astronomy

HATS-3

HATS-3 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 HATS-3 rather than just read about it. In short: HATS-3 is an F-type main-sequence star 1,380 light-years (420 parsecs) away. Its surface temperature is 6351±76 K.

Key takeaways

HATS-3 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HATS-3 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HATS-3 from memory before moving on to harder problems.

Reference excerpt

HATS-3 is an F-type main-sequence star 1,380 light-years (420 parsecs) away. Its surface temperature is 6351±76 K. HATS-3 is relatively depleted in its concentration of heavy elements, with a metallicity Fe/H index of −0.157±0.07, but is slightly younger than the Sun at an age of 3.2+0.6−0.4 billion years. A multiplicity survey in 2016 detected a candidate stellar companion to HATS-3, 3.671±0.016 arc-seconds away.

Planetary system In 2013, one planet, named HATS-3b, was discovered on a tight, nearly circular orbit. The planetary orbit of HATS-3b is likely aligned with the equatorial plane of the star, at a misalignment angle of 3±25°. The planetary equilibrium temperature is 1643 K.

References

Worked examples

Example 1 — a first encounter with HATS-3

Start with the simplest possible case. Write down what HATS-3 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 HATS-3 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 HATS-3 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 HATS-3

In research: HATS-3 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 HATS-3 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: HATS-3 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Capricornus, F-type main-sequence stars, Planetary systems with one confirmed planet, so understanding it makes those chapters shorter.
In everyday life: Look for HATS-3 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 HATS-3 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HATS-3 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 HATS-3 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HATS-3 in simple terms?

HATS-3 is an F-type main-sequence star 1,380 light-years (420 parsecs) away. Its surface temperature is 6351±76 K.

Why does HATS-3 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 HATS-3?

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 HATS-3.