astronomy

HAT-P-12b

HAT-P-12b 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 HAT-P-12b rather than just read about it. In short: HAT-P-12b, formally named Puli, is an extrasolar planet approximately 468 light years away from Earth, orbiting the 13th magnitude K-type star HAT-P-12, which is located in Canes Venatici constellation. It is a transiting hot Jupiter that was discovered by the HATNet Project on April 29, 2009.

Key takeaways

HAT-P-12b belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HAT-P-12b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HAT-P-12b from memory before moving on to harder problems.

Reference excerpt

HAT-P-12b, formally named Puli, is an extrasolar planet approximately 468 light years away from Earth, orbiting the 13th magnitude K-type star HAT-P-12, which is located in Canes Venatici constellation. It is a transiting hot Jupiter that was discovered by the HATNet Project on April 29, 2009. HAT-P-12b is a H/He-dominated gas giant planet with a core mass of 11.3+2.6−2.1 M🜨 and is moderately irradiated by its low-metallicity host star. Therefore, HAT-P-12b is most likely an H/He-dominated planet with a core of perhaps ~10 M🜨, and a total metal fraction of ~15%. At the time of its discovery, this made HAT-P-12b the least massive H/He-dominated gas giant planet found to date; the previous record holder was Saturn. In 2020, the obtained transmission spectra have revealed that the atmosphere of HAT-P-12b is cloudy, with haze above cloud tops. Water was detected. The prevalence of clouds and hazes in planetary atmosphere was disputed in 2021 though. In August 2022, this planet and its host star were included among 20 systems to be named by the third NameExoWorlds project. The approved names, proposed by a team from Hungary, were announced in June 2023. HAT-P-12b is named Puli and its host star is named Komondor, after the Hungarian Puli and Komondor dog breeds.

References

External links Media related to HAT-P-12b at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with HAT-P-12b

Start with the simplest possible case. Write down what HAT-P-12b 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 HAT-P-12b 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 HAT-P-12b 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 HAT-P-12b

In research: HAT-P-12b 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 HAT-P-12b 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: HAT-P-12b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Canes Venatici, Exoplanets discovered by HATNet, Exoplanets discovered in 2009, so understanding it makes those chapters shorter.
In everyday life: Look for HAT-P-12b 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 HAT-P-12b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HAT-P-12b 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 HAT-P-12b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HAT-P-12b in simple terms?

Why does HAT-P-12b 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 HAT-P-12b?

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 HAT-P-12b.