astronomy

SDSS J092048.27+302818.3

SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3 rather than just read about it. In short: SDSS J092048.27+302818.3 also known as OGC 330 and SHELS J140.2012763+30.4717820 is a elliptical galaxy located in the constellation of Cancer. The redshift of the galaxy is (z) 0.288.

Key takeaways

SDSS J092048.27+302818.3 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SDSS J092048.27+302818.3 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSS J092048.27+302818.3 from memory before moving on to harder problems.

Reference excerpt

SDSS J092048.27+302818.3 also known as OGC 330 and SHELS J140.2012763+30.4717820 is a elliptical galaxy located in the constellation of Cancer. The redshift of the galaxy is (z) 0.288. SDSS J092048.27+302818.3 is a massive elliptical galaxy of Type E morphology, residing as the brightest cluster galaxy of the GMBCG J140.20117+30.47176 galaxy cluster. The total R-band magnitude of the galaxy has been estimated to be 16.903 ± 0.001 while its total stellar mass is calculated to be 11.89+0.06−0.08 M☉. The total half-light radius of the galaxy has been estimated to be 2.7396 ± 0.0058 or 4.25 arcseconds while the axial ratios is calculated to be 0.9278 ± 0.0009. Evidence also found it is an early-type galaxy shown lensing an emission-line galaxy located in the background with a redshift of (z) 0.3918. The stellar velocity dispersion of the galaxy itself is 297 ± 17 kilometers per seconds while the major axis position angle of the galaxy is 30°. The total AB magnitude is 16.25. A study published in 2022 has recalculated the stellar mass of the galaxy as 11.786+0.092−0.120 M☉.

References

External links SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3

Start with the simplest possible case. Write down what SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3

In research: SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3 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: SDSS J092048.27+302818.3 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cancer (constellation), Elliptical galaxies, Gravitational lensing, so understanding it makes those chapters shorter.
In everyday life: Look for SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSS J092048.27+302818.3 in simple terms?

SDSS J092048.27+302818.3 also known as OGC 330 and SHELS J140.2012763+30.4717820 is a elliptical galaxy located in the constellation of Cancer. The redshift of the galaxy is (z) 0.288.

Why does SDSS J092048.27+302818.3 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 SDSS J092048.27+302818.3?

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 SDSS J092048.27+302818.3.