astronomy

HD 137058

HD 137058 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 HD 137058 rather than just read about it. In short: HD 137058 is a star in the southern constellation of Lupus. Eggleton and Tokovinin (2008) list it as a single star, although Nitschelm and David (2011) suggested it may be a double-lined spectroscopic binary.

Key takeaways

HD 137058 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HD 137058 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 137058 from memory before moving on to harder problems.

Reference excerpt

HD 137058 is a star in the southern constellation of Lupus. Eggleton and Tokovinin (2008) list it as a single star, although Nitschelm and David (2011) suggested it may be a double-lined spectroscopic binary. Its apparent visual magnitude is 4.60, making it bright enough to be visible to the naked eye. Based on an annual parallax shift of 13.6 mas, it is located approximately 240 light years away. The primary component has a stellar classification of A0 V, indicating it is an A-type main-sequence star. It rotates rapidly, with a projected rotational velocity of 300 km/s, resulting in an oblate shape with an equatorial radius 22% larger than its polar radius. The star radiates 72 times the Sun's luminosity from its photosphere at an effective temperature of 9,283 K.

References

Illustrations

Worked examples

Example 1 — a first encounter with HD 137058

Start with the simplest possible case. Write down what HD 137058 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 HD 137058 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 HD 137058 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 HD 137058

In research: HD 137058 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 HD 137058 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: HD 137058 is common in secondary-school and first-year university syllabi. It links to neighbouring topics A-type main-sequence stars, Bayer objects, Bright Star Catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for HD 137058 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 HD 137058 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 137058 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 HD 137058 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 137058 in simple terms?

Why does HD 137058 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 HD 137058?

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 HD 137058.