K2-138b

exoplanet
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K2-138b

Summary

K2-138b is an exoplanet[1]. K2-138b draws 8 Wikipedia views per month (exoplanet category, ranking #89 of 578).[2]

Key Facts

  • K2-138b is credited with the discovery of Kepler Space Telescope[3].
  • K2-138b's instance of is recorded as exoplanet[4].
  • K2-138b's constellation is recorded as Aquarius[5].
  • K2-138b's parent astronomical body is recorded as Q47471235[6].
  • K2-138b's catalog code is recorded as K2-138b[7].
  • K2-138b's catalog code is recorded as EPIC 245950175b[8].
  • K2-138b's catalog code is recorded as TIC 4610830b[9].
  • K2-138b's time of discovery or invention is recorded as +2017-00-00T00:00:00Z[10].
  • K2-138b's time of discovery or invention is recorded as +2018-02-00T00:00:00Z[11].
  • K2-138b's discovery method is recorded as transit method[12].
  • K2-138b's orbital eccentricity is recorded as {'amount': '+0.403'}[13].
  • K2-138b's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+87.72'}[14].
  • K2-138b's mass is recorded as {'unit': 'Q681996', 'amount': '+3.1'}[15].
  • K2-138b's radius is recorded as {'unit': 'Q1155470', 'amount': '+1.49'}[16].
  • K2-138b's orbital period is recorded as {'unit': 'Q573', 'amount': '+2.35321'}[17].
  • K2-138b's parallax is recorded as {'unit': 'Q21500224', 'amount': '+4.9079'}[18].
  • K2-138b's semi-major axis of an orbit is recorded as {'unit': 'Q1811', 'amount': '+0.0338'}[19].
  • K2-138b's argument of periapsis is recorded as {'unit': 'Q28390', 'amount': '+244'}[20].
  • K2-138b's Google Knowledge Graph ID is recorded as /g/11f54sgtq7[21].
  • K2-138b's SIMBAD ID is recorded as K2-138b[22].
  • K2-138b's Extrasolar Planets Encyclopaedia exoplanet ID is recorded as k2_138_b--6701[23].
  • K2-138b's NASA Exoplanet Archive ID is recorded as K2-138 b[24].
  • K2-138b's right ascension is recorded as {'unit': 'Q28390', 'amount': '+348.94903556226210'}[25].
  • K2-138b's declination is recorded as {'unit': 'Q28390', 'amount': '-10.84969380744611'}[26].
  • K2-138b's epoch is recorded as J2000.0[27].

Body

Designation and Status

K2-138b's instance of is recorded as exoplanet[4].

History and Context

Catalog codes include K2-138b[7], EPIC 245950175b[8], and TIC 4610830b[9].

Why It Matters

K2-138b draws 8 Wikipedia views per month (exoplanet category, ranking #89 of 578).[2] K2-138b has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[28]

References

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

Direct Wikidata claims

  1. [4] . SIMBAD. wikidata.org.
  2. [5] . wikidata.org.
  3. [3] . wikidata.org.
  4. [6] . The K2-138 System: A Near-resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists. wikidata.org.
  5. [7] . Exoplanet Archive. wikidata.org.
  6. [8] . Exoplanet Archive. wikidata.org.
  7. [9] . Exoplanet Archive. wikidata.org.
  8. [10] . Extrasolar Planets Encyclopaedia. wikidata.org.
  9. [11] . The K2-138 System: A Near-resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists. wikidata.org.
  10. [12] . The K2-138 System: A Near-resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists. wikidata.org.
  11. [13] . Exoplanet characterisation in the longest known resonant chain: the K2-138 system seen by HARPS. wikidata.org.
  12. [14] . K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System. wikidata.org.
  13. [15] . Exoplanet characterisation in the longest known resonant chain: the K2-138 system seen by HARPS. wikidata.org.
  14. [16] . K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System. wikidata.org.
  15. [17] . K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System. wikidata.org.
  16. [18] . Gaia Data Release 2. wikidata.org.
  17. [19] . K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System. wikidata.org.
  18. [20] . Exoplanet characterisation in the longest known resonant chain: the K2-138 system seen by HARPS. wikidata.org.
  19. [21] . wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . wikidata.org.
  23. [25] . Gaia Data Release 2. wikidata.org.
  24. [26] . Gaia Data Release 2. wikidata.org.
  25. [27] . SIMBAD. wikidata.org.

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] . 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). K2-138b. Retrieved May 3, 2026, from https://4ort.xyz/entity/k2-138b
MLA “K2-138b.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/k2-138b.
BibTeX @misc{4ortxyz_k2-138b_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{K2-138b}}, year = {2026}, url = {https://4ort.xyz/entity/k2-138b}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): K2-138b — https://4ort.xyz/entity/k2-138b (retrieved 2026-05-03)

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