NGC 3689
galaxy
NGC 3689 is an intermediate spiral galaxy in the constellation of Leo. Its velocity with respect to the cosmic microwave background is 3049 ± 22 km/s, which corresponds to a Hubble distance of 44.97 ± 3.16 Mpc (~147 million light-years). However, 16 non-redshift measurements give a closer distance of 39.350 ± 2.088 Mpc (~128 million light-years). The galaxy was discovered by German-British astronomer William Herschel on 6 April 1785.
NGC 3689 is a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure.
The SAGA Astronomical Survey for the search for satellite galaxies orbiting another galaxy confirmed the presence of two satellite galaxies for NGC 3689.
Supernovae
Two supernovae have been observed in NGC 3689:
AT 2024mxe (type Gap, mag. 17.7) was a calcium-rich supernova discovered by GOTO on 26 June 2024.
SN 2026gwx (Type Ib, mag.
“NGC 3689” enters the record as galaxy. Crown Archives preserves that source wording while asking what galaxy can confirm, complicate or overturn.
Why this record matters
“NGC 3689” is worth following because a concise public description often conceals a longer documentary argument. Here, galaxy provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 3, 2026. The linked authority identifier is Q1105904. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1785 and 2024.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. 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.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “NGC 3689”, its source revision and the description used here.
- Expand the search: follow NGC 3689 primary sources, NGC 3689 archive and galaxy research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “NGC 3689”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “NGC 3689” 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.