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K2-18c

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K2-18c

Summary

K2-18c is an exoplanet[1].

Key Facts

  • K2-18c's instance of is recorded as exoplanet[2].
  • K2-18c's constellation is recorded as Leo[3].
  • K2-18c's parent astronomical body is recorded as K2-18[4].
  • K2-18c's catalog code is recorded as K2-18c[5].
  • K2-18c's catalog code is recorded as EPIC 201912552c[6].
  • K2-18c's catalog code is recorded as TIC 388804061c[7].
  • K2-18c's time of discovery or invention is recorded as +2017-12-00T00:00:00Z[8].
  • K2-18c's discovery method is recorded as Doppler spectroscopy[9].
  • K2-18c's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.47'}[10].
  • K2-18c's M sin i is recorded as {'unit': 'http://www.wikidata.org/entity/Q681996', 'amount': '+7.51'}[11].
  • K2-18c's mass is recorded as {'unit': 'http://www.wikidata.org/entity/Q651336', 'amount': '+0.02363'}[12].
  • K2-18c's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+8.962'}[13].
  • K2-18c's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+26.2686'}[14].
  • K2-18c's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+0.06'}[15].
  • K2-18c's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+172.56049010379877'}[16].
  • K2-18c's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+7.58840478072944'}[17].
  • K2-18c's epoch is recorded as J2000.0[18].
  • K2-18c's declination component of proper motion is recorded as {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-133.142'}[19].
  • K2-18c's right ascension component of proper motion is recorded as {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-80.377'}[20].

Body

Definition and Type

K2-18c's instance of is recorded as exoplanet[2].

References

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

Direct Wikidata claims

  1. [2] ↑ . SIMBAD. wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  4. [5] ↑ . Exoplanet Archive. wikidata.org.
  5. [6] ↑ . Exoplanet Archive. wikidata.org.
  6. [7] ↑ . Exoplanet Archive. wikidata.org.
  7. [8] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  8. [9] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  9. [10] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  10. [11] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  11. [12] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  12. [13] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  13. [14] ↑ . Gaia Data Release 2. wikidata.org.
  14. [15] ↑ . Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit. wikidata.org.
  15. [16] ↑ . Gaia Data Release 2. wikidata.org.
  16. [17] ↑ . Gaia Data Release 2. wikidata.org.
  17. [18] ↑ . SIMBAD. wikidata.org.
  18. [19] ↑ . Gaia Data Release 2. wikidata.org.
  19. [20] ↑ . Gaia Data Release 2. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

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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). K2-18c. Retrieved May 7, 2026, from https://4ort.xyz/entity/k2-18c
MLA “K2-18c.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/k2-18c.
BibTeX @misc{4ortxyz_k2-18c_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{K2-18c}}, year = {2026}, url = {https://4ort.xyz/entity/k2-18c}, note = {Accessed: 2026-05-07}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): K2-18c — https://4ort.xyz/entity/k2-18c (retrieved 2026-05-07)

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