astronomy

Sponde

Sponde 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 Sponde rather than just read about it. In short: Sponde , also known as Jupiter XXXVI, is an irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaiʻi led by Scott S.

Key takeaways

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

Reference excerpt

Sponde , also known as Jupiter XXXVI, is an irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaiʻi led by Scott S. Sheppard in 2001, and given the temporary designation S/2001 J 5. Sponde is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 23.3 million km in 728 days, at an inclination of 146° to the ecliptic, in a retrograde direction and with an eccentricity of 0.189. The frequently changing orbit causes Sponde to next come to apojove (farthest distance from Jupiter) on 5 September 2026 when it will be 0.197 AU (29.5 million km; 18.3 million mi) from Jupiter. It was named in August 2003 after one of the Horae (Hours), which presided over the seventh hour (libations poured after lunch). The Hours, goddesses of the time of day but also of the seasons, were daughters of Zeus (Jupiter) and Themis. The name ends in an "e" because the orbit is retrograde. It belongs to the Pasiphae group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 million km, and with inclinations ranging between 144.5° and 158.3°.

References

Illustrations

Worked examples

Example 1 — a first encounter with Sponde

Start with the simplest possible case. Write down what Sponde 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 Sponde 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 Sponde 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 Sponde

In research: Sponde 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 Sponde 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: Sponde is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 2001, Discoveries by Scott S. Sheppard, Irregular satellites, so understanding it makes those chapters shorter.
In everyday life: Look for Sponde 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 Sponde in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sponde 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 Sponde out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sponde in simple terms?

Sponde , also known as Jupiter XXXVI, is an irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaiʻi led by Scott S.

Why does Sponde 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 Sponde?

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 Sponde.