55637 Uni
trans-Neptunian object
55637 Uni (provisional designation 2002 UX25) is a large trans-Neptunian object that orbits the Sun in the Kuiper belt beyond Neptune. It briefly garnered scientific attention when it was found to have an unexpectedly low density of about 0.82 g/cm3.
It was discovered on 30 October 2002, by the Spacewatch program. Spitzer Space Telescope results estimate it to be approximately 659 kilometers (409 miles) in diameter. 2 occultations in 2026 measured diameters of 571 kilometers (355 miles) and 610 kilometers (379 miles). It has one known moon, named Tinia, which was discovered in 2005.
History
Discovery
Uni was discovered by the Spacewatch program on 30 October 2002. It has been observed 212 times with precovery images dating back to 1991.
Numbering and naming
Uni was numbered (55637) by the Minor Planet Center on 16 February 2003 (M.P.C. 47763). On 1 September 2025, the object was named after Uni (), the ancient goddess of marriage, fertility, family, and women in Etruscan religion and myth, and was the patron goddess of Perugia.
“55637 Uni” enters the record as trans-Neptunian object. Crown Archives preserves that source wording while asking what trans-Neptunian and object can confirm, complicate or overturn.
Why this record matters
“55637 Uni” is worth following because a concise public description often conceals a longer documentary argument. Here, trans-Neptunian and object provides the most credible route into that argument.
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 23, 2026. The linked authority identifier is Q155539. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2002, 2026, 2005 and 1991.
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 “55637 Uni”, its source revision and the description used here.
- Expand the search: follow 55637 Uni primary sources, 55637 Uni archive and trans-Neptunian 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 “55637 Uni”?
- What terminology or title could unlock a more precise catalogue search?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “55637 Uni” 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.