astronomy

Tinia (moon)

Tinia (moon) is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tinia (moon) rather than just read about it. In short: Tinia is the only known moon of the trans-Neptunian object 55637 Uni. Tinia was discovered in August 2005, by observations with the Hubble Space Telescope, and announced on 22 February 2007.

Key takeaways

Tinia (moon) belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tinia (moon) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tinia (moon) from memory before moving on to harder problems.

Reference excerpt

Tinia is the only known moon of the trans-Neptunian object 55637 Uni. Tinia was discovered in August 2005, by observations with the Hubble Space Telescope, and announced on 22 February 2007. In 2026, a 2 chord stellar occultation was done and estimated Tinia's diameter at approximately 180.8 to 193.0 km. It orbits Uni every 8.3 days at an average distance of 4800 km. Tinia was named together with Uni on 1 September 2025 after Tinia, the Etruscan sky god and husband of the Etruscan goddess of love and fertility Uni.

History

Discovery Uni has one known moon, which is named Tinia. Tinia was discovered in August 2005, by observations with the Hubble Space Telescope, and announced on 22 February 2007.

Naming Tinia was named together with Uni on 1 September 2025 after Tinia, the Etruscan sky god and husband of the Etruscan goddess of love and fertility Uni. Tinia (also Tin, Tinh, Tins or Tina) was the sky god and the highest deity in Etruscan religion, equivalent to the Roman Jupiter and the Greek Zeus.

Occultations

A 2 chord stellar occultation in 2026 was done.

Orbital characteristics

Tinia completes one complete orbit around Uni every 8.3094±0.0002 days, with an orbital eccentricity of 0.17±0.03, indicating a total system mass of (1.25±0.03)×1020 kg. Its orbital eccentricity is 0.17±0.03. It orbits Uni at a distance of 4770 km.

Physical characteristics Tinia was discovered at 0.16 arcseconds from Uni with a difference in absolute magnitude of 2.5. 2 chord stellar occultation in 2026 derived an absolute magnitude of 6.476±0.183 for Tinia, Its diameter is estimated at 180.8±0.6 km, or 193.0±1.0 km.

See also Minor-planet moon#Trans-Neptunian objects Trans-Neptunian object

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with Tinia (moon)

Start with the simplest possible case. Write down what Tinia (moon) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tinia (moon) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tinia (moon) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tinia (moon)

In research: Tinia (moon) appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tinia (moon) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tinia (moon) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 2005, Discoveries by Michael E. Brown, Trans-Neptunian satellites, so understanding it makes those chapters shorter.
In everyday life: Look for Tinia (moon) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tinia (moon) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tinia (moon) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tinia (moon) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tinia (moon) in simple terms?

Tinia is the only known moon of the trans-Neptunian object 55637 Uni. Tinia was discovered in August 2005, by observations with the Hubble Space Telescope, and announced on 22 February 2007.

Why does Tinia (moon) matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tinia (moon)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tinia (moon).