astronomy

Leda (moon)

Leda (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 Leda (moon) rather than just read about it. In short: Leda , also known as Jupiter XIII, is one of the innermost irregular satellites of Jupiter. Discovery and naming It was discovered by Charles T.

Key takeaways

Leda (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 Leda (moon) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Leda (moon) from memory before moving on to harder problems.

Reference excerpt

Leda , also known as Jupiter XIII, is one of the innermost irregular satellites of Jupiter.

Discovery and naming It was discovered by Charles T. Kowal at the Mount Palomar Observatory on September 14, 1974, after three nights' worth of photographic plates had been taken (September 11 through 13; Leda appears on all of them). It was named after Leda, who was raped by Zeus, the Greek equivalent of Jupiter (who came to her in the form of a swan). Kowal suggested the name and the IAU endorsed it in 1975.

Orbit Leda orbits Jupiter at an average distance of 11,195,980 km in 242.02 days, at an inclination of about 28° to the ecliptic, in a prograde direction and with an eccentricity of 0.165. Leda belongs to the Himalia group, a prograde group of moons orbiting between 11 and 13 million km from Jupiter at inclinations between 27 and 30°, and eccentricities between 0.11 and 0.24.

Physical characteristics

Leda has a diameter of about 21.5 kilometers, with a measured albedo of about 3.4%. Like the other members of the Himalia group, the satellite appears gray (color indices B-V=0.66 ± 0.01, R-V=0.43 0.01), which is typical for C-type asteroids.

Origin Leda probably did not form near Jupiter but was captured by Jupiter later. Like the other members of the Himaila group, which have similar orbits, Leda is probably the remnant of a broken, captured heliocentric asteroid.

See also Jupiter's moons in fiction Fire Maidens of Outer Space (1956 film)

References

External links Leda Overview by NASA's Solar System Exploration David Jewitt pages Jupiter's Known Satellites (by Scott S. Sheppard)

Illustrations

Worked examples

Example 1 — a first encounter with Leda (moon)

Start with the simplest possible case. Write down what Leda (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 Leda (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 Leda (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 Leda (moon)

In research: Leda (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 Leda (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: Leda (moon) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1974, Discoveries by Charles T. Kowal, Himalia group, so understanding it makes those chapters shorter.
In everyday life: Look for Leda (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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Leda (moon)” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Leda (moon) in 20 minutes

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

Frequently asked questions

What is Leda (moon) in simple terms?

Leda , also known as Jupiter XIII, is one of the innermost irregular satellites of Jupiter. Discovery and naming It was discovered by Charles T.

Why does Leda (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 Leda (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 Leda (moon).