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Gliese 229 Ac

exoplanet in the constellation Lepus
Place exoplanet Q81822929

Facts

19 properties
Instance of
exoplanet
Argument of periapsis
128.617 degree[15]
Catalog code
GJ 229 c, HD 42581c, TIC 124279525c[4][5][6]
Constellation
Lepus[2]
Declination
-21.8677233 degree[17]
Declination component of proper motion
-719.088 milliarcsecond per year[19]
Discovery method
Doppler spectroscopy[8]
Epoch
J2000.0[18]
Imported from
wholeness_audit_2026-05-02
M sin i
0.027 Jupiter mass[10]
Mass
0.02495 Jupiter mass[11]
Orbital eccentricity
0.366[9]
Orbital period
121.93268 day[12]
Parallax
173.6955 milliarcsecond[13]
Parent astronomical body
Gliese 229 A[3]
Right ascension
92.6435993 degree[16]
Right ascension component of proper motion
-135.985 milliarcsecond per year[20]
Semi-major axis of an orbit
0.384 astronomical unit[14]
Time of discovery or invention
January 2020[7]
🏷️ Also known as
en GJ 229 Ac en Gliese 229 Ac en HD 42581 Ac en TIC 124279525c ja グリーゼ229Ac nl GJ 229 A c nl HD 42581c
🔖 Identifiers · 4
Extrasolar Planets Encyclopaedia exoplanet ID
gj_229_d--7263
Google Knowledge Graph ID
/g/11j50h41dd
NASA Exoplanet Archive ID
GJ 229 A c
SIMBAD ID
HD 42581c

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Summary

Gliese 229 Ac is an exoplanet[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . SIMBAD. wikidata.org.
  3. [4] ↑ . SIMBAD. wikidata.org.
  4. [5] ↑ . SIMBAD. wikidata.org.
  5. [6] ↑ . Exoplanet Archive. wikidata.org.
  6. [7] ↑ . Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs. wikidata.org.
  7. [8] ↑ . Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs. wikidata.org.
  8. [9] ↑ . 3-D selection of 167 sub-stellar companions to nearby stars. wikidata.org.
  9. [10] ↑ . 3-D selection of 167 sub-stellar companions to nearby stars. wikidata.org.
  10. [11] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  11. [12] ↑ . 3-D selection of 167 sub-stellar companions to nearby stars. wikidata.org.
  12. [13] ↑ . Gaia Data Release 2. wikidata.org.
  13. [14] ↑ . 3-D selection of 167 sub-stellar companions to nearby stars. wikidata.org.
  14. [15] ↑ . 3-D selection of 167 sub-stellar companions to nearby stars. wikidata.org.
  15. [16] ↑ . Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs. wikidata.org.
  16. [17] ↑ . Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs. 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.

📑 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). Gliese 229 Ac. Retrieved November 3, 2026, from https://4ort.xyz/entity/gliese-229-ac
MLA “Gliese 229 Ac.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Nov. 2026, https://4ort.xyz/entity/gliese-229-ac.
BibTeX @misc{4ortxyz_gliese-229-ac_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Gliese 229 Ac}}, year = {2026}, url = {https://4ort.xyz/entity/gliese-229-ac}, note = {Accessed: 2026-11-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Gliese 229 Ac — https://4ort.xyz/entity/gliese-229-ac (retrieved 2026-11-03)

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