astronomy

HD 132406

HD 132406 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 132406 rather than just read about it. In short: HD 132406 is a star in the northern constellation of Boötes. With an apparent visual magnitude of 8.45, it is invisible to the naked eye.

Key takeaways

HD 132406 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 132406 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 132406 from memory before moving on to harder problems.

Reference excerpt

HD 132406 is a star in the northern constellation of Boötes. With an apparent visual magnitude of 8.45, it is invisible to the naked eye. The distance to this star is 230 light-years (71 parsecs) based on parallax, but it is drifting closer with a radial velocity of −37.8 km/s. The star has an absolute magnitude of 4.30. It has one confirmed exoplanet companion. The stellar classification of HD 132406 is G0V, matching an ordinary G-type main-sequence star like the Sun. It is an older star with an age of up to nine billion years and is spinning with a leisurely projected rotational velocity of 1.7 km/s. It appears to have a similar mass as the Sun but is about 36% greater in girth. The metallicity, or chemical abundance of heavier elements, appears slightly higher than in the Sun. The star is radiating 1.8 times the luminosity of the Sun from its photosphere at an effective temperature of 5,754 K. A planetary companion was announced in 2007, based on the radial velocity variation of the host star as measured using the ELODIE spectrograph instrument. This super Jupiter has an orbital period of 2.67 years with an eccentricity of 0.34. An astrometric measurement of the planet's inclination and true mass was published in 2022 as part of Gaia DR3, and this was updated in 2023.

References

External links HIC 73146 Image HD 132406

Worked examples

Example 1 — a first encounter with HD 132406

Start with the simplest possible case. Write down what HD 132406 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 132406 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 132406 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 132406

In research: HD 132406 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 132406 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 132406 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Boötes, Durchmusterung objects, G-type main-sequence stars, so understanding it makes those chapters shorter.
In everyday life: Look for HD 132406 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 132406 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 132406 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 132406 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 132406 in simple terms?

HD 132406 is a star in the northern constellation of Boötes. With an apparent visual magnitude of 8.45, it is invisible to the naked eye.

Why does HD 132406 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 132406?

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 132406.