astronomy

J10405643–0103584

J10405643–0103584 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 J10405643–0103584 rather than just read about it. In short: J10405643–0103584 also known as 2MASX J10405643–0103584 is a massive lenticular galaxy in the constellation of Sextans. The redshift of the galaxy has been estimated as (z) 0.25 and it is the brightest cluster galaxy (BCG) in the center of a low-mass galaxy cluster called SDSS CE J160.241898–01.069106.

Key takeaways

J10405643–0103584 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect J10405643–0103584 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of J10405643–0103584 from memory before moving on to harder problems.

Reference excerpt

J10405643–0103584 also known as 2MASX J10405643–0103584 is a massive lenticular galaxy in the constellation of Sextans. The redshift of the galaxy has been estimated as (z) 0.25 and it is the brightest cluster galaxy (BCG) in the center of a low-mass galaxy cluster called SDSS CE J160.241898–01.069106.

Description The galaxy is described as one of the most massive galaxies known, with a measured absolute R-band magnitude of -24.27 and an R-band size that is approximately 1.30 kiloparsecs. It is classified as a supermassive early-type elliptical galaxy whose inner profile is best described by a shallow core, with a velocity dispersion calculated as 424 kilometers per second. The total bulge and disk radius has been estimated as 29.34 and 18.75 kiloparsecs respectively based on its de Vaucouleurs bulge and exponential disk model. The disk of the galaxy itself has an inclination of 2° at a position angle of 74° and a measured disk exponential scale length of 12.43. The galaxy has a symmetric morphology. Several satellite galaxies of low masses surround it, and it is also bulge-dominated, with a bulge fraction ratio roughly estimated as B/T = 0.66, making this the highest known when studied, suggesting it transitioned into a lenticular galaxy from an elliptical galaxy when its galactic disk was reformed via galaxy mergers. The total star formation is estimated to be 9.3 M☉ per year with a total stellar mass of 4.7 × 1011 M☉ based on a study published in 2018. It is offset by 15.5 kiloparsecs from the X-ray peak of the cluster.

References

External links J10405643–0103584 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 J10405643–0103584

Start with the simplest possible case. Write down what J10405643–0103584 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 J10405643–0103584 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 J10405643–0103584 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 J10405643–0103584

In research: J10405643–0103584 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 J10405643–0103584 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: J10405643–0103584 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Elliptical galaxies, Galaxy mergers, LEDA objects, so understanding it makes those chapters shorter.
In everyday life: Look for J10405643–0103584 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “J10405643–0103584” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study J10405643–0103584 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what J10405643–0103584 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 J10405643–0103584 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is J10405643–0103584 in simple terms?

Why does J10405643–0103584 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 J10405643–0103584?

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 J10405643–0103584.