astronomy

NGC 6269

NGC 6269 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 6269 rather than just read about it. In short: NGC 6269 is an elliptical galaxy located in the constellation of Hercules. The redshift of the galaxy is (z) 0.034 and it was first discovered by the German astronomer named Albert Marth on June 28, 1864, whom he described it as both small, round and also a faint object.

Key takeaways

NGC 6269 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 6269 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 6269 from memory before moving on to harder problems.

Reference excerpt

NGC 6269 is an elliptical galaxy located in the constellation of Hercules. The redshift of the galaxy is (z) 0.034 and it was first discovered by the German astronomer named Albert Marth on June 28, 1864, whom he described it as both small, round and also a faint object. It is a Type-cD galaxy.

Description NGC 6269 is the central Type-cD galaxy and the brightest cluster galaxy (BCG) of a poor galaxy cluster called AWM 5. It is categorized as a radio galaxy based on a radio morphology study published in 2007. However, the source located in the central region is mainly weak with a pair of resolved radio lobes located from north to south directions, extending from the center by around 25 arcseconds. The radio flux densities of the lobes are estimated to be 8 and 10 mJy. A further study has also shown most of the radio emission is mainly confined to a region located within the optical envelope. The central component has a misaligned radio axis based on imaging. The stellar population in NGC 6269 is estimated to be at 0.95 ± 0.08 billion years, based on a study of stellar populations located at the central regions of brightest cluster galaxies, conducted in 2009. The active galactic nucleus (AGN) cavity is estimated to have a power of 0.02+0.01−0.01 × 1044 erg s−1. The supermassive black hole at the center of the galaxy is classified as now dormant and it has a mass of around 109 M☉. The total blue luminosity of the galaxy has been found to be around -23.63 magnitude.

References

External links NGC 6269 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 6269

Start with the simplest possible case. Write down what NGC 6269 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 6269 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 6269 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 6269

In research: NGC 6269 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 6269 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 6269 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1864, Discoveries by Albert Marth, Elliptical galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 6269 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 6269 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 6269 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 6269 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 6269 in simple terms?

Why does NGC 6269 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 6269?

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 6269.