astronomy

Masaru Arai

Masaru Arai 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 Masaru Arai rather than just read about it. In short: Masaru Arai (新井優, Arai Masaru; born 1952) is a Japanese amateur astronomer and a discoverer of minor planets and comets. He is credited by the Minor Planet Center with the discovery of 45 minor planets during 1988–1991, all in collaboration with astronomer Hiroshi Mori.

Key takeaways

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

Reference excerpt

Masaru Arai (新井優, Arai Masaru; born 1952) is a Japanese amateur astronomer and a discoverer of minor planets and comets. He is credited by the Minor Planet Center with the discovery of 45 minor planets during 1988–1991, all in collaboration with astronomer Hiroshi Mori. On 5 January 1991, he has also discovered Comet Arai, C/1991 A2. The main-belt asteroid 21082 Araimasaru, discovered by Tsutomu Hioki and Shuji Hayakawa at Okutama in 1991, was named in his honor. Naming citation was published on 6 January 2003 (M.P.C. 47301).

List of discovered minor planets

References

External links Yorii Observatory, instruments and discoveries (in Japanese) COMET ARAI (1991b), IAUC 5157, 7 January 1991 COMET ARAI (1991b), IAUC 5170, 18 January 1991

Worked examples

Example 1 — a first encounter with Masaru Arai

Start with the simplest possible case. Write down what Masaru Arai 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 Masaru Arai 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 Masaru Arai 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 Masaru Arai

In research: Masaru Arai 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 Masaru Arai 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: Masaru Arai is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1952 births, 20th-century Japanese astronomers, Discoverers of asteroids, so understanding it makes those chapters shorter.
In everyday life: Look for Masaru Arai 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 Masaru Arai in 20 minutes

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

Frequently asked questions

What is Masaru Arai in simple terms?

Why does Masaru Arai 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 Masaru Arai?

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 Masaru Arai.