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LEDA 74886

LEDA 74886 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 LEDA 74886 rather than just read about it. In short: LEDA 74886, also known by its 2MASX designation 2MASX J03404323-1838431, and sometimes known as the Emerald-cut Galaxy, is a dwarf galaxy with a rare rectangular shape. It is located at a distance of about 70,000,000 light-years (21 Mpc) in the Eridanus constellation.

LEDA 74886 — main illustration
LEDA 74886 — illustration

Key takeaways

  • LEDA 74886 belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect LEDA 74886 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of LEDA 74886 from memory before moving on to harder problems.

Reference excerpt

LEDA 74886, also known by its 2MASX designation 2MASX J03404323-1838431, and sometimes known as the Emerald-cut Galaxy, is a dwarf galaxy with a rare rectangular shape. It is located at a distance of about 70,000,000 light-years (21 Mpc) in the Eridanus constellation. The galaxy was detected in a wide field of view image taken by the Subaru Telescope using the Subaru Prime Focus Camera (Suprime-Cam). Using the Keck Telescope, a thin disc with a side on orientation was confirmed to be lurking at the center of LEDA 74886, and spinning at a speed of 33 km/s at the orbital radius of half a kpc. LEDA 74886 has a mass of around 109 M☉ (Compared to the Milky Way's mass of about 1012 M☉).

Location LEDA 74886 is located in the celestial sphere at a right ascension ( α {\displaystyle \alpha } ) of 03h 40m 43.2s, and a declination ( δ {\displaystyle \delta } ) of −18° 38′ 43″ (J2000). It is located within the Galactic corona of NGC 1407, a massive spherical galaxy which is located approximately 163,000 ly (50 kpc) to the northwest of LEDA 74886.

See also SDSS J074018.17+282756.3 is a spiral galaxy with arms that have a somewhat squarish-looking interior, but is distinct from LEDA 74886, because LEDA 74886 has no apparent spiral structure and a boxy like exterior form. Sextans A, a member of the local group, has a box like form due to its expanding shell of young blue stars, but it has a much lower mass and density, and includes a central disc which LEDA 74886 does not include. NGC 4488

References

Illustrations

LEDA 74886 illustration
LEDA 74886: A color cut-out image of LEDA 74886
A color cut-out image of LEDA 74886

Worked examples

Example 1 — a first encounter with LEDA 74886

Start with the simplest possible case. Write down what LEDA 74886 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 LEDA 74886 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 LEDA 74886 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 LEDA 74886

In research
LEDA 74886 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 LEDA 74886 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
LEDA 74886 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Eridanus (constellation), LEDA objects, Lenticular galaxies, so understanding it makes those chapters shorter.
In everyday life
Look for LEDA 74886 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 LEDA 74886 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what LEDA 74886 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain LEDA 74886 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LEDA 74886 in simple terms?

LEDA 74886, also known by its 2MASX designation 2MASX J03404323-1838431, and sometimes known as the Emerald-cut Galaxy, is a dwarf galaxy with a rare rectangular shape. It is located at a distance of about 70,000,000 light-years (21 Mpc) in the Eridanus constellation.

Why does LEDA 74886 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 LEDA 74886?

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 LEDA 74886.

Tags

  • Eridanus (constellation)
  • LEDA objects
  • Lenticular galaxies

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