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Copeland Septet

group of galaxies in the constellation Leo
Thing Galaxy Group Q22712927

Facts

11 properties
Instance of
galaxy group, galaxy cluster, interacting galaxies, galaxy, compact group of galaxies, Hickson Compact Group, heptad[3][4][5][6][7][8]
Apparent magnitude
15.4[15]
Catalog code
HCG 57, APG 320, WBL 343[10][11][12]
Constellation
Leo[9]
Declination
21.98500°[18]
Discoverer or inventor
Ralph Copeland[2]
Epoch
J2000.0
Radial velocity
8,727 km/s[16]
Redshift
0.029901[14]
Right ascension
174.46042°[17]
Time of discovery or invention
1874[13]
🏷️ Also known as
en Copeland Septet en Copeland's Septet el Επτάδα του Κόουπλαντ fr Septet de Copeland it Settetto di Copeland ja コープランドの七つ子 tr ARP 320 tr Copeland Yedilisi tr HCG 057 zh 科普蘭七重奏
🔖 Identifiers · 4
Image (Wikimedia Commons)
N3750s-crop.jpg ↗
Google Knowledge Graph ID
/g/122bxq_1, /g/11x7vj69q, /g/121d1hdm
SIMBAD ID
HCG 57
Topic's main category
Category:Copeland Septet

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🔗 Connections
Instance of 4
galaxy, galaxy cluster, galaxy group, Hickson Compact Group
Constellation 1
Leo
Discoverer or inventor 1
Ralph Copeland
Epoch 1
J2000.0
Press Enter · cited answer in seconds

Summary

Copeland Septet is a galaxy group[1].

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] ↑ . SIMBAD. wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [2] ↑ . wikidata.org.
  9. [10] ↑ . SIMBAD. wikidata.org.
  10. [11] ↑ . SIMBAD. wikidata.org.
  11. [12] ↑ . SIMBAD. wikidata.org.
  12. [13] ↑ . wikidata.org.
  13. [14] ↑ . Compact groups in the UZC galaxy sample. wikidata.org.
  14. [15] ↑ . SIMBAD. wikidata.org.
  15. [16] ↑ . Environments of redshift survey compact groups of galaxies. wikidata.org.
  16. [17] ↑ . The L_X_-{sigma} relation for galaxies and clusters of galaxies. wikidata.org.
  17. [18] ↑ . The L_X_-{sigma} relation for galaxies and clusters of galaxies. 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). Copeland Septet. Retrieved November 12, 2026, from https://4ort.xyz/entity/copeland-septet
MLA “Copeland Septet.” 4ort.xyz Knowledge Graph, 4ort.xyz, 12 Nov. 2026, https://4ort.xyz/entity/copeland-septet.
BibTeX @misc{4ortxyz_copeland-septet_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Copeland Septet}}, year = {2026}, url = {https://4ort.xyz/entity/copeland-septet}, note = {Accessed: 2026-11-12}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Copeland Septet — https://4ort.xyz/entity/copeland-septet (retrieved 2026-11-12)

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