astronomy

HD 92589

HD 92589 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 92589 rather than just read about it. In short: HD 92589 (HR 4183) is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.39, placing it near the limit of naked eye visibility.

Key takeaways

HD 92589 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 92589 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 92589 from memory before moving on to harder problems.

Reference excerpt

HD 92589 (HR 4183) is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.39, placing it near the limit of naked eye visibility. The system is located about 590 light years away based on its parallax shift and has a heliocentric radial velocity of 11 km/s. This indicates that it is drifting away from the Solar System. The system has a composite stellar classification of G8/K0 III + F/G. This indicates that the primary spectrum intermediate between a G8 and K0 giant star while the companion is probably a F-type or G-type star. As of 1991, the pair have a projected separation of 700 mas along a position angle of 48°. Both stars take 1,591 years to orbit each other. At present the visible component has 2.3 times the mass of the Sun but has expanded to 13.07 times its girth. It shines with a luminosity 141 times greater than the Sun from its enlarged photosphere at an effective temperature of 5,171 K, which gives the yellow hue of a G-type star. HD 92589A is metal-deficient, with an iron abundance only 51% that of the Sun and spins leisurely with a projected rotational velocity of 1.6 km/s, common for giant stars.

References

Worked examples

Example 1 — a first encounter with HD 92589

Start with the simplest possible case. Write down what HD 92589 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 92589 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 92589 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 92589

In research: HD 92589 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 92589 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 92589 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Antlia, Bright Star Catalogue objects, Double stars, so understanding it makes those chapters shorter.
In everyday life: Look for HD 92589 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 92589 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 92589 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 92589 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 92589 in simple terms?

HD 92589 (HR 4183) is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.39, placing it near the limit of naked eye visibility.

Why does HD 92589 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 92589?

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 92589.