astronomy

HD 12467

HD 12467 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 12467 rather than just read about it. In short: HD 12467 is a single star in the northern circumpolar constellation of Cepheus. It has a white hue and is barely visible to the naked eye with an apparent visual magnitude of 6.05.

Key takeaways

HD 12467 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 12467 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 12467 from memory before moving on to harder problems.

Reference excerpt

HD 12467 is a single star in the northern circumpolar constellation of Cepheus. It has a white hue and is barely visible to the naked eye with an apparent visual magnitude of 6.05. The distance to this object is 229 light years based on parallax, but it is drifting closer with a heliocentric radial velocity of −9 km/s. This object is an ordinary A-type main-sequence star with a stellar classification of A1.5V, which indicates it is generating energy through core hydrogen fusion. It is 254 million years old with a relatively high projected rotational velocity of 130 km/s. The star has 1.8 times the mass of the Sun and 1.9 times the Sun's radius. It is radiating 16 times the luminosity of the Sun from its photosphere at an effective temperature of 8,528 K. The star displays an infrared excess with a signature that suggests it has two debris disks. The inner disk is orbiting 7.4 AU from the host star with a mean temperature of 200 K, while the outer disk is 50 K at a separation of 119 AU.

References

Worked examples

Example 1 — a first encounter with HD 12467

Start with the simplest possible case. Write down what HD 12467 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 12467 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 12467 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 12467

In research: HD 12467 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 12467 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 12467 is common in secondary-school and first-year university syllabi. It links to neighbouring topics A-type main-sequence stars, Bright Star Catalogue objects, Cepheus (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for HD 12467 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 12467 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 12467 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 12467 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 12467 in simple terms?

HD 12467 is a single star in the northern circumpolar constellation of Cepheus. It has a white hue and is barely visible to the naked eye with an apparent visual magnitude of 6.05.

Why does HD 12467 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 12467?

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 12467.