Near Earth asteroid

Near Earth asteroid - Factbites
Where results make sense
About us | Why use us? | Reviews | PR | Contact us

Topic: Near Earth asteroid

Note: these results are not from the primary (high quality) database.

In the News (Sun 29 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Near-Earth asteroid - Wikipedia, the free encyclopedia
		Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earth's orbit.
		Asteroid (29075) 1950 DA was lost after its discovery in 1950 since not enough observations were made to allow plotting its orbit, and then rediscovered on December 31, 2000.
		On June 6, 2002 an object with an estimated diameter of 10 metres collided with Earth.
	en.wikipedia.org /wiki/Near-Earth_asteroid (1544 words)

	Crosser
		Jupiter-crosser asteroid A Jupiter-crosser asteroid is an Trojans are inner grazers (105), outer grazers (52), co-orbita...
		Mercury-crosser asteroid A Mercury-crosser asteroid is an Mercury.
		Venus-crosser asteroid A Venus-crosser asteroid is an Mercury-crossers or grazers are marked ).
	www.brainyencyclopedia.com /topics/crosser.html (1544 words)

	Near Shoemaker - Near Earth Asteroid Rendezvous
		The NEAR Shoemaker spacecraft was originally known as NEAR (Near Earth Asteroid Rendezvous) and was renamed by NASA on March 14, 2000 in honour of geologist Gene Shoemaker.
		NEAR Shoemaker was the first spacecraft to orbit around an asteroid, the first to land on an asteroid and the first solar powered spacecraft to travel beyond the orbit of Planet Mars.
		Near Shoemaker achieved all of its science goals during the year in orbit and conducted the first long-term close-up study of an asteroid.
	www.aerospaceguide.net /spacecraft/near.html (986 words)

	Near Earth Asteroid Tracking - Wikipedia, the free encyclopedia
		Near Earth Asteroid Tracking (NEAT) is a program run by NASA and Jet Propulsion Laboratory to discover near-Earth objects.
		In addition to discovering thousands of asteroids, NEAT is also credited with the co-discovery (recovery) of periodic comet 54P/de Vico-Swift-NEAT and of the high proper motion Teegarden's star.
		This is the telescope that produced the images leading to the discovery of 50000 Quaoar in 2002, and 90377 Sedna in 2003 (published 2004).
	en.wikipedia.org /wiki/Near-Earth_Asteroid_Tracking (266 words)

	Near Earth Asteroid Rendezvous (NEAR)
		The ultimate goal of the mission is to rendezvous with and achieve orbit around the near Earth asteroid 433 Eros in February, 1999, and study the asteroid for approximately one year.
		Launched on February 17, 1996, the Near Earth Asteroid Rendezvous (NEAR) mission is to be the first of NASA's Discovery missions, a series of small-scale spacecraft designed to proceed from development to flight in under three years for a cost of less than $150 million.
		A radio science experiment will also be performed using the NEAR tracking system to estimate the gravity field of the asteroid.
	www.solarviews.com /eng/near.htm (261 words)

	1) What are comets and asteroids ?
		Its goal is to help protect Earth's environment from the impacts of asteroids and comets by promoting and coordinating discovery programs and physical studies of Near-Earth objects (NEOs).
		The Earth, and all the other planets in the solar system, have been continuously pelted by asteroids and comets ever since their formation.
		It is now known that an asteroid impact caused at least one mass extinction of life on Earth -- the one that wiped out the dinosaurs.
	neat.jpl.nasa.gov /neofaq.html (1708 words)

	Amor asteroid - Wikipedia, the free encyclopedia
		The Amor I subgroup consists of Amor asteroids whose semi-major axes are in between Earth and Mars.
		Amor I asteroids that have semi-major axes very close to Earth's (such as 1992 JD) can be considered Arjuna asteroids because they have very low eccentricities and thus Earth-like orbits.
		Although by definition no Amor asteroid actually currently crosses the Earth's orbit (see Earth-crosser asteroid), the definition of an Earth-crossing asteroid (ECA) is broad enough so that many, if not most, Amor asteroids are also ECAs.
	en.wikipedia.org /wiki/Amor_asteroid (1708 words)

