science

List of asteroid close approaches to Earth in 2025

List of asteroid close approaches to Earth in 2025 is a science 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 List of asteroid close approaches to Earth in 2025 rather than just read about it. In short: Below is the list of asteroids that have come close to Earth in 2025. Timeline of known close approaches less than one lunar distance from Earth A list of the 189 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2025, based on the close approach database of the Center for Near-Earth Object Studies (CNEOS).

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Reference excerpt

Below is the list of asteroids that have come close to Earth in 2025.

Timeline of known close approaches less than one lunar distance from Earth A list of the 189 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2025, based on the close approach database of the Center for Near-Earth Object Studies (CNEOS). For reference, the radius of Earth is about 0.0000426 AU (0.0166 LD; 6,370 km; 3,960 mi). Geosynchronous satellites have an orbit with semi-major axis length of 0.000282 AU (0.110 LD; 42,200 km; 26,200 mi). The closest approach of Earth by an asteroid (technically a meteoroid) was that of 2025 UC11, which has a diameter of 0.41–0.93 m (1.3–3.1 ft). 2025 UC11 approached at about 6,599 km (4,100 mi; 4.411×10−5 AU; 0.01717 LD) from the center of the Earth, or 221 km (137 mi) above its surface. The largest asteroid to pass within 1 LD of Earth in 2025 was 2025 RM1 at 31–69 m (102–226 ft) in diameter, for an absolute magnitude of 24.7. The fastest asteroid to pass within 1 LD of Earth in 2025 was 2025 WM20 that passed Earth with a velocity with respect to Earth of 28.36 km/s (63,400 mph), while the slowest bypass within lunar distance was that of 2025 KX2 at a velocity with respect to Earth of 3.13 km/s (7,000 mph). The CNEOS database of close approaches lists some close approaches a full orbit or more before the discovery of the object, derived by orbit calculation. The list below only includes close approaches that are evidenced by observations, thus the pre-discovery close approaches would only be included if the object was found by precovery, but there was no such close approach in 2025. This list and the relevant databases do not consider impacts as close approaches, thus this list does not include any of the objects that collided with Earth's atmosphere in 2025, none of which were discovered in advance, but were observed visually or recorded by infrasound sensors designed to detect detonation of nuclear devices. Rows highlighted red indicate objects which were not discovered until after closest approach Rows highlighted yellow indicate objects discovered less than 24 hours before closest approach Rows highlighted green indicate objects discovered more than one week before closest approach Rows highlighted turquoise indicate objects discovered more than 7 weeks before closest approach Rows highlighted blue indicate objects discovered more than one year before closest approach(i.e. objects successfully cataloged on a previous orbit, rather than being detected during final approach)

Warning times by size This sub-section visualises the warning times of the close approaches listed in the above table, depending on the size of the asteroid. The sizes of the charts show the relative sizes of the asteroids to scale. For comparison, the approximate size of a person is also shown. This is based the absolute magnitude of each asteroid, an approximate measure of size based on brightness. Absolute magnitude H ≥ 30 (smallest)

(size of a person for comparison)

Absolute magnitude 30 > H ≥ 29

Absolute magnitude 29 > H ≥ 28

Absolute magnitude 28 > H ≥ 27

Absolute magnitude 27 > H ≥ 26

Absolute magnitude 26 > H ≥ 25

Absolute magnitude 25 > H (largest)

Notes

Beyond 1 LD Astronomers are also tracking close approaches of larger asteroids beyond one lunar distance, which provides them with an opportunity to study these objects with radar. Examples will be added below.

See also List of asteroid close approaches to Earth List of asteroid close approaches to Earth in 2024 Asteroid impact prediction

References

Worked examples

Example 1 — a first encounter with List of asteroid close approaches to Earth in 2025

Start with the simplest possible case. Write down what List of asteroid close approaches to Earth in 2025 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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

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Example 3 — an exam-style question

Typical questions about List of asteroid close approaches to Earth in 2025 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 List of asteroid close approaches to Earth in 2025

In research: List of asteroid close approaches to Earth in 2025 appears in science 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 List of asteroid close approaches to Earth in 2025 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: List of asteroid close approaches to Earth in 2025 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Earth-crossing asteroids, Lists of asteroids, Near-Earth asteroids, so understanding it makes those chapters shorter.
In everyday life: Look for List of asteroid close approaches to Earth in 2025 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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Frequently asked questions

What is List of asteroid close approaches to Earth in 2025 in simple terms?

Below is the list of asteroids that have come close to Earth in 2025. Timeline of known close approaches less than one lunar distance from Earth A list of the 189 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2025, based…

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Because it connects several science 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 List of asteroid close approaches to Earth in 2025?

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.

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