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NGC 6819

open cluster in the constellation Cygnus
Thing open_cluster Q652216
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NGC 6819

Summary

NGC 6819 is an open cluster[1]. It has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • NGC 6819 is credited with the discovery of Caroline Herschel[3].
  • NGC 6819's image is recorded as NGC 6819 – An Open Cluster in the Constellation Cygnus.jpg[4].
  • NGC 6819's instance of is recorded as open cluster[5].
  • NGC 6819's constellation is recorded as Cygnus[6].
  • NGC 6819's Commons category is recorded as NGC 6819[7].
  • NGC 6819's catalog code is recorded as NGC 6819[8].
  • NGC 6819's catalog code is recorded as OCL 155[9].
  • NGC 6819's catalog code is recorded as C 1939+400[10].
  • NGC 6819's catalog code is recorded as [KPS2012] MWSC 3155[11].
  • NGC 6819's catalog code is recorded as Collinder 403[12].
  • NGC 6819's catalog code is recorded as Melotte 223[13].
  • NGC 6819's time of discovery or invention is recorded as +1784-05-12T00:00:00Z[14].
  • NGC 6819's Freebase ID is recorded as /m/04n2zmc[15].
  • NGC 6819's topic's main category is recorded as Category:NGC 6819[16].
  • NGC 6819's apparent magnitude is recorded as {'unit': '1', 'amount': '+8.21'}[17].
  • NGC 6819's apparent magnitude is recorded as {'unit': '1', 'amount': '+7.3'}[18].
  • NGC 6819's radial velocity is recorded as {'unit': 'http://www.wikidata.org/entity/Q3674704', 'amount': '+4.8'}[19].
  • NGC 6819's metallicity is recorded as {'unit': '1', 'amount': '+0.09'}[20].
  • NGC 6819's distance from Earth is recorded as {'unit': 'http://www.wikidata.org/entity/Q12129', 'amount': '+2403'}[21].
  • NGC 6819's SIMBAD ID is recorded as NGC 6819[22].
  • NGC 6819's New General Catalogue ID is recorded as 6819[23].
  • NGC 6819's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+295.3250'}[24].
  • NGC 6819's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+40.1867'}[25].
  • NGC 6819's epoch is recorded as J2000.0[26].
  • NGC 6819's declination component of proper motion is recorded as {'unit': 'http://www.wikidata.org/entity/Q22137107', 'amount': '-3.57'}[27].

Body

Works and Contributions

NGC 6819 is credited with the discovery of Caroline Herschel[3].

Why It Matters

NGC 6819 has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2]

References

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

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [5] ↑ . SIMBAD. wikidata.org.
  3. [6] ↑ . VizieR. wikidata.org.
  4. [3] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . SIMBAD. wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . SIMBAD. wikidata.org.
  9. [11] ↑ . SIMBAD. wikidata.org.
  10. [12] ↑ . On Structural Properties of Open Galactic Clusters and their Spatial Distribution. Catalog of Open Galactic Clusters. wikidata.org.
  11. [13] ↑ . A Catalogue of Star Clusters shown on Franklin-Adams Chart Plates. wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . Freebase Data Dumps. wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . SIMBAD. wikidata.org.
  16. [18] ↑ . SIMBAD. wikidata.org.
  17. [19] ↑ . The orbits of open clusters in the Galaxy. wikidata.org.
  18. [20] ↑ . On the metallicity of open clusters. wikidata.org.
  19. [21] ↑ . Astrophysical parameters of Galactic open clusters. wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . Blue Stragglers in Galactic Open Clusters and Integrated Spectral Energy Distributions. wikidata.org.
  23. [25] ↑ . Blue Stragglers in Galactic Open Clusters and Integrated Spectral Energy Distributions. wikidata.org.
  24. [26] ↑ . Blue Stragglers in Galactic Open Clusters and Integrated Spectral Energy Distributions. wikidata.org.
  25. [27] ↑ . Proper motions of the optically visible open clusters based on the UCAC4 catalog. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata sitelinks. 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). NGC 6819. Retrieved May 7, 2026, from https://4ort.xyz/entity/ngc-6819
MLA “NGC 6819.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/ngc-6819.
BibTeX @misc{4ortxyz_ngc-6819_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{NGC 6819}}, year = {2026}, url = {https://4ort.xyz/entity/ngc-6819}, note = {Accessed: 2026-05-07}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): NGC 6819 — https://4ort.xyz/entity/ngc-6819 (retrieved 2026-05-07)

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