astronomy

NGC 5504

NGC 5504 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 NGC 5504 rather than just read about it. In short: NGC 5504 is an intermediate barred spiral galaxy located in the constellation Boötes. Its speed relative to the cosmic microwave background is 5,482 ± 17 km/s, which corresponds to a Hubble distance of 80.9 ± 5.7 Mpc (∼264 million ly).

Key takeaways

NGC 5504 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NGC 5504 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 5504 from memory before moving on to harder problems.

Reference excerpt

NGC 5504 is an intermediate barred spiral galaxy located in the constellation Boötes. Its speed relative to the cosmic microwave background is 5,482 ± 17 km/s, which corresponds to a Hubble distance of 80.9 ± 5.7 Mpc (∼264 million ly). NGC 5504 was discovered by French astronomer Édouard Stephan in 1880. The luminosity class of NGC 5504 is II-III and it has a broad HI line.

Supernova Supernova SN 2013bb (Type IIb, mag. 18.4) was discovered in NGC 5504 on April 3, 2013, as part of Caltech's Catalina Real-Time Transient Survey (CRTS) and by Stan Howerton.

NGC 5504 group

The galaxies IC 4383 and PGC 50713 are located in the same region of the sky as NGC 5504 and their radial speed respectively equal to (5,230 ± 4) km/s and (5,249 ± 6) km/s places them approximately at the same distance as NGC 5504. These three galaxies therefore form a triplet of galaxies, the group of NGC 5504, the brightest of the three galaxies. This group of galaxies is designated as WBL 494 in the article by White published in 1999. IC 4383 is also designated as NGC 5504B and as WBL 494–001 by the NASA/IPAC database while PGC 50713 is designated as NGC 5504C and as WBL 494–003.

See also List of NGC objects (5001–6000)

External links NGC 5504 at NASA/IPAC NGC 5504 at VizieR NGC 5504 at SIMBAD NGC 5504 at LEDA

References

Illustrations

Worked examples

Example 1 — a first encounter with NGC 5504

Start with the simplest possible case. Write down what NGC 5504 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 NGC 5504 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 NGC 5504 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 NGC 5504

In research: NGC 5504 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 NGC 5504 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: NGC 5504 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Barred spiral galaxies, Boötes, Discoveries by Édouard Stephan, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 5504 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study NGC 5504 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 5504 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 NGC 5504 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 5504 in simple terms?

Why does NGC 5504 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 NGC 5504?

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 NGC 5504.