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Research dossier · General Reference

NGC 201

galaxy

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 20, 2026
Entity authorityQ1035716 ↗
Source-derived summary

NGC 201 is a spiral galaxy in the constellation of Cetus. It is one of the group members of HCG 7, with the other group members NGC 192, NGC 196, and NGC 197. It was discovered on December 28, 1790 by William Herschel.

NGC 201 is also considered part of a galaxy group known as NGC 192 Group or LGG 10, together with 4 core members: NGC 173, NGC 192, NGC 196, NGC 237 and 1 possible member: NGC 197.

One supernova has been observed in NGC 201: SN 2019yc (Type IIb, mag. 16.7) was discovered by Kōichi Itagaki on 22 January 2019.

Editorial summary

Begin with the source’s own compact description: “NGC 201” is galaxy. The dossier treats that line as a proposition to test through galaxy, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1790, 2019—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, galaxy is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “galaxy” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 20, 2026. The linked authority identifier is Q1035716. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1790 and 2019.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. 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 201”, its source revision and the description used here.
  2. Expand the search: follow NGC 201 primary sources, NGC 201 archive and galaxy 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 201”?
  2. Which institution is responsible for the underlying evidence?
  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 201” 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.