astronomy

Kepler-419b

Kepler-419b 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-419b rather than just read about it. In short: Kepler-419b (also known by its Kepler Object of Interest designation KOI-1474.01) is a hot Jupiter exoplanet orbiting the star Kepler-419, the outermost of two such planets discovered by NASA's Kepler spacecraft. It is located about 3,400 light-years (1040 parsecs from Earth in the constellation Cygnus.

Key takeaways

Kepler-419b 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-419b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kepler-419b from memory before moving on to harder problems.

Reference excerpt

Kepler-419b (also known by its Kepler Object of Interest designation KOI-1474.01) is a hot Jupiter exoplanet orbiting the star Kepler-419, the outermost of two such planets discovered by NASA's Kepler spacecraft. It is located about 3,400 light-years (1040 parsecs from Earth in the constellation Cygnus.

Characteristics

Mass, radius and temperature Kepler-419b is a hot Jupiter, an exoplanet that has a radius and mass near that of the planet Jupiter, but with a much higher temperature. It has a temperature of 505 K (232 °C; 449 °F). It has a mass of 2.5 MJ and a radius of 0.96 RJ.

Host star The planet orbits an (F-type) star named Kepler-419. The star has a mass of 1.39 M☉ and a radius 1.75 R☉. It has a surface temperatures of 6430 K and is 2.8 billion years old. In comparison, the Sun is about 4.6 billion years old and has a surface temperature of 5778 K. The star's apparent magnitude, or how bright it appears from Earth's perspective, is 13. It is too dim to be seen with the naked eye.

Orbit Kepler-419b orbits its host star with 270% of the Sun's luminosity (2.7 L☉) about every 67 days at a distance of 0.37 AU (close to the orbital distance of Mercury from the Sun, which is 0.38 AU). It has a highly eccentric orbit, with an eccentricity of 0.833.

Discovery In 2009, NASA's Kepler spacecraft was completing observing stars on its photometer, the instrument it uses to detect transit events, in which a planet crosses in front of and dims its host star for a brief and roughly regular period of time. In this last test, Kepler observed 50000 stars in the Kepler Input Catalog, including Kepler-419, the preliminary light curves were sent to the Kepler science team for analysis, who chose obvious planetary companions from the bunch for follow-up at observatories. Observations for the potential exoplanet candidates took place between 13 May 2009 and 17 March 2012. After observing the respective transits, the first planet, Kepler-419b, was announced.

References

External links NASA – Kepler Mission. NASA – Kepler Discoveries – Summary Table. NASA – Kepler-419b at The NASA Exoplanet Archive. NASA – Kepler-419b at The Exoplanet Data Explorer. NASA – Kepler-419b at The Extrasolar Planets Encyclopaedia.

Worked examples

Example 1 — a first encounter with Kepler-419b

Start with the simplest possible case. Write down what Kepler-419b 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-419b 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-419b 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-419b

In research: Kepler-419b 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-419b 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-419b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cygnus (constellation), Exoplanets discovered by the Kepler space telescope, Exoplanets discovered in 2014, so understanding it makes those chapters shorter.
In everyday life: Look for Kepler-419b 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-419b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kepler-419b 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-419b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kepler-419b in simple terms?

Why does Kepler-419b 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-419b?

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-419b.