astronomy

NGC 4653

NGC 4653 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 4653 rather than just read about it. In short: NGC 4653 is an intermediate spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 2,960±24 km/s, which corresponds to a Hubble distance of 142.4 ± 10.0 Mly (43.66 ± 3.08 Mpc).

Key takeaways

NGC 4653 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 4653 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 4653 from memory before moving on to harder problems.

Reference excerpt

NGC 4653 is an intermediate spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 2,960±24 km/s, which corresponds to a Hubble distance of 142.4 ± 10.0 Mly (43.66 ± 3.08 Mpc). However, two non-redshift measurements give a closer distance of 131.11 ± 3.59 Mly (40.200 ± 1.100 Mpc). It was discovered by German-British astronomer William Herschel on 11 April 1787.

NGC 4642 Group NGC 4653 is a member of the NGC 4642 Group (also known as LDC 913). This trio of galaxies includes NGC 4642 and NGC 4690. A study published in 2022 claims that NGC 4653 and NGC 4642 form a physical pair, separated by about 50 kpc, and that there is a high probability of a merger in the near future.

Supernovae Three supernovae have been observed in NGC 4653:

SN 1999gk (Type II, mag. 15.7) was discovered by Perry Berlind on 15 December 1999. SN 2009ik (Type Ia, mag. 15.3) was discovered by Berto Monard on 22 August 2009. SN 2025mqc (Type Ib, mag. 18.78) was discovered by ATLAS on 31 May 2025.

See also List of NGC objects (4001-5000)

References

External links Media related to NGC 4653 at Wikimedia Commons NGC 4653 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 NGC 4653

Start with the simplest possible case. Write down what NGC 4653 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 4653 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 4653 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 4653

In research: NGC 4653 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 4653 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 4653 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1787, Barred spiral galaxies, Discoveries by William Herschel, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 4653 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 NGC 4653 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 4653 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 4653 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 4653 in simple terms?

Why does NGC 4653 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 4653?

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 4653.