astronomy

HD 117618 b

HD 117618 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 HD 117618 b rather than just read about it. In short: HD 117618 b, named Noifasui by the IAU, is an exoplanet discovered orbiting the star HD 117618 in September 2004. The planet is a small gas giant with a minimum mass just 0.178 times that of Jupiter.

Key takeaways

HD 117618 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 HD 117618 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HD 117618 b from memory before moving on to harder problems.

Reference excerpt

HD 117618 b, named Noifasui by the IAU, is an exoplanet discovered orbiting the star HD 117618 in September 2004. The planet is a small gas giant with a minimum mass just 0.178 times that of Jupiter. It orbits close to its star in a very eccentric orbit.

Name The planet was originally named "HD 117618 b", being the second object in the HD 117618 system. It was given the name "Noifasui" by the IAU, chosen by Indonesian representatives for the NameExoWorlds campaign, meaning revolve around in Nias language (derived from the word ifasui, meaning to revolve around, and no, indicating that the action occurred in the past and continued to the present time). Its parent star was simultaneously named "Dofida" in the contest.

References

External links "HD 117618". Exoplanets. Archived from the original on 2012-02-19. Retrieved 2008-10-31. California & Carnegie Planet Search entry

Worked examples

Example 1 — a first encounter with HD 117618 b

Start with the simplest possible case. Write down what HD 117618 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 HD 117618 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 HD 117618 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 HD 117618 b

In research: HD 117618 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 HD 117618 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: HD 117618 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Centaurus, Exoplanet stubs, Exoplanets detected by radial velocity, so understanding it makes those chapters shorter.
In everyday life: Look for HD 117618 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 HD 117618 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HD 117618 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 HD 117618 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HD 117618 b in simple terms?

HD 117618 b, named Noifasui by the IAU, is an exoplanet discovered orbiting the star HD 117618 in September 2004. The planet is a small gas giant with a minimum mass just 0.178 times that of Jupiter.

Why does HD 117618 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 HD 117618 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 HD 117618 b.