this site
  11. [38] . Wikidata. wikidata.org. → on this site
  12. [39] . Wikidata. wikidata.org. → on this site
  13. [40] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [41] . 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). 117P/Helin–Roman–Alu. Retrieved May 3, 2026, from https://4ort.xyz/entity/117p-helin-roman-alu
MLA “117P/Helin–Roman–Alu.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/117p-helin-roman-alu.
BibTeX @misc{4ortxyz_117p-helin-roman-alu_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{117P/Helin–Roman–Alu}}, year = {2026}, url = {https://4ort.xyz/entity/117p-helin-roman-alu}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 117P/Helin–Roman–Alu — https://4ort.xyz/entity/117p-helin-roman-alu (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/117p-helin-roman-alu · Last refreshed: