Asteroid
Related Category: Astronomy: General
planetoid, or minor planet, small body orbiting the sun. More than 10,000 asteroids have orbits sufficiently well known to have been cataloged and named; thousands more exist.
Asteroids: the rocky debris of space
Asteroids, though neglected scientifically and publicly for a long time, have been the subject of much interest and debate over the past fifteen years.
asteroid belt
A region between the orbits of Mars and Jupiter where the majority of asteroids in the Solar System are to be found. The main asteroid belt extends from 2.15 to 3.
Asteroid Belt
The main asteroid belt is estimated to contain millions of objects and is located between the orbits of Mars and Jupiter.
Asteroids in unusual orbits
Although most asteroids travel in fairly circular orbits, there are notable exceptions.
Asteroid spectral types
Asteroids are assigned a type based on spectral shape, color, and sometimes albedo. These types are thought to correspond to an asteroid's surface composition.
Asteroids, Meteoroids, and Comets
Start with the name of any of the solar system objects listed in row 1. Find the path that takes you through correct descriptions of that object in each of the subsequent rows.
Asteroid squeaks past Earth in close approach
A mosaic of four images of the near-Earth asteroid Eros, taken by the NEAR probe on 14 February 2000.
Asteroids
A small, irregularly shaped object made of metal (iron and nickel), rocky materials, or a combination of the two that orbits the Sun or another planet.
Asteroids
On the first day of January 1801, Giuseppe Piazzi discovered an object which he first thought was a new comet. But after its orbit was better determined it was clear that it was not a comet but more like a small planet.
Asteroids
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Artist's depiction of the asteroid belt between Mars and Jupiter. Credit: David Minton and Renu Malhotra ...
asteroid
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Asteroid belt
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Asteroids are celestial bodies that are less than a planetoid, and are responsible for making up asteroid belts.
Asteroids and satellites swim through Tadpole Nebula
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ASTRONOMY NOW
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Asteroids, sometimes called minor planets or planetoids, are small Solar System bodies in orbit around the Sun, smaller than planets but larger than meteoroids....
s or minor planet
Minor planet ...
Above: Asteroid Ida imaged 28 August 1993 by the space probe "Galileo", on its way to Jupiter.
General Asteroid Information
Asteroids are small metallic, rocky lumps that orbit the sun but are not large enough to be considered planets. Asteroids lack an atmosphere.
Asteroid Braille
(Adapted from NASA Press Release 99-88)
Asteroid Braille (1992 KD) was discovered on May 27, 1992 by astronomers Eleanor Helin and Kenneth Lawrence using the 46 centimeter (18 inch) Shmidt telescope at Palomar Observatory, ...
Asteroids
Where They Are
The vast majority of asteroids are grouped in the asteroid belt, which is more like a loose grouping than a belt, and lies between 1.8 and 4.5 A.U.
Asteroids are pieces of metallic rock floating in space. Many asteroids are found in the the space between the orbits of the planets Mars and Jupiter. This space is known as the 'asteroid belt'.
Asteroids are rocky and metallic objects too small to be considered planets. They are sometimes called minor planets. They range in size from Ceres, with a diameter of about 1000 km, down to a few centimeters or less.
Asteroids whose orbits have been determined carefully enough so that their position on the sky as a function of time can be predicted are assigned permanent numbers and names by the .
Asteroids are left over materials from the formation of the Solar System. These materials were never incorporated into a planet because of their proximity to Jupiter's strong gravity.
How many asteroids are there?
Asteroid 4 Vesta, the brightest asteroid and the fourth largest. Vesta is the only asteroid that can be seen without a telescope (it is sixth magnitude).
The asteroid belt is a doughnut-shaped concentration of asteroids orbiting the Sun between the orbits of and , closer to the orbit of Mars, between 186 million to 370 million miles (300 million to 600 million km or 2 to 4 AU) from the Sun.
How many asteroids and meteoroids enter our atmosphere a day.
The Answer
The nominal flux of meteoroids with diameter 1 cm or larger is 10^-6 per square meter per year.
Many thousands of asteroids (or minor planets) circle the Sun, the majority of them streaming through the asteroid belt between the orbits of Mars and Jupiter.
Asteroid
Wikipedia, the free encyclopedia - Cite This Source
Asteroids, also called minor planets or planetoids, are a class of astronomical objects.
Asteroids
Asteroids are primoridal objects left over from the formation of the Solar System.
Asteroids More than 7,000 asteroids have been discovered. Several hundred more are discovered each year. There are undoubtedly hundreds of thousands more that are too small to be seen from Earth.
Asteroids
Figure 9. A view of an asteroid (named Braille) from the Earth.
