astronomy

LHS 6343

LHS 6343 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 LHS 6343 rather than just read about it. In short: LHS 6343 is a star system in the northern constellation of Lyra. It appears exceedingly faint with a combined apparent magnitude of 13.435.

Key takeaways

LHS 6343 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect LHS 6343 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LHS 6343 from memory before moving on to harder problems.

Reference excerpt

LHS 6343 is a star system in the northern constellation of Lyra. It appears exceedingly faint with a combined apparent magnitude of 13.435. Based on its stellar properties, the system is thought to be about 119.4 light-years (36.6 parsecs) away. LHS 6343 is a binary star with two red dwarfs, designated LHS 6343 A and B, respectively. A brown dwarf orbits LHS 6343 A at a close distance, and periodically transits it. The brown dwarf, designated LHS 6343 C, is located within the brown dwarf desert, a zone around stars where very few brown dwarfs have been discovered. The system was in the field of view of the Kepler spacecraft, and was monitored continuously for possible planets transiting the star, although the transits were found to be caused by LHS 6343 C.

Properties LHS 6343 is a visual binary. Both stars are red dwarf stars that are much less massive compared to the Sun—the primary is 36% the mass of the Sun and the secondary, 29.2% the mass of the Sun. The two stars have been individually resolved using adaptive optics, showing an angular separation of 0.55″, corresponding to a distance of about 20 astronomical units (AU). The brown dwarf LHS 6343 C orbits the primary star LHS 6343 A at a distance of only 0.0797 AU every 12.7 days. It is about 5 billion years old, and models suggest the brown dwarf has a surface temperature of 1130 K. The system hierarchy is similar to NLTT 41135, another red dwarf binary with a brown dwarf orbiting one of the stars.

Possible planet LHS 6343 may have a massive planet within the system. In 2012, transit-timing variation was analyzed for any possible substellar companions that may be perturbing the brown dwarf from its normal orbit. Such an object would be less massive than Jupiter and its orbital period would be 3.5 to 8 times larger than that of the brown dwarf. However, the hypothetical perturber's existence has not been confirmed and warrants more observations of the system.

References

Further reading Herrero, E.; Lanza, A. F.; Ribas, I.; Jordi, C.; Collier Cameron, A.; Morales, J. C. (2014). "Doppler-beaming in the Kepler light curve of LHS 6343 A". Astronomy & Astrophysics. 563: A104. arXiv:1403.2242. Bibcode:2014A&A...563A.104H. doi:10.1051/0004-6361/201323087. S2CID 56162369.

Worked examples

Example 1 — a first encounter with LHS 6343

Start with the simplest possible case. Write down what LHS 6343 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 LHS 6343 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 LHS 6343 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 LHS 6343

In research: LHS 6343 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 LHS 6343 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: LHS 6343 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Binary stars, Brown dwarfs, Kepler objects of interest, so understanding it makes those chapters shorter.
In everyday life: Look for LHS 6343 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 LHS 6343 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what LHS 6343 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 LHS 6343 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LHS 6343 in simple terms?

LHS 6343 is a star system in the northern constellation of Lyra. It appears exceedingly faint with a combined apparent magnitude of 13.435.

Why does LHS 6343 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 LHS 6343?

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 LHS 6343.