139P/Väisälä–Oterma

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Thing periodic_comet Q2454615
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139P/Väisälä–Oterma

Summary

139P/Väisälä–Oterma is a periodic comet[1]. 139P/Väisälä–Oterma draws 2 Wikipedia views per month (periodic_comet category, ranking #32 of 183).[2]

Key Facts

  • 139P/Väisälä–Oterma is credited with the discovery of Yrjö Väisälä[3].
  • 139P/Väisälä–Oterma is credited with the discovery of Liisi Oterma[4].
  • 139P/Väisälä–Oterma's instance of is recorded as periodic comet[5].
  • 139P/Väisälä–Oterma's instance of is recorded as Jupiter-family comet[6].
  • 139P/Väisälä–Oterma's parent astronomical body is recorded as Sun[7].
  • 139P/Väisälä–Oterma's provisional designation is recorded as 139P/1998 WG22[8].
  • 139P/Väisälä–Oterma's provisional designation is recorded as 139P/1939 TN[9].
  • 139P/Väisälä–Oterma's time of discovery or invention is recorded as +1939-10-07T00:00:00Z[10].
  • 139P/Väisälä–Oterma's Freebase ID is recorded as /m/0bk2yw[11].
  • 139P/Väisälä–Oterma's JPL Small-Body Database SPK-ID is recorded as 1000238[12].
  • 139P/Väisälä–Oterma's orbital eccentricity is recorded as {'amount': '+0.2475258895835873'}[13].
  • 139P/Väisälä–Oterma's absolute magnitude is recorded as {'amount': '+7.2'}[14].
  • 139P/Väisälä–Oterma's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+2.328730212472332'}[15].
  • 139P/Väisälä–Oterma's orbital period is recorded as {'unit': 'Q573', 'amount': '+3512.682716197136'}[16].
  • 139P/Väisälä–Oterma's longitude of ascending node is recorded as {'unit': 'Q28390', 'amount': '+242.3775854441777'}[17].
  • 139P/Väisälä–Oterma's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+4.522310018781327'}[18].
  • 139P/Väisälä–Oterma's apoapsis is recorded as {'unit': 'Q1811', 'amount': '+5.641698829152944'}[19].
  • 139P/Väisälä–Oterma's periapsis is recorded as {'unit': 'Q1811', 'amount': '+3.40292120840971'}[20].
  • 139P/Väisälä–Oterma's argument of periapsis is recorded as {'unit': 'Q28390', 'amount': '+165.7253966892989'}[21].
  • 139P/Väisälä–Oterma's mean anomaly is recorded as {'unit': 'Q28390', 'amount': '+96.29128772402149'}[22].
  • 139P/Väisälä–Oterma's epoch is recorded as November 16, 2010[23].
  • 139P/Väisälä–Oterma's time of periapsis is recorded as {'unit': 'Q14267', 'amount': '+2454576.942383032'}[24].

Body

Works and Contributions

Credited discoveries include Yrjö Väisälä[3], an astronomer[25], 1891–1971[26], of Finland[27], awarded the Cross of Liberty, 2nd Class[28] and Liisi Oterma[4], an astronomer[29], 1915–2001[30], of Finland[31], awarded the Knight First Class of the Order of the White Rose of Finland[32], specialised in astronomy[33].

Why It Matters

139P/Väisälä–Oterma draws 2 Wikipedia views per month (periodic_comet category, ranking #32 of 183).[2] 139P/Väisälä–Oterma has Wikipedia articles in 6 language editions, a strong signal of global cultural recognition.[34]

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. [6] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [3] . wikidata.org.
  4. [4] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  7. [9] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . Freebase Data Dumps. wikidata.org.
  10. [12] . JPL Small-Body Database. Retrieved . 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] . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: 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.

Inline context (facts about related entities)

  1. [25] . Wikidata. wikidata.org. → on this site
  2. [26] . Wikidata. wikidata.org. → on this site
  3. [27] . Wikidata. wikidata.org. → on this site
  4. [28] . Wikidata. wikidata.org. → on this site
  5. [29] . Wikidata. wikidata.org. → on this site
  6. [30] . Wikidata. wikidata.org. → on this site
  7. [31] . Wikidata. wikidata.org. → on this site
  8. [32] . Wikidata. wikidata.org. → on this site
  9. [33] . 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. [34] . 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). 139P/Väisälä–Oterma. Retrieved May 3, 2026, from https://4ort.xyz/entity/139p-v-is-l-oterma
MLA “139P/Väisälä–Oterma.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/139p-v-is-l-oterma.
BibTeX @misc{4ortxyz_139p-v-is-l-oterma_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{139P/Väisälä–Oterma}}, year = {2026}, url = {https://4ort.xyz/entity/139p-v-is-l-oterma}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 139P/Väisälä–Oterma — https://4ort.xyz/entity/139p-v-is-l-oterma (retrieved 2026-05-03)

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