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DD Hydrae

RR Lyrae variable star in the constellation Hydra
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DD Hydrae

Summary

DD Hydrae is a RR Lyrae variable[1].

Key Facts

  • DD Hydrae's instance of is recorded as RR Lyrae variable[2].
  • DD Hydrae's instance of is recorded as near-infrared source[3].
  • DD Hydrae's constellation is recorded as Hydra[4].
  • DD Hydrae's spectral class is recorded as Av[5].
  • DD Hydrae's catalog code is recorded as ASAS J081232+0250.1[6].
  • DD Hydrae's catalog code is recorded as GSC 00199-01667[7].
  • DD Hydrae's catalog code is recorded as HIC 40186[8].
  • DD Hydrae's catalog code is recorded as HIP 40186[9].
  • DD Hydrae's catalog code is recorded as 2MASS J08123180+0250050[10].
  • DD Hydrae's catalog code is recorded as Gaia DR2 3090871397797047296[11].
  • DD Hydrae's catalog code is recorded as DD Hya[12].
  • DD Hydrae's catalog code is recorded as Gaia DR3 3090871397797047296[13].
  • DD Hydrae's catalog code is recorded as TIC 453024910[14].
  • DD Hydrae's catalog code is recorded as TYC 199-1667-1[15].
  • DD Hydrae's catalog code is recorded as WISEA J081231.81+025004.9[16].
  • DD Hydrae's type of variable star is recorded as RR Lyrae variable with asymmetric light curves[17].
  • DD Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+11.676'}[18].
  • DD Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+11.390'}[19].
  • DD Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+11.355'}[20].
  • DD Hydrae's apparent magnitude is recorded as {'unit': '1', 'amount': '+12.344071'}[21].
  • DD Hydrae's parallax is recorded as {'unit': 'http://www.wikidata.org/entity/Q21500224', 'amount': '+0.4899'}[22].
  • DD Hydrae's radial velocity is recorded as {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+156.00'}[23].
  • DD Hydrae's metallicity is recorded as {'unit': '1', 'amount': '-0.97'}[24].
  • DD Hydrae's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+1710.1178'}[25].
  • DD Hydrae's SIMBAD ID is recorded as V* DD Hya[26].

Body

Designation and Status

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

History and Context

Catalog codes include ASAS J081232+0250.1[6], GSC 00199-01667[7], HIC 40186[8], HIP 40186[9], 2MASS J08123180+0250050[10], and Gaia DR2 3090871397797047296[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] ↑ . wikidata.org.
  4. [5] ↑ . SIMBAD. 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] ↑ . SIMBAD. wikidata.org.
  12. [13] ↑ . SIMBAD. wikidata.org.
  13. [14] ↑ . SIMBAD. wikidata.org.
  14. [15] ↑ . SIMBAD. wikidata.org.
  15. [16] ↑ . Gaia Data Release 3. wikidata.org.
  16. [17] ↑ . Mid-infrared period-luminosity relations of RR Lyrae stars derived from the AllWISE Data Release. wikidata.org.
  17. [18] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  18. [19] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  19. [20] ↑ . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). wikidata.org.
  20. [21] ↑ . Gaia Early Data Release 3. wikidata.org.
  21. [22] ↑ . Gaia Early Data Release 3. wikidata.org.
  22. [23] ↑ . Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system. wikidata.org.
  23. [24] ↑ . The luminosities and distance scales of type II Cepheid and RR Lyrae variables. wikidata.org.
  24. [25] ↑ . Gaia Data Release 3. wikidata.org.
  25. [26] ↑ . 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). DD Hydrae. Retrieved May 3, 2026, from https://4ort.xyz/entity/dd-hydrae
MLA “DD Hydrae.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/dd-hydrae.
BibTeX @misc{4ortxyz_dd-hydrae_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{DD Hydrae}}, year = {2026}, url = {https://4ort.xyz/entity/dd-hydrae}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): DD Hydrae — https://4ort.xyz/entity/dd-hydrae (retrieved 2026-05-03)

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