astronomy

HAT-P-67

HAT-P-67 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-67 rather than just read about it. In short: HAT-P-67 is a binary star system, made up of a F-type subgiant and a red dwarf star, which is located about 1,200 light-years away in the constellation Hercules. There is a hot Saturn planet orbiting the primary star, which is named HAT-P-67b.

Key takeaways

HAT-P-67 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-67 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HAT-P-67 from memory before moving on to harder problems.

Reference excerpt

HAT-P-67 is a binary star system, made up of a F-type subgiant and a red dwarf star, which is located about 1,200 light-years away in the constellation Hercules. There is a hot Saturn planet orbiting the primary star, which is named HAT-P-67b.

Stellar system The stellar system consists of the F class primary star with a red dwarf companion separated by 9 arc-seconds or about 3400 astronomical units. According to measurements taken by the Gaia spacecraft the two stars have nearly identical parallax and proper motions confirming that they are a binary system. The primary star is a rapidly rotating subgiant star with a radius 2.65 times that of the Sun and a mass 1.64 times that of the Sun. The secondary star is a red dwarf with a radius 0.68 times that of the Sun and a mass 0.58 times that of the Sun.

Planetary system There is one known planet orbiting HAT-P-67A. HAT-P-67b is a gas giant planet transiting its parent star every 4.8 days, at an orbital distance of 0.065 astronomical units (9,700,000 km). It is one of the largest and lowest density planets known as of 2024.

References

External links The Extrasolar Planets Encyclopaedia entry for Hat-P-67b

Worked examples

Example 1 — a first encounter with HAT-P-67

Start with the simplest possible case. Write down what HAT-P-67 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-67 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-67 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-67

In research: HAT-P-67 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-67 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-67 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Binary stars, F-type main-sequence stars, Hercules (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for HAT-P-67 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-67 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HAT-P-67 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-67 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HAT-P-67 in simple terms?

Why does HAT-P-67 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-67?

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-67.