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An asteroid is anything greater that 10 meters across that orbits the Sun
A meteoroid is a sand- to boulder-sized particle of debris in the Solar System.
The visible path of a meteoroid that entersEarth's (or another body's) atmosphere is called a meteor, or colloquially a shooting star or falling star. If a meteoroid reaches the ground and survives impact, then it is called a meteorite (or bolide as a flash in the sky).
The largest, and the first discovered asteroid, is Ceres with a diameter of about 900km (larger than the dwarf planet Pluto).
The asteroid that is assumed to have devastated the dinosaurs and created the Chicxulub crater was about 10km in diameter.
The biggest asteroids are about 500 miles in length; any larger, and their mass and internal gravity would cause them to collapse into a nearly spherical shape and reach "hydrostatic equilibrium". This is one of the criteria that the International Astronomical Union has set for "dwarf planet" status.
I'm not aware of a minimum size for an asteroid; space rocks that have made fairly close passes by the Earth have been described by NASA as being asteroids, even though their size was measured in mere feet. So you could consider any space object that's visible (before it hits the Earth's atmosphere and becomes a meteor) as an asteroid.
The size of asteroids can vary and the largest asteroid, Ceres, is about 583 miles in diameter. Other asteroids are about 20 feet in diameter while many in the asteroid belt between Jupiter and Mars are larger than 60 miles in diameter.
The largest asteroid is Ceres, which is really now classed as a Dwarf Planet since it is just about massive enough to hold an elipsoid shape under its own gravity. It may also be referred to an asteroid though as it is part of the asteroid belt. This has a diameter of around 975km. there are two other fairly large asteroids known as Pallas and Vesta. these are around 500km in diameter, but have more irregular shapes. The smaller ones can be as small as you like, but obviously you wont be able to detect them down to a certain size or distance.
When the mass of the asteroid is great enough that its own gravity crushes it into a spherical shape, then technically we ought to call it a "dwarf planet" rather than an asteroid. But this definition is fairly new, and many objects that we call "asteroids" are bigger than that.
Ceres used to be considered an asteroid, but the 2006 IAU convention redefined it as a "dwarf planet". I suppose Vesta is the next largest.
Vesta is about 530 KM in size, but isn't spherical; it is more "bean" shaped. Because it isn't spherical, it cannot be considered a "dwarf planet".
The term "asteroid" can be applied to any space rock big enough to be visible while in space, but too small to be crushed into a spherical shape by its own gravity. If the space rock IS massive enough to become spherical because of its gravity, then it qualifies as a "dwarf planet" at least.
So the body called Ceres _used to be_ called an asteroid, because it was in the asteroid belt, but it is now considered a "dwarf planet". The slightly smaller body named Vesta is still an asteroid.
On the low end, there have been some fairly small rocks - in the tens of meters size - that NASA has called "asteroid".
Asteroid Apophis is approximately 340 meters (1,120 feet) in diameter.
There isn't really a meaningful "average". Asteroids range in size from almost-planets to mere space rocks. I'm not sure that there is a minimum official size for an "asteroid".
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Is apophis a planet?
No. Apophis is an asteroid about the size of a skyscraper.
Who named Apophis the Red Meteor in 1992?
Apophis the Red Meteor was named by American scientists in 1992 after the ancient Egyptian god of chaos and destruction known as Apophis. The name was chosen to reflect the potential danger posed by the asteroid's close approach to Earth.
What is the meaning of the name apophis?
Apophis is a name derived from ancient Egyptian mythology, referring to a serpent or snake deity associated with chaos and destruction. It is often depicted as a symbol of evil and darkness in Egyptian lore.
Is apophis real?
Yes, Apophis is real, but it is not a physical entity. Apophis is a near-Earth asteroid that gained attention due to its close approach to Earth in 2029 and 2036. Scientists are monitoring its trajectory to assess any potential impact risks.
Is there a 2012 asteroid?
There was no significant asteroid impact in 2012. However, an asteroid named Apophis drew attention due to its close approach to Earth in that year, although the probability of impact was extremely low.
Is apophis a planet?
No. Apophis is an asteroid about the size of a skyscraper.
Is the meteor apophis blue?
The asteroid Apophis is not blue. It is dark in color, likely a mixture of rock and metal, similar to other asteroids in our solar system.
The name of a asteroid and a recent movie?
Asteroid: 99942 Apophis Movie: "Armageddon"
What is the probability the asteroid 99942 Apophis will strike earth?
The answer to this can be found in the links I will place below.
Is 99942 Apophis a comet or meteor?
Neither; Apophis is an asteroid, and not especially large. It would bear no mention at all, except for the fact that on Friday, April 13, 2029 it will come within about 20,000 miles of the Earth, closer than the orbit of geosynchronous satellites. But it will miss.
How many life species will died out when if apophis hit the earth in 2029 or 2036?
about 60 or 70% of life species plus humans will died out when if the asteroid apophis when if hit the earth that asteroid is size of manhattan same size which killed off the dinosaurs
How big of crater would 99942 apophis asteroid make?
The impact of asteroid Apophis, which is about 340 meters in diameter, would create a crater up to 5-6 kilometers in diameter if it were to hit Earth. The exact size would depend on various factors such as the asteroid's density, speed, and angle of impact.
What is the name of the asteroid that will be near earth in 2029?
99942 Apophis is an asteroid where initial observations indicated a small probability (up to 2.7%) that it would strike the Earth in 2029.Later observations concluded that the asteroid would miss the Earth.The chances are now set at a one in 3 million that it will hit Earth.
Who named Apophis the Red Meteor in 1992?
Apophis the Red Meteor was named by American scientists in 1992 after the ancient Egyptian god of chaos and destruction known as Apophis. The name was chosen to reflect the potential danger posed by the asteroid's close approach to Earth.
How can you destroy apophis?
Apophis is an asteroid that might come close to Earth in 2068, but destroying it is not currently a feasible or safe option. The best approach is to track its trajectory closely and, if necessary, use deflection techniques to alter its path away from Earth.
What is the meaning of the name apophis?
Apophis is a name derived from ancient Egyptian mythology, referring to a serpent or snake deity associated with chaos and destruction. It is often depicted as a symbol of evil and darkness in Egyptian lore.
Is apophis real?
Yes, Apophis is real, but it is not a physical entity. Apophis is a near-Earth asteroid that gained attention due to its close approach to Earth in 2029 and 2036. Scientists are monitoring its trajectory to assess any potential impact risks.
