science

IC 361

IC 361 is a science 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 IC 361 rather than just read about it. In short: IC 361, also called Melotte 24 is an open cluster of stars in the constellation Camelopardalis. It was discovered by the British amateur astronomer William F.

Key takeaways

IC 361 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IC 361 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IC 361 from memory before moving on to harder problems.

Reference excerpt

IC 361, also called Melotte 24 is an open cluster of stars in the constellation Camelopardalis. It was discovered by the British amateur astronomer William F. Denning on February 11, 1893. This cluster is located at a distance of 10,500 ± 230 light-years from the Sun. It is very faint with an apparent visual magnitude of 11.7, requiring a telescope to view. Because of its faintness, this cluster has been poorly studied. The cluster spans an angular size of 6.0′. This intermediate–age cluster is located in or beyond the Perseus Arm of the Milky Way galaxy. It is situated near dark nebulae, resulting in significant levels of extinction due to interstellar dust. The cluster has a core radius of 2.0′±0.4′ and a cluster radius of 8.0′±0.5′. At an estimated distance of 3.22 kpc this corresponds to a physical core radius of 6.1 ly and a cluster radius of 24.5 ly. It has an estimated age of 759 million years. The cluster is mildly metal deficient, matching the metallicity gradient of the Milky Way. Two candidate blue stragglers have been identified in this cluster.

References

Further reading Zdanavičius, J.; et al. (2010), "Multicolor CCD Photometry of the Open Cluster IC 361", Baltic Astronomy, 19 (1–2): 63–94, Bibcode:2010BaltA..19...63Z, doi:10.1515/astro-2017-0413. Piccirillo, J.; Stein, W. L. (August 1978), "Preliminary photometry of the open cluster IC 361.", Astronomical Journal, 83: 971–974, Bibcode:1978AJ.....83..971P, doi:10.1086/112277. Shapley, H. (June 1918), "The cluster IC 361", The Observatory, 41: 257, Bibcode:1918Obs....41..257S.

Illustrations

Worked examples

Example 1 — a first encounter with IC 361

Start with the simplest possible case. Write down what IC 361 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 IC 361 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 IC 361 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 IC 361

In research: IC 361 appears in science 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 IC 361 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: IC 361 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Camelopardalis, IC objects, Open clusters, so understanding it makes those chapters shorter.
In everyday life: Look for IC 361 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 IC 361 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IC 361 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 IC 361 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IC 361 in simple terms?

IC 361, also called Melotte 24 is an open cluster of stars in the constellation Camelopardalis. It was discovered by the British amateur astronomer William F.

Why does IC 361 matter?

Because it connects several science 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 IC 361?

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 IC 361.