astronomy

Masayuki Yanai

Masayuki Yanai 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 Masayuki Yanai rather than just read about it. In short: Masayuki Yanai (箭内政之, Yanai Masayuki; born 1959) is a Japanese astronomer. He is a prolific co-discoverer of minor planets.

Key takeaways

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

Reference excerpt

Masayuki Yanai (箭内政之, Yanai Masayuki; born 1959) is a Japanese astronomer. He is a prolific co-discoverer of minor planets. One of his co-discoveries is the dark, inner main-belt asteroid 3915 Fukushima. He retired from docent for astronomy at Sapporo Science Center. The asteroid 4260 Yanai, discovered by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory (399) in 1989, was named in his honor on 8 July 1990 (M.P.C. 16593).

List of discovered minor planets

See also List of minor planets: 17001–18000 National Astronomical Observatory of Japan

References

External links "NAOJ News". National Astronomical Observatory of Japan. Retrieved 14 October 2016. "OAA Computing and Minor Planet Sections". Orbit Astronomy Association. Retrieved 14 October 2016.

Worked examples

Example 1 — a first encounter with Masayuki Yanai

Start with the simplest possible case. Write down what Masayuki Yanai 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 Masayuki Yanai 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 Masayuki Yanai 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 Masayuki Yanai

In research: Masayuki Yanai 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 Masayuki Yanai 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: Masayuki Yanai is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 births, 20th-century Japanese astronomers, 21st-century Japanese astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Masayuki Yanai 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 Masayuki Yanai in 20 minutes

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

Frequently asked questions

What is Masayuki Yanai in simple terms?

Masayuki Yanai (箭内政之, Yanai Masayuki; born 1959) is a Japanese astronomer. He is a prolific co-discoverer of minor planets.

Why does Masayuki Yanai 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 Masayuki Yanai?

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 Masayuki Yanai.