astronomy

KMT-2024-BLG-0404L

KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L rather than just read about it. In short: KMT-2024-BLG-0404L (also known as OGLE-2024-BLG-0378L) is a low-mass red dwarf located in the direction of the Galactic Bulge at a distance of 23,510 light-years, or approximately 7,210 parsecs, in the constellation Sagittarius. Planetary system Around the star KMT-2024-BLG-0404L, two planetary-mass objects were discovered in 2025 using the gravitational microlensing method.

Key takeaways

KMT-2024-BLG-0404L belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect KMT-2024-BLG-0404L to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of KMT-2024-BLG-0404L from memory before moving on to harder problems.

Reference excerpt

KMT-2024-BLG-0404L (also known as OGLE-2024-BLG-0378L) is a low-mass red dwarf located in the direction of the Galactic Bulge at a distance of 23,510 light-years, or approximately 7,210 parsecs, in the constellation Sagittarius.

Planetary system

Around the star KMT-2024-BLG-0404L, two planetary-mass objects were discovered in 2025 using the gravitational microlensing method. The first component, designated KMT-2024-BLG-0404Lb, is an exoplanet with a mass of 17.3 Earth masses and a projected separation of 0.34 astronomical units. The second component of the system, designated KMT-2024-BLG-0404Lc, is a brown dwarf with a mass of 26 Jupiter masses. The projected separation between the star and the brown dwarf is 0.85 astronomical units from the star. To ensure dynamical stability in the system, the planet should orbit only one of the host stars, and the separation between the binary components must be considerably greater than the distance from the planet to its host. Based on the estimated masses of the lens components, the system is identified as a planetary system in which a Neptune-mass planet orbits within a binary consisting of a late M dwarf and a brown dwarf.

See also List of extrasolar planets KMTNet

References

Illustrations

Worked examples

Example 1 — a first encounter with KMT-2024-BLG-0404L

Start with the simplest possible case. Write down what KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L

In research: KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L 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: KMT-2024-BLG-0404L is common in secondary-school and first-year university syllabi. It links to neighbouring topics Brown dwarfs, Gravitational lensing, M-type main-sequence stars, so understanding it makes those chapters shorter.
In everyday life: Look for KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KMT-2024-BLG-0404L in simple terms?

Why does KMT-2024-BLG-0404L 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 KMT-2024-BLG-0404L?

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 KMT-2024-BLG-0404L.