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List of asteroid close approaches to Earth in 2024

List of asteroid close approaches to Earth in 2024 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 2024 rather than just read about it. In short: Below is the list of asteroids that have come close to Earth in 2024. Timeline of known close approaches less than one lunar distance from Earth A list of the 145 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2024, 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 2024.

Timeline of known close approaches less than one lunar distance from Earth A list of the 145 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2024, 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 in 2024 was that of 2024 XA, an asteroid with a diameter of 1.2–2.8 m (3.9–9.2 ft), at 7,726 km (4,801 mi; 5.165×10−5 AU; 0.02010 LD) from the center of the Earth, or 1,350 km (840 mi) above its surface. The largest asteroid to pass within 1 LD of Earth in 2024 was 2024 MK at 100–230 m (330–750 ft) in diameter, for an absolute magnitude of 22.0. The fastest asteroid to pass within 1 LD of Earth in 2024 was 2024 CH4 that passed Earth with a velocity with respect to Earth of 24.01 km/s (53,700 mph), while the slowest bypass within lunar distance was that of 2024 VO at a velocity with respect to Earth of 3.08 km/s (6,900 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 2024. This list and relevant databases do not consider impacts as close approaches, thus this list does not include 2024 BX1, 2024 RW1, 2024 UQ and 2024 XA1, asteroids which were predicted to impact on Earth and burned up in its atmosphere, as well as several more objects that collided with Earth's atmosphere in 2024 which weren't 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 Among asteroids observed during a close approach beyond one lunar distance, 2024 ON (which passed at 0.006682 AU (2.600 LD) on 17 September 2024) was noteworthy as a contact binary with a diameter of 350 m (1,150 ft) imagined by radar. Below is an example list of near-Earth asteroids discovered prior to 2024 that were predicted to pass more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2024.

See also List of asteroid close approaches to Earth List of asteroid close approaches to Earth in 2023 List of asteroid close approaches to Earth in 2025 Asteroid impact prediction

References

Worked examples

Example 1 — a first encounter with List of asteroid close approaches to Earth in 2024

Start with the simplest possible case. Write down what List of asteroid close approaches to Earth in 2024 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 2024 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 2024

In research: List of asteroid close approaches to Earth in 2024 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 2024 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 2024 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 2024 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 2024 in simple terms?

Below is the list of asteroids that have come close to Earth in 2024. Timeline of known close approaches less than one lunar distance from Earth A list of the 145 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2024, based…

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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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