HD 29559
star in the constellation Caelum
HD 29559 is a solitary star in the southern constellation Caelum. It has an apparent magnitude of 6.40, placing it near the max naked eye visibility. The star is situated at a distance 408 light years based on parallax measurements but is receding with a heliocentric radial velocity of 24.2 km/s.
HD 29559 has a stellar classification of A5 IV-V — a luminosity class intermediate between a main sequence star and subgiant. It has alternatively been classified as A3 Vs:, indicating that it is an A-type main-sequence star with sharp (narrow) absorption lines due to slow rotation. However, there is uncertainty behind the class.
It has 2.19 times the mass of the Sun and a slightly enlarged diameter of 3.17 R☉. It radiates at 35 times the luminosity of the Sun from its photosphere at an effective temperature of 7,852 K, which gives it a white hue. Contrary to the second classification, HD 29559 spins rapidly with a projected rotational velocity of 176 km/s and has a solar metallicity. It is estimated to be 719 million years old, having completed 85.9% of its main sequence lifetime.
The public source identifies “HD 29559” as star in the constellation Caelum. This brief keeps that definition visible, then builds a research path around star, constellation and Caelum.
Why this record matters
A short description can identify a subject without explaining its stakes. For “HD 29559”, the useful work is to connect “star in the constellation Caelum” to the records capable of establishing context and consequence.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 10, 2026. The linked authority identifier is Q66491991. None of the 0 selected statements returned an explicit reference.
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.
- 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 “HD 29559”, its source revision and the description used here.
- Expand the search: follow HD 29559 primary sources, HD 29559 archive and star 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 “HD 29559”?
- 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 “HD 29559” 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.