Asteroids of the B, C, F, and G classes have low albedos and spectral reflectances similar to those of carbonaceous chondritic meteorites and assemblages produced by hydrothermal alteration and/or metamorphism of carbonaceous precursor materials.
Asteroids that can pass inside the orbit of Mars are said to be near-Earth asteroids. The near-Earth asteroids are subdivided into several classes.
Asteroid
A small solar system object composed mostly of rock. Many of these objects orbit the Sun between Mars and Jupiter. Their sizes range anywhere from 33 feet (10 meters) in diameter to less than 620 miles (1,000 kilometers).
Asteroid
This picture of the rocky asteroid 951 Gaspra was taken by NASA's Galileo spacecraft. Image Credit: NASA ...
Near Earth Asteroid 2002 NY40 passed just outside of the Moon's orbit in the morning ours of August 18, 2002.
Asteroids
Asteroids are rocky-metallic objects which range in size from about the size of pebbles to around 600 miles (~1,000 km) across. Although they orbit the Sun, they are too small to be considered planets.
Asteroids are relatively small, rocky objects that revolve around the Sun. Their name literally means "starlike bodies," but asteroids are definitely not stars. They are too small even to be classified as planets.
ASTEROID
ASTEROID, one of the many small or minor planets that are members of the solar system and that move in elliptical orbits primarily between the orbits of Mars and Jupiter.
Sizes and Orbits
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Asteroid: Any of the thousands of small rocky objects that orbit around the Sun, most of them between the orbits of Mars and Jupiter (although some pass closer to the Sun that Earth does and others have orbits that take them well beyond Jupiter).
Asteroids
Another name for asteroid is minor planet. Most of them are found in the gap between Mars and Jupiter.
Asteroids
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Asteroid
a small planetary body in orbit around the Sun, larger than a meteoroid but smaller than a planet. Most asteroids can be found in a belt between the orbits of Mars and Jupiter.
asteroids:
Small bodies of rocky composition. Unlike comets, they do not liberate gasses and dust due to the solar heat
Atens:
NEO sub-population with semi major axis smaller than 1 AU and aphelion distance larger than 0.983 AU.
Asteroids with opposition magnitudes 9 or brighter during 2010
Asteroid Opposition date Magnitude Range of dates brighter than 9.5
(4) Vesta
6.1 ...
Asteroid: A small, mostly rocky body orbiting the Sun. Asteroids range in size from 1000 kilometers in diameter to tiny objects you could hold in your hand.
Asteroids
Dwarf Planets: A New Way of Thinking About an Old Solar System (PDF, 315 KB)
Meteorites ...
Asteroid See Minor Planet.
Astronomical unit The average distance from Earth to the Sun, approximately 149.6 million km, which equals 1 AU.
asteroid: Small rocky world; most asteroids lie between Mars and Jupiter in the asteroid belt.
astronomical unit (AU): Average distance from Earth to the sun; 1.5 x 108 km, or 93 x 106 miles.
Asteroids
Small Rocky worlds, most of which lie between Mars and Jupiter in the asteroid belt.
Astrometric Binary ...
Asteroid Belt - The region of the solar system lying between 2.1 and 3.3 astronomical units (AU) from the Sun. The great majority of asteroids are found in the asteroid belt ...
Asteroids. One of several names for the minor planet swarms of the Solar System. Asteroids are found in many regions of the solar system but most are to be found orbiting the Sun between the orbits of Mars and Jupiter.
asteroid belt
the zone in which most asteroids orbit the sun, located between the orbits of Mars and Jupiter
astrometry ...
ASTEROID - Metallic, rocky bodies without atmospheres that orbit the Sun but are too small to be classified as planets.
Asteroid
(a) A small rocky body that orbits a star. In the Solar System, most asteroids lie between the orbits of Mars and Jupiter. The largest asteroid is Ceres, about 900 kilometers in diameter.
The Asteroids
Asteroids, or minor planets, orbit the Sun mostly between Mars and Jupiter. They are covered in the next section following the Planets.
The Jovian Planets ...
see Asteroid [H76]
Mintaka
One of the three stars in Orion's belt, and the star along whose line of sight interstellar gas was first spectroscopically detected. [C95]
Minute of Arc ...
Trojan Asteroids
As of 2005, there are two known Trojan asteroids of Neptune which have the same orbital period as the planet. They lie in the elongated, curved regions around the L4 and L5 Lagrangian points 60° ahead of and behind Neptune.
Asteroid moons are asteroids that orbit larger asteroids. They are not as clearly distinguished as planetary moons, sometimes being almost as large as their partner.
 See also: Planet, Earth, Orbit, Solar, Sun
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