astronomy

Kepler-167

Kepler-167 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 Kepler-167 rather than just read about it. In short: Kepler-167 is a K-type main-sequence star located about 1,119 light-years (343 pc) away from the Solar System in the constellation of Cygnus. The star has about 78% the mass and 75% the radius of the Sun, and a temperature of 4,884 K (4,611 °C; 8,332 °F).

Key takeaways

Kepler-167 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kepler-167 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kepler-167 from memory before moving on to harder problems.

Reference excerpt

Kepler-167 is a K-type main-sequence star located about 1,119 light-years (343 pc) away from the Solar System in the constellation of Cygnus. The star has about 78% the mass and 75% the radius of the Sun, and a temperature of 4,884 K (4,611 °C; 8,332 °F). It hosts a system of four known exoplanets. There is also a companion red dwarf star at a separation of about 700 AU, with an estimated orbital period of over 15,000 years.

Planetary system Kepler-167 is orbited by four known transiting exoplanets, discovered using the Kepler space telescope. The inner three planets are all super-Earths of unknown composition orbiting closer to their star than Mercury is to the Sun. The outermost planet, Kepler-167e, is a Jupiter analog, with 0.91 RJ, 1.01 MJ, and an equilibrium temperature of 134 K (−139 °C; −218 °F). It is the first transiting Jupiter analog discovered. The inner two planets were confirmed in 2014, as part of a study validating hundreds of Kepler planets, and the outer two planets were confirmed in 2016. Observations of Kepler-167e using the Spitzer Space Telescope, published in 2019, ruled out significant transit timing variations, making it easier to predict future transits and plan follow-up observations. As a rare example of a long-period transiting gas giant, Kepler-167e is a target of interest for further observations, for example to characterize its atmosphere. As of 2022, four transits of planet e have been detected, with both space-based and ground-based observations. In 2025, there was a search of exomoons around the exoplanet Kepler-167e by astronomer David Kipping and his team using JWST with some results but no conclusion was reached. One candidate event, which would give an orbit close to the Roche limit, may be better modeled as the planet passing in front of a starspot; no conclusion can be reached until the next transit in October 2027.

References

Worked examples

Example 1 — a first encounter with Kepler-167

Start with the simplest possible case. Write down what Kepler-167 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 Kepler-167 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 Kepler-167 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 Kepler-167

In research: Kepler-167 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 Kepler-167 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: Kepler-167 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Binary stars, Cygnus (constellation), K-type main-sequence stars, so understanding it makes those chapters shorter.
In everyday life: Look for Kepler-167 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 Kepler-167 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kepler-167 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 Kepler-167 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kepler-167 in simple terms?

Why does Kepler-167 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 Kepler-167?

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 Kepler-167.