astronomy

UGC 12840

UGC 12840 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 UGC 12840 rather than just read about it. In short: UGC 12840 is a lenticular galaxy located in the constellation of Pegasus. The redshift of this galaxy is estimated to be (z) 0.022 and it was first discovered by astronomers in September 1982 where they found it in the Pegasus Supercluster.

Key takeaways

UGC 12840 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect UGC 12840 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of UGC 12840 from memory before moving on to harder problems.

Reference excerpt

UGC 12840 is a lenticular galaxy located in the constellation of Pegasus. The redshift of this galaxy is estimated to be (z) 0.022 and it was first discovered by astronomers in September 1982 where they found it in the Pegasus Supercluster. It is also categorized as an isolated galaxy.

Description UGC 12840 is a gas-rich face-on lenticular galaxy with an SB0 morphology. The appearance of the galaxy looks almost round but the rotation velocity has a large projection of 100 kilometers per seconds. There is also an outer H II ring structure with a diameter of 11.4 kiloparsecs, with further evidence of a nuclear emission line source described as bright. The far-infrared emission of the galaxy has been estimated as 0.40 jansky at 100 micrometer (ɥm) detections. A study published in December 2003, has found UGC 12840 is a late-type galaxy. The total molecular gas mass has been estimated to be 8.25 M☉ based on its carbon oxide (CO) line intensity with the heliocentric velocity of the lines calculated as 6,850 kilometers per seconds. The center of the galaxy possibly displays noncircular gas motions. A giant ring is also detected in addition with a measured total radius of 12.5 kiloparsecs and has hydrogen-alpha emission.

References

External links UGC 12840 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 UGC 12840

Start with the simplest possible case. Write down what UGC 12840 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 UGC 12840 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 UGC 12840 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 UGC 12840

In research: UGC 12840 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 UGC 12840 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: UGC 12840 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1982, Lenticular galaxies, MCG objects, so understanding it makes those chapters shorter.
In everyday life: Look for UGC 12840 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 UGC 12840 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what UGC 12840 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 UGC 12840 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is UGC 12840 in simple terms?

Why does UGC 12840 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 UGC 12840?

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 UGC 12840.