astronomy

HD 143183

HD 143183 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 143183 rather than just read about it. In short: HD 143183 is a red supergiant variable star of spectral type M3Ia or K2 in the constellation Norma. It is a member of the Norma OB1 association, at a distance of about 2 kiloparsecs.

Key takeaways

HD 143183 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 143183 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 143183 from memory before moving on to harder problems.

Reference excerpt

HD 143183 is a red supergiant variable star of spectral type M3Ia or K2 in the constellation Norma. It is a member of the Norma OB1 association, at a distance of about 2 kiloparsecs. It is one of the most luminous red supergiants with a luminosity over 250,000 times greater than the Sun (L☉), and is as well one of the largest stars with a radius more than a thousand times that of the Sun (R☉). Older studies frequently calculated higher luminosities, which would correspond to larger radii. It has an estimated mass loss rate of 5×10−5 M☉ per year and has been once described as a cool hypergiant. It is surrounded by a dozen early-type stars and a circumstellar nebula which extends 0.12 parsecs (0.39 ly). HD 143183 is catalogued with the variable star designation V558 Normae as its brightness varies irregularly between apparent magnitudes 7.3 and 8.6. It is possible that HD 143183 is a spectroscopic binary with an OB+ companion, but this is considered doubtful. HD 143183 lies approximately 1' from the 10th-magnitude O-class bright giant CD−53 6363, the second-brightest star in the cluster.

References

Illustrations

Worked examples

Example 1 — a first encounter with HD 143183

Start with the simplest possible case. Write down what HD 143183 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 143183 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 143183 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 143183

In research: HD 143183 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 143183 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 143183 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Durchmusterung objects, Henry Draper Catalogue objects, IRAS catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for HD 143183 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 143183 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 143183 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 143183 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 143183 in simple terms?

HD 143183 is a red supergiant variable star of spectral type M3Ia or K2 in the constellation Norma. It is a member of the Norma OB1 association, at a distance of about 2 kiloparsecs.

Why does HD 143183 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 143183?

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 143183.