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Research dossier · General Reference

NGC 5056

quasar

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 3, 2026
Entity authorityQ1116695 ↗
Source-derived summary

NGC 5056 is a spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 5,839±17 km/s, which corresponds to a Hubble distance of 280.9 ± 19.7 Mly (86.13 ± 6.03 Mpc). However, 39 non-redshift measurements give a closer mean distance of 208.31 ± 10.46 Mly (63.867 ± 3.207 Mpc). It was discovered by German-British astronomer William Herschel on 13 March 1785.

NGC 5056 is listed as having an active galactic nucleus.

According to Abraham Mahtessian, NGC 5056 and NGC 5065 form a pair of galaxies, known as [M98j] 192.

Supernova

One supernova has been observed in NGC 5056:

SN 2005au (Type II, mag. 15.8) was discovered by British amateur astronomer Ron Arbour on 19 March 2005.

Editorial summary

This brief starts where responsible research should: with the source description of “NGC 5056” as quasar. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1785, 2005—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where quasar can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the general reference register because the source frames it as quasar. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 3, 2026. The linked authority identifier is Q1116695. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1785 and 2005.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “NGC 5056”, its source revision and the description used here.
  2. Expand the search: follow NGC 5056 primary sources, NGC 5056 archive and quasar research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “NGC 5056”?
  2. What terminology or title could unlock a more precise catalogue search?
  3. Which cited source is closest to the event, object or claim?
Subject index

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Source & attribution

This entry incorporates text from “NGC 5056” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.