astronomy

HD 82886

HD 82886 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 82886 rather than just read about it. In short: HD 82886, also named Illyrian, is a star with an orbiting exoplanet located in the constellation Leo Minor. It has an apparent visual magnitude of 7.63, making it too faint to be viewed with the naked eye.

Key takeaways

HD 82886 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 82886 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 82886 from memory before moving on to harder problems.

Reference excerpt

HD 82886, also named Illyrian, is a star with an orbiting exoplanet located in the constellation Leo Minor. It has an apparent visual magnitude of 7.63, making it too faint to be viewed with the naked eye. The distance to this system is approximately 413 light years, as measured using parallax. It is drifting further away with a heliocentric radial velocity of 12.7 km/s. This is an aging subgiant star with a stellar classification of G0. With approximately 2.5 times the mass of the Sun, and an estimated age of 3–4 billion years, it has exhausted the supply of hydrogen at its core and expanded to more than five times the Sun's radius . The star is radiating nearly 12 times the Sun's luminosity from its photosphere at an effective temperature of 4,953 K. HD 82886 and its planet HD 82886b were chosen as part of the 2019 NameExoWorlds campaign organised by the International Astronomical Union, which assigned each country a star and planet to name. HD 82886 was assigned to Albania. The winning proposal named the star Illyrian, after the ancient people of the Balkans region (including Albania), and the planet Arber, after the medieval term for the inhabitants of Albania.

Planetary system A super-jovian exoplanet was discovered in 2011. It has at least 1.3 times the mass of Jupiter and is orbiting the host star at an approximate distance of 1.65 AU every 705 days.

References

Worked examples

Example 1 — a first encounter with HD 82886

Start with the simplest possible case. Write down what HD 82886 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 82886 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 82886 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 82886

In research: HD 82886 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 82886 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 82886 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Durchmusterung objects, G-type subgiants, Henry Draper Catalogue objects, so understanding it makes those chapters shorter.
In everyday life: Look for HD 82886 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 82886 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 82886 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 82886 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 82886 in simple terms?

Why does HD 82886 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 82886?

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 82886.