astronomy

HD 94717

HD 94717 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 94717 rather than just read about it. In short: HD 94717, also known as HR 4268, is a solitary orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility.

Key takeaways

HD 94717 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 94717 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 94717 from memory before moving on to harder problems.

Reference excerpt

HD 94717, also known as HR 4268, is a solitary orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility. The object is located relatively far at a distance of 1,750 light years based on Gaia DR3 parallax measurements, but it is receding with a heliocentric radial velocity of 3.4 km/s. At its current distance, HD 94717's brightness is diminished by 0.62 magnitudes due to interstellar dust. HD 94717 has a stellar classification of K2 II/III, indicating that it is an evolved red giant with the blended luminosity class of a giant star and a bright giant. It is estimated to be 63 million years old, enough time for it to cool and expand to 78 times the Sun's radius. It has 6.3 times the mass of the Sun and radiates 1,847 times the luminosity of the Sun from its photosphere at an effective temperature of 4,446 K. HD 94717 has a solar metallicity and spins modestly with a projected rotational velocity of 2.4 km/s.

References

Illustrations

Worked examples

Example 1 — a first encounter with HD 94717

Start with the simplest possible case. Write down what HD 94717 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 94717 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 94717 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 94717

In research: HD 94717 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 94717 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 94717 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bright Star Catalogue objects, Chamaeleon, Durchmusterung objects, so understanding it makes those chapters shorter.
In everyday life: Look for HD 94717 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “HD 94717” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study HD 94717 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 94717 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 94717 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 94717 in simple terms?

Why does HD 94717 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 94717?

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 94717.