astronomy

Upsilon3 Eridani

Upsilon3 Eridani 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 Upsilon3 Eridani rather than just read about it. In short: Upsilon3 Eridani (υ3 Eridani, abbreviated Upsilon3 Eri, υ3 Eri), officially named Beemim , is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 3.96 The distance to this star, based upon an annual parallax shift of 11.01 mas, is around 296 light-years.

Key takeaways

Upsilon3 Eridani belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Upsilon3 Eridani to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Upsilon3 Eridani from memory before moving on to harder problems.

Reference excerpt

Upsilon3 Eridani (υ3 Eridani, abbreviated Upsilon3 Eri, υ3 Eri), officially named Beemim , is a star in the constellation of Eridanus. It is visible to the naked eye with an apparent visual magnitude of 3.96 The distance to this star, based upon an annual parallax shift of 11.01 mas, is around 296 light-years. This is an evolved K-type giant star with a stellar classification of K4 III. It has about 54 times the radius of the Sun and radiates 426 times the solar luminosity from its outer atmosphere at an effective temperature of 3,990 K.

Nomenclature υ3 Eridani (Latinised to Upsilon3 Eridani) is the star's Bayer designation. This star bore the traditional name Beemim (also rendered Beemin, Theemim and Theemin -- see Theemin). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN approved the name Beemim for this star on 30 June 2017 and it is now so included in the List of IAU-approved Star Names. In Chinese, 天園 (Tiān Yuán), meaning Celestial Orchard, refers to an asterism consisting of Upsilon3 Eridani, Chi Eridani, Phi Eridani, Kappa Eridani, HD 16754, HD 23319, Theta Eridani, HD 24072, HD 24160, Upsilon4 Eridani, Upsilon2 Eridani and Upsilon1 Eridani. Consequently, the Chinese name for Upsilon3 Eridani itself is 天園十一 (Tiān Yuán shíyī, English: the Eleventh Star of Celestial Orchard).

References

Illustrations

Worked examples

Example 1 — a first encounter with Upsilon3 Eridani

Start with the simplest possible case. Write down what Upsilon3 Eridani 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 Upsilon3 Eridani 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 Upsilon3 Eridani 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 Upsilon3 Eridani

In research: Upsilon3 Eridani 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 Upsilon3 Eridani 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: Upsilon3 Eridani is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bayer objects, Bright Star Catalogue objects, Durchmusterung objects, so understanding it makes those chapters shorter.
In everyday life: Look for Upsilon3 Eridani 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 Upsilon3 Eridani in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Upsilon3 Eridani 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 Upsilon3 Eridani out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Upsilon3 Eridani in simple terms?

Why does Upsilon3 Eridani 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 Upsilon3 Eridani?

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 Upsilon3 Eridani.