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Hickson 40

galaxy cluster in the constellation Hydra
Thing Interacting Galaxies Q9291965

Facts

8 properties
Instance of
interacting galaxies, interacting galaxy[1]
Apparent magnitude
15[7]
Catalog code
APG 321, HCG 40, [DMP2012] 34[2][3][4]
Declination
-4.8517°[10]
Epoch
J2000.0[11]
Radial velocity
6,611 km/s[8]
Redshift
0.022300, 0.0223[5][6]
Right ascension
144.7250°[9]
🏷️ Also known as
en Hickson 40 de Arp 321 fr HCG 40 pl Arp 321
🔖 Identifiers · 3
Image (Wikimedia Commons)
ARP321 - HST - Hickson Compact Group 40.jpg ↗
Google Knowledge Graph ID
/g/120_gdvf
SIMBAD ID
APG 321

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🔗 Connections
Epoch 1
J2000.0
Instance of 1
interacting galaxy
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References

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

Direct Wikidata claims

  1. [1] ↑ . SIMBAD. wikidata.org.
  2. [2] ↑ . SIMBAD. wikidata.org.
  3. [3] ↑ . SIMBAD. wikidata.org.
  4. [4] ↑ . SIMBAD. wikidata.org.
  5. [5] ↑ . Dynamical properties of compact groups of galaxies. wikidata.org.
  6. [6] ↑ . Dynamical properties of compact groups of galaxies. wikidata.org.
  7. [7] ↑ . SIMBAD. wikidata.org.
  8. [8] ↑ . Dynamical properties of compact groups of galaxies. wikidata.org.
  9. [9] ↑ . Systematic properties of compact groups of galaxies. wikidata.org.
  10. [10] ↑ . Systematic properties of compact groups of galaxies. wikidata.org.
  11. [11] ↑ . Systematic properties of compact groups of galaxies. 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). Hickson 40. Retrieved November 12, 2026, from https://4ort.xyz/entity/hickson-40
MLA “Hickson 40.” 4ort.xyz Knowledge Graph, 4ort.xyz, 12 Nov. 2026, https://4ort.xyz/entity/hickson-40.
BibTeX @misc{4ortxyz_hickson-40_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Hickson 40}}, year = {2026}, url = {https://4ort.xyz/entity/hickson-40}, note = {Accessed: 2026-11-12}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Hickson 40 — https://4ort.xyz/entity/hickson-40 (retrieved 2026-11-12)

Canonical URL: https://4ort.xyz/entity/hickson-40 · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 16w ago · Dirac · 2026-07-20 view diff on Wikidata ↗
    Redshift → 0.0223
    Radial velocity → 6,611 kilometre per second
    Instance of → interacting galaxies, galaxy, interacting galaxy +1
    Apparent magnitude → 15
    + 4 other properties edited (see Wikidata diff for full list)
    "Created claim: Image: ARP321 - HST - Hickson Compact Group 40.jpg, batch #261337"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.