astronomy

IC 4182

IC 4182 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 IC 4182 rather than just read about it. In short: IC 4182 is a Magellanic spiral galaxy in the constellation Canes Venatici. The galaxy lies about 14 million light years away from Earth, which means, given its apparent dimensions, that IC 4182 is approximately 28,000 light years across.

Key takeaways

IC 4182 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IC 4182 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IC 4182 from memory before moving on to harder problems.

Reference excerpt

IC 4182 is a Magellanic spiral galaxy in the constellation Canes Venatici. The galaxy lies about 14 million light years away from Earth, which means, given its apparent dimensions, that IC 4182 is approximately 28,000 light years across. It was discovered by German astronomer Max Wolf on 21 March 1903. IC 4182 is seen nearly face-on. It has a low surface brightness disk with patch of star formation and no spiral pattern. The galaxy is close enough for its brightest stars to be resolvable through large telescopes, having a photometric blue filter apparent magnitude of 19.2, and a visual magnitude of around 20 for the brightest blue stars and around 21 for the brightest red stars. The density of ultraviolet sources decreases monotonically with radius. The galaxy is considered to be a member of the M94 Group, while Garcia considered the galaxy to be a member of the LGG 334 group, along with NGC 5005 and NGC 5033.

Supernova

One supernova has been observed in IC 4182: SN 1937C (Type Ia, mag. 8.4) was discovered by Fritz Zwicky on 24 August 1937. The supernova was located 30 arcseconds north and 40 arcseconds east of the nucleus, and was a few days post maximum. The peak apparent B-magnitude was estimated to have been 8.7. The galaxy was observed repeatedly by the Hubble Space Telescope in 1992, leading to the discovery of Cepheid variable stars within it. SN 1937C then became the first Type Ia supernova to have its distance calibrated with Cepheid stars, and then used as standard candles to calculate the Hubble constant.

References

External links

IC 4182 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Illustrations

Worked examples

Example 1 — a first encounter with IC 4182

Start with the simplest possible case. Write down what IC 4182 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 IC 4182 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 4182 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 4182

In research: IC 4182 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 IC 4182 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 4182 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1903, Canes Venatici, Discoveries by Max Wolf, so understanding it makes those chapters shorter.
In everyday life: Look for IC 4182 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 4182 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IC 4182 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 4182 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IC 4182 in simple terms?

Why does IC 4182 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 IC 4182?

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 4182.