astronomy

J120011.1+680924.8

J120011.1+680924.8 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 J120011.1+680924.8 rather than just read about it. In short: J120011.1+680924.8 also known as OGC 103 and SDSS J120011.11+680924.8, is a massive elliptical galaxy located in the constellation of Draco. The redshift of the galaxy is estimated to be (z) 0.262 and it is the brightest cluster galaxy of the galaxy cluster called [BVH2007] 136.

Key takeaways

J120011.1+680924.8 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect J120011.1+680924.8 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of J120011.1+680924.8 from memory before moving on to harder problems.

Reference excerpt

J120011.1+680924.8 also known as OGC 103 and SDSS J120011.11+680924.8, is a massive elliptical galaxy located in the constellation of Draco. The redshift of the galaxy is estimated to be (z) 0.262 and it is the brightest cluster galaxy of the galaxy cluster called [BVH2007] 136.

Description J120011.1+680924.8 is an elliptical galaxy with an R-band luminosity of 12.7 based on the luminosity estimation made by Sloan Digital Sky Survey (SDSS). It is one of the most massive galaxies known, with an R-band absolute magnitude of -24.07 and an R-band size of 1.18 kiloparsecs. The galaxy is categorized as an intermediate early-type galaxy whose effective radius is approximately 4.69 parsecs based on a best Sersic fit technique. The dynamical mass of the galaxy is 12.22 M☉. The stellar mass is 10.2 × 1011 M☉ with the galaxy itself being surrounded by a dark matter halo, with the dark matter component displaying a contribution of 6%. The total projected half-light radius is estimated to be 16.2 kiloparsecs based on a fit measurement to its de Vaucouleurs profile. The galaxy has a rounded appearance and is located in the center of the cluster, with its inner profile best described by a shallow core, and has a calculated velocity dispersion of 383 kilometers per seconds. The de Vaucouleurs luminosity of the galaxy is estimated to be -24.47 magnitude, with a high ellipticity of 0.32. The bulge-to-total ratio is 0.72, while the bulge and disk radius is 10.35 and 13.44 kiloparsecs respectively based on an estimation of its de Vaucouleurs bulge plus an exponential disk model. Dust features are not present.

References

External links J120011.1+680924.8 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 J120011.1+680924.8

Start with the simplest possible case. Write down what J120011.1+680924.8 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 J120011.1+680924.8 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 J120011.1+680924.8 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 J120011.1+680924.8

In research: J120011.1+680924.8 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 J120011.1+680924.8 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: J120011.1+680924.8 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Draco (constellation), Elliptical galaxies, LEDA objects, so understanding it makes those chapters shorter.
In everyday life: Look for J120011.1+680924.8 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 J120011.1+680924.8 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what J120011.1+680924.8 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 J120011.1+680924.8 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is J120011.1+680924.8 in simple terms?

Why does J120011.1+680924.8 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 J120011.1+680924.8?

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 J120011.1+680924.8.