astronomy

MOA-2011-BLG-262L

MOA-2011-BLG-262L 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 MOA-2011-BLG-262L rather than just read about it. In short: MOA-2011-BLG-262L is a red dwarf with an orbiting exoplanet, both detected through the gravitational microlensing event MOA-2011-BLG-262. The planetary system was once believed to be either an exoplanet with 3.2 times the mass of Jupiter and a exomoon with 0.47 times Earth's mass or a red dwarf with a mass of 0.11 solar masses orbited by a ~17 M🜨 planet, but the latter scenario was confirmed in 2024 based on observ…

Key takeaways

MOA-2011-BLG-262L belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect MOA-2011-BLG-262L to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of MOA-2011-BLG-262L from memory before moving on to harder problems.

Reference excerpt

MOA-2011-BLG-262L is a red dwarf with an orbiting exoplanet, both detected through the gravitational microlensing event MOA-2011-BLG-262. The planetary system was once believed to be either an exoplanet with 3.2 times the mass of Jupiter and a exomoon with 0.47 times Earth's mass or a red dwarf with a mass of 0.11 solar masses orbited by a ~17 M🜨 planet, but the latter scenario was confirmed in 2024 based on observations of the host star by the Keck telescope, 10 years after the microlensing event.

Planetary system

The system is located 24,400 light-years from Earth, in the constellation Sagittarius. The host star is a red dwarf, with 19% the Sun's mass and a faint apparent magnitude of 22.3 in the K-band. It has a transverse velocity of 541.3±65.75 km/s, the highest ever found for any star with a known exoplanet.

References

Worked examples

Example 1 — a first encounter with MOA-2011-BLG-262L

Start with the simplest possible case. Write down what MOA-2011-BLG-262L 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 MOA-2011-BLG-262L 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 MOA-2011-BLG-262L 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 MOA-2011-BLG-262L

In research: MOA-2011-BLG-262L 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 MOA-2011-BLG-262L 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: MOA-2011-BLG-262L is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 2013, Exoplanet stubs, Gravitational lensing, so understanding it makes those chapters shorter.
In everyday life: Look for MOA-2011-BLG-262L 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 MOA-2011-BLG-262L in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MOA-2011-BLG-262L 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 MOA-2011-BLG-262L out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is MOA-2011-BLG-262L in simple terms?

Why does MOA-2011-BLG-262L 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 MOA-2011-BLG-262L?

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 MOA-2011-BLG-262L.