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astronomy

KELT-6

KELT-6 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 KELT-6 rather than just read about it. In short: KELT-6, also known as BD+31 2447, is a star in the constellation Coma Berenices. With an apparent magnitude of 10.34, it is impossible to see with the unaided eye, but can be seen with a powerful telescope.

Key takeaways

  • KELT-6 belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect KELT-6 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of KELT-6 from memory before moving on to harder problems.

Reference excerpt

KELT-6, also known as BD+31 2447, is a star in the constellation Coma Berenices. With an apparent magnitude of 10.34, it is impossible to see with the unaided eye, but can be seen with a powerful telescope. The star is located about 794 light years away from the Solar System based on parallax, but is drifting away with a radial velocity of 1.62 km/s.

Properties KELT-6 is an F-type star that is 13% more massive and 53% larger than the Sun. It radiates at 3.25 times the Sun's luminosity from its photosphere at an effective temperature of 6,727 K. KELT-6 has a projected rotational velocity of 4.53 km/s, and is slightly older than the Sun, with an age of 4.9 billion years. Unlike most host stars of exoplanets, it has a poor metallicity, with 52.5% the abundance of heavy metals compared to the Sun.

Planetary system In 2013, a long period "hot Jupiter" was discovered orbiting the star using the transit method. Another planet was discovered in 2015 using the radial velocity (doppler spectroscopy) method.

See also List of most luminous stars List of most massive stars Lists of stars Lists of stars by constellation

References

Worked examples

Example 1 — a first encounter with KELT-6

Start with the simplest possible case. Write down what KELT-6 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 KELT-6 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 KELT-6 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 KELT-6

In research
KELT-6 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 KELT-6 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
KELT-6 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Coma Berenices, Durchmusterung objects, F-type subgiants, so understanding it makes those chapters shorter.
In everyday life
Look for KELT-6 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 KELT-6 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what KELT-6 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain KELT-6 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KELT-6 in simple terms?

KELT-6, also known as BD+31 2447, is a star in the constellation Coma Berenices. With an apparent magnitude of 10.34, it is impossible to see with the unaided eye, but can be seen with a powerful telescope.

Why does KELT-6 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 KELT-6?

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 KELT-6.

Tags

  • Coma Berenices
  • Durchmusterung objects
  • F-type subgiants
  • Planetary systems with two confirmed planets

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