astronomy

NGC 4136

NGC 4136 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 4136 rather than just read about it. In short: NGC 4136 is a barred spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 893±20 km/s, which corresponds to a Hubble distance of 43.0 ± 3.2 Mly (13.17 ± 0.97 Mpc).

Key takeaways

NGC 4136 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 4136 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 4136 from memory before moving on to harder problems.

Reference excerpt

NGC 4136 is a barred spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 893±20 km/s, which corresponds to a Hubble distance of 43.0 ± 3.2 Mly (13.17 ± 0.97 Mpc). Additionally, seven non-redshift measurements give a distance of 37.53 ± 4.85 Mly (11.506 ± 1.488 Mpc). It was discovered by German-British astronomer William Herschel on 13 March 1785.

Morphology Eskridge, Frogel, and Pogge published a paper in 2002 describing the morphology of 205 closely spaced spiral or lenticular galaxies. The observations were made in the H-band of the infrared and in the B-band (blue). Eskridge and colleagues described NGC 4136 as follows:

Small, centrally condensed bulge, threaded by a short, thick bar. Bar ends on a full, high-contrast inner ring. The major axis of the ring is nearly orthogonal to that of the bar. Two open, LSB [Low Surface Brightness] spiral arms emerge from the major axis ends of the ring and can be traced through ~120° before fading. The south arm is fainter than the north arm. Most of the bright knots are associated with the interarm disk...We classify NGC 4136 substantially earlier in the H band because the outer, open spiral arms are very faint in the near-IR, leaving the inner arm/ring structure as the spiral feature that dominates the classification.

NGC 4274 Group NGC 4136 is a member of the NGC 4274 group (also known as LGG 279) which has at least 19 galaxies, including NGC 4020, NGC 4062, NGC 4173, NGC 4203, NGC 4245, NGC 4251, NGC 4274, NGC 4278, NGC 4283, NGC 4310, NGC 4314, NGC 4359, NGC 4414, NGC 4509, NGC 4525, UGC 7300, and MCG +05-29-066.

Supernova One supernova has been observed in NGC 4136: SN 1941C (type unknown, mag. 16.8) was discovered by Rebecca B. Jones on 16 April 1941.

See also List of NGC objects (4001–5000)

References

External links Media related to NGC 4136 at Wikimedia Commons NGC 4136 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 4136

Start with the simplest possible case. Write down what NGC 4136 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 4136 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 4136 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 4136

In research: NGC 4136 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 4136 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 4136 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1785, Barred spiral galaxies, Coma Berenices, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 4136 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 4136 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 4136 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 4136 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 4136 in simple terms?

Why does NGC 4136 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 4136?

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 4136.