EF Hydrae

RR Lyrae variable star in the constellation Hydra
Place rr_lyrae_variable Q86337360
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EF Hydrae

Summary

EF Hydrae is a RR Lyrae variable[1].

Key Facts

  • EF Hydrae's instance of is recorded as RR Lyrae variable[2].
  • EF Hydrae's instance of is recorded as near-infrared source[3].
  • EF Hydrae's instance of is recorded as variable star[4].
  • EF Hydrae's constellation is recorded as Hydra[5].
  • EF Hydrae's catalog code is recorded as 2MASS J12022763-3526463[6].
  • EF Hydrae's catalog code is recorded as CRTS J120227.7-352646[7].
  • EF Hydrae's catalog code is recorded as Gaia DR2 3462535705561799552[8].
  • EF Hydrae's catalog code is recorded as EF Hya[9].
  • EF Hydrae's catalog code is recorded as Gaia DR3 3462535705561799552[10].
  • EF Hydrae's catalog code is recorded as TIC 142265281[11].
  • EF Hydrae's catalog code is recorded as WISEA J120227.63-352646.3[12].
  • EF Hydrae's type of variable star is recorded as RR Lyrae variable with asymmetric light curves[13].
  • EF Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+14.04'}[14].
  • EF Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+14.15'}[15].
  • EF Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+13.89'}[16].
  • EF Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+13.81'}[17].
  • EF Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.21'}[18].
  • EF Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+15.202004'}[19].
  • EF Hydrae's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+0.1314'}[20].
  • EF Hydrae's metallicity is recorded as {'unit': '1', 'amount': '-1.55'}[21].
  • EF Hydrae's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+2961.2795'}[22].
  • EF Hydrae's SIMBAD ID is recorded as V* EF Hya[23].
  • EF Hydrae's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+180.61512470306997'}[24].
  • EF Hydrae's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '-35.44621523995'}[25].
  • EF Hydrae's epoch is recorded as J2000.0[26].

Body

Designation and Status

Recorded instance of include RR Lyrae variable[2], near-infrared source[3], and variable star[4].

History and Context

Catalog codes include 2MASS J12022763-3526463[6], CRTS J120227.7-352646[7], Gaia DR2 3462535705561799552[8], EF Hya[9], Gaia DR3 3462535705561799552[10], and TIC 142265281[11].

References

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

Direct Wikidata claims

  1. [2] . SIMBAD. wikidata.org.
  2. [3] . SIMBAD. wikidata.org.
  3. [4] . SIMBAD. wikidata.org.
  4. [5] . wikidata.org.
  5. [6] . SIMBAD. wikidata.org.
  6. [7] . SIMBAD. wikidata.org.
  7. [8] . SIMBAD. wikidata.org.
  8. [9] . SIMBAD. wikidata.org.
  9. [10] . SIMBAD. wikidata.org.
  10. [11] . SIMBAD. wikidata.org.
  11. [12] . Gaia Data Release 3. wikidata.org.
  12. [13] . Gaia Data Release 2. wikidata.org.
  13. [14] . The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed between 2004 and 2007. wikidata.org.
  14. [15] . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  15. [16] . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  16. [17] . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  17. [18] . Discovery of ~9,000 new RR Lyrae in the southern Catalina surveys. wikidata.org.
  18. [19] . Gaia Early Data Release 3. wikidata.org.
  19. [20] . Gaia Early Data Release 3. wikidata.org.
  20. [21] . On the Use of Field RR Lyrae as Galactic Probes. III. The α-element Abundances. wikidata.org.
  21. [22] . Gaia Data Release 3. wikidata.org.
  22. [23] . wikidata.org.
  23. [24] . Gaia Early Data Release 3. wikidata.org.
  24. [25] . Gaia Early Data Release 3. wikidata.org.
  25. [26] . 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). EF Hydrae. Retrieved May 3, 2026, from https://4ort.xyz/entity/ef-hydrae
MLA “EF Hydrae.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/ef-hydrae.
BibTeX @misc{4ortxyz_ef-hydrae_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{EF Hydrae}}, year = {2026}, url = {https://4ort.xyz/entity/ef-hydrae}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): EF Hydrae — https://4ort.xyz/entity/ef-hydrae (retrieved 2026-05-03)

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