astronomy

WASP-189 b

WASP-189 b 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 WASP-189 b rather than just read about it. In short: WASP-189 b (also known as HD 133112 b) is an ultra-hot jupiter that orbits around the A-type star WASP-189 which is located about 322 light years from Earth in the Libra constellation. It was first discovered in 2018, and was observed in 2020 by CHEOPS (Characterising Exoplanets Satellite).

Key takeaways

WASP-189 b belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WASP-189 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WASP-189 b from memory before moving on to harder problems.

Reference excerpt

WASP-189 b (also known as HD 133112 b) is an ultra-hot jupiter that orbits around the A-type star WASP-189 which is located about 322 light years from Earth in the Libra constellation. It was first discovered in 2018, and was observed in 2020 by CHEOPS (Characterising Exoplanets Satellite). It has a mass of 1.99 Jupiters and a radius of 1.6 Jupiters. It orbits around a rapidly rotating A6IV-V star. It has a polar orbit around the star with a distance of 0.05 AU taking around 2.72 days to complete and orbit.

Discovery WASP-189 b was first discovered in 2018 using the transit method. In 2020, astronomers used CHEOPS to observe it.

Characteristics The planet has a mass of around 1.99 Jupiter masses with a radius of around 1.6 Jupiter radii.

Temperature The CHEOPS spacecraft was used to estimate the temperature of WASP-189 b. Assuming inefficient heat redistribution, the temperature of WASP-189 b was estimated to be around 3,200 °C (5,790 °F; 3,470 K). Assuming efficient heat redistribution and zero albedo, the temperature was calculated to be around 2,367 °F (2,367 °F; 1,570 K). These observations would make WASP-189 b a ultra-hot jupiter and one of the hottest known exoplanets discovered to date.

Atmosphere Various spacecraft have been used to study the atmosphere of WASP-189 b such as CHEOPS and CUTE (Colorado Ultraviolet Transit Experiment). The extreme temperatures of ultra-hot Jupiters such as WASP-189 b allow for the study of refractory elements that remain gaseous at high temperatures. Results show that the atmosphere contains many metal and volatile elements. CHEOPS observed titanium oxide (TiO) and vanadium oxide (VO) and a variety of metals such as chromium (Cr), magnesium (Mg), vanadium (V) and manganese (Mn). Singly ionized Iron (Fe, Fe+, Fe ll) and Titanium (Ti, Ti+) were also found. The Immersion Grating Infrared Spectrometer (IGRINS) on Gemini South detected neutral Iron (Fe I), magnesium (Mg I), silicon (Si I), water (H2O), carbon monoxide (CO) and hydroxyl (OH).

See also Hot Jupiter Characterising Exoplanets Satellite (CHEOPS) Wide Angle Search for Planets (WASP)

References

External links Planet WASP-189 b

Worked examples

Example 1 — a first encounter with WASP-189 b

Start with the simplest possible case. Write down what WASP-189 b 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 WASP-189 b 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 WASP-189 b 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 WASP-189 b

In research: WASP-189 b 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 WASP-189 b 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: WASP-189 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanet stubs, Exoplanets discovered by WASP, Exoplanets discovered in 2018, so understanding it makes those chapters shorter.
In everyday life: Look for WASP-189 b 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 WASP-189 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WASP-189 b 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 WASP-189 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WASP-189 b in simple terms?

Why does WASP-189 b 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 WASP-189 b?

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 WASP-189 b.