astronomy

KIC 11145123

KIC 11145123 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 KIC 11145123 rather than just read about it. In short: KIC 11145123 (sometimes mistakenly called Kepler 11145123), is a white hued star located in the northern constellation Cygnus, the swan. It has an apparent magnitude of 13.12, making it readily visible in large telescopes, but not to the naked eye.

Key takeaways

KIC 11145123 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect KIC 11145123 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of KIC 11145123 from memory before moving on to harder problems.

Reference excerpt

KIC 11145123 (sometimes mistakenly called Kepler 11145123), is a white hued star located in the northern constellation Cygnus, the swan. It has an apparent magnitude of 13.12, making it readily visible in large telescopes, but not to the naked eye. The object is located relatively far at a distance of approximately 3,910 light years, but is rapidly approaching the Solar System with a radial velocity of −136 km/s.

Characteristics KIC 11145123 has a spectral classification of F7V, indicating that it is a main sequence F-type star. Atmospheric models suggest it may be hotter and possibly a late A-type star. It has 1.4 times the mass of the Sun, in contrast to the 1.7 times that would be expected from a normal late A main sequence star, and 1.57 times its radius. It radiates 12 times the luminosity of the Sun from its photosphere at an effective temperature of 7,590 K. Unlike most hot stars, KIC 11145123 spins exceptionally slowly with a projected rotational velocity of 1 km/s. This corresponds to a period of roughly 100 days. Despite appearing as a main sequence star (Gaia DR3 models it as such), it is most likely a blue straggler.

Roundest natural object KIC 11145123 is currently believed be the roundest natural object, with the difference between equatorial and polar radii equaling a mere three kilometers.

References

Worked examples

Example 1 — a first encounter with KIC 11145123

Start with the simplest possible case. Write down what KIC 11145123 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 KIC 11145123 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 KIC 11145123 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 KIC 11145123

In research: KIC 11145123 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 KIC 11145123 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: KIC 11145123 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Blue stragglers, Cygnus (constellation), F-type main-sequence stars, so understanding it makes those chapters shorter.
In everyday life: Look for KIC 11145123 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 KIC 11145123 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what KIC 11145123 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 KIC 11145123 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KIC 11145123 in simple terms?

Why does KIC 11145123 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 KIC 11145123?

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 KIC 11145123.