SN 2004et
supernova
SN 2004et was a bright Type II-P supernova that occurred in the spiral galaxy NGC 6946 (The Fireworks Galaxy), about 22 million light years away from Earth. The star that made the supernova was falsely identified to be a yellow supergiant but was then identified to be a red supergiant of 13.8 solar masses. SN 2004et showed some re-brightening about 1,000 days after the initial supernova probably due to ejecta of circumstellar material or thermal echo. SN 2004et was one of the most luminous Type II-P supernovae ever recorded and characterized.
Discovery
SN 200et was discovered in 2004 and observed until 2009 by using the Spitzer InfarRed Array Camera, a ultra sensitive infrared space telescope that is used to study planets, stars, asteroids, comets, and galaxies.
This brief starts where responsible research should: with the source description of “SN 2004et” as supernova. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as supernova. Its deeper value depends on whether names, dates, institutions and citations support that framing.
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 Jul 2, 2026. The linked authority identifier is Q9329248. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2004 and 2009.
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.
- 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 “SN 2004et”, its source revision and the description used here.
- Expand the search: follow SN 2004et primary sources, SN 2004et archive and 2004et 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 “SN 2004et”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “SN 2004et” 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.