Sigma Hydrae

star in the constellation Hydra
Place star Q1028837
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Sigma Hydrae

Summary

Sigma Hydrae is a star[1]. It ranks in the top 5% of star entities by monthly Wikipedia readership (13 views/month).[2]

Key Facts

  • Sigma Hydrae's instance of is recorded as star[3].
  • Sigma Hydrae's instance of is recorded as near-infrared source[4].
  • Sigma Hydrae's instance of is recorded as ultraviolet source[5].
  • Sigma Hydrae's constellation is recorded as Hydra[6].
  • Sigma Hydrae's spectral class is recorded as K2III[7].
  • Sigma Hydrae's catalog code is recorded as GSC 00215-02022[8].
  • Sigma Hydrae's catalog code is recorded as 2MASS J08384544+0320293[9].
  • Sigma Hydrae's catalog code is recorded as SAO 116988[10].
  • Sigma Hydrae's catalog code is recorded as HD 73471[11].
  • Sigma Hydrae's catalog code is recorded as HIP 42402[12].
  • Sigma Hydrae's catalog code is recorded as HR 3418[13].
  • Sigma Hydrae's catalog code is recorded as IRAS 08361+0331[14].
  • Sigma Hydrae's catalog code is recorded as σ Hya[15].
  • Sigma Hydrae's catalog code is recorded as PLX 2059[16].
  • Sigma Hydrae's catalog code is recorded as BD+03 2026[17].
  • Sigma Hydrae's catalog code is recorded as FK5 1224[18].
  • Sigma Hydrae's catalog code is recorded as GC 11856[19].
  • Sigma Hydrae's catalog code is recorded as GCRV 5683[20].
  • Sigma Hydrae's catalog code is recorded as HIC 42402[21].
  • Sigma Hydrae's catalog code is recorded as IRC +00176[22].
  • Sigma Hydrae's catalog code is recorded as JP11 1694[23].
  • Sigma Hydrae's catalog code is recorded as N30 2012[24].
  • Sigma Hydrae's catalog code is recorded as PMC 90-93 834[25].
  • Sigma Hydrae's catalog code is recorded as PPM 154796[26].
  • Sigma Hydrae's catalog code is recorded as RAFGL 1276[27].

Body

Designation and Status

Recorded instance of include star[3], near-infrared source[4], and ultraviolet source[5].

History and Context

Catalog codes include GSC 00215-02022[8], 2MASS J08384544+0320293[9], SAO 116988[10], HD 73471[11], HIP 42402[12], and HR 3418[13].

Why It Matters

Sigma Hydrae ranks in the top 5% of star entities by monthly Wikipedia readership (13 views/month).[2] It has Wikipedia articles in 13 language editions, a strong signal of global cultural recognition.[28] It is known by 21 alternative names across languages and contexts.[29]

References

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

Direct Wikidata claims

  1. [3] . SIMBAD. wikidata.org.
  2. [4] . SIMBAD. wikidata.org.
  3. [5] . SIMBAD. wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . Space-velocity vectors for 3483 stars with proper motion and radial velocity. wikidata.org.
  6. [8] . SIMBAD. wikidata.org.
  7. [9] . SIMBAD. wikidata.org.
  8. [10] . SIMBAD. wikidata.org.
  9. [11] . SIMBAD. wikidata.org.
  10. [12] . SIMBAD. wikidata.org.
  11. [13] . SIMBAD. wikidata.org.
  12. [14] . SIMBAD. wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . SIMBAD. wikidata.org.
  15. [17] . SIMBAD. wikidata.org.
  16. [18] . SIMBAD. wikidata.org.
  17. [19] . SIMBAD. wikidata.org.
  18. [20] . SIMBAD. wikidata.org.
  19. [21] . SIMBAD. wikidata.org.
  20. [22] . SIMBAD. wikidata.org.
  21. [23] . SIMBAD. wikidata.org.
  22. [24] . SIMBAD. wikidata.org.
  23. [25] . SIMBAD. wikidata.org.
  24. [26] . SIMBAD. 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.
  3. [29] . Wikidata aliases. 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). Sigma Hydrae. Retrieved May 3, 2026, from https://4ort.xyz/entity/sigma-hydrae
MLA “Sigma Hydrae.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/sigma-hydrae.
BibTeX @misc{4ortxyz_sigma-hydrae_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Sigma Hydrae}}, year = {2026}, url = {https://4ort.xyz/entity/sigma-hydrae}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Sigma Hydrae — https://4ort.xyz/entity/sigma-hydrae (retrieved 2026-05-03)

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