	Amor asteroid - Iridis Encyclopedia
		Amor I asteroids that have semi-major axes very close to Earth's (such as 1992 JD) can be considered Arjuna asteroids because they have very low eccentricities and thus Earth-like orbits.
		The Amor I subgroup consists of Amor asteroids whose semi-major axes are in between Earth and Mars.
		Asteroids that get close to the Earth whose orbits are inside the Earth are considered Apohele asteroids (although not all Apohele's necessarily get close to the Earth).
	www.iridis.com /dodoro/n1/Amor_asteroid (1708 words)

	NEAR Shoemaker - Wikipedia, the free encyclopedia
		The Earth gravity assist swingby occurred on January 23, 1998 at 7:23 UT. The closest approach was 540 km, altering the orbital inclination from 0.5 to 10.2 degrees, and the aphelion distance from 2.17 to 1.77 AU, nearly matching those of Eros.
		After launch on a Delta 7925-8 (a Delta II Lite launch vehicle with nine strap-on solid-rocket boosters and a Star 48 (PAM-D) third stage) and exit from Earth orbit, NEAR entered the first part of its cruise phase.
		A rendezvous maneuver was performed on January 3, 1999 involving a thruster burn to match NEAR's orbital speed to that of Eros.
	en.wikipedia.org /wiki/NEAR_Shoemaker (1452 words)

	Asteroid 1995CR
		The near-Earth asteroid 1995CR, which holds the current record for closest approach to the Sun, was video-taped on the night of February 20th 1995 by Dr George Jacoby of Kitt Peak National Observatory (KPNO) and Dr Robert Jedicke of the University of Arizona Lunar and Planetary Laboratory, the asteroid's discoverer.
		The asteroid was discovered during the course of a dedicated detection program for Near Earth asteroids at the Steward Observatory 0.9-meter telescope on Kitt Peak mountain.
		In the second slightly longer extract (90 seconds, 2.7 Mbytes, a few minutes later), the asteroid is in the lower center of the screen, almost directly down from the bright star, and moves off to the left, passing "across" the star in the bottom left corner.
	www.noao.edu /asteroid/asteroid.html (488 words)

	Near-Earth Asteroid 3753 Cruithne
		The near-Earth asteroid 3753 Cruithne is in an unusual orbit about that of the Earth, one which is known in the lingo of celestial mechanics as being co-orbital with the Earth (meaning it shares the Earth's orbit with it) and, more particularly, as being of the "horseshoe" type.
		Also note that the presence of the Earth at the centre of the kidney is simply a result of their mutual synchronization: the Earth is lined up with the asteroid and Sun when the asteroid is at perihelion (its closest approach to the Sun).
		The Earth is a large truck moving at a constant speed down the centre lane and the asteroid is a car.
	www.astro.uwo.ca /~wiegert/3753/3753.html (2229 words)

	ScienceDaily: Near-Earth Asteroid Is Two Chunks In One
		Asteroid Found By Spacewatch Is Fastest Spinning Solar System Object (July 23, 1999) -- A unique near-Earth asteroid discovered last year by the University of Arizona Spacewatch is the fastest spinning solar system object yet found, an international team of scientists report in the July...
		Cosmic Near Misses Hit The Scientific Bullseye (August 17, 1998) -- NASA announced the discovery of two new Near Earth Asteroids on Aug. 6, 1998.
		Asteroid belt -- The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be...
	www.sciencedaily.com /releases/2001/05/010531081601.htm (1261 words)

	Press Release ING 3/2002. A SHARPER LOOK AT NEAR EARTH ASTEROID 2002 NY40.
		Near Earth Asteroids are a small population of asteroids that periodically approach or intersect the orbit of our planet, and have the possibility of colliding with the Earth as probably happened 65 million years ago, ending the dinosaur era.
		The Near Earth Asteroid 2002 NY40 was observed with the William Herschel Telescope on La Palma, Canary Islands, on the night of August 17 to 18, 2002.
		During these observations the asteroid was 750,000 kilometres away, twice the distance to the Moon, and moving very rapidly across the sky (crossing a distance similar to the diameter of the Moon in 6 minutes or at 65,000 kilometres per hour).
	www.ing.iac.es /PR/press/ing32002.html (780 words)

	CNN.com - Whew! Stealth asteroid nearly blindsides Earth - March 19, 2002
		The object, slightly larger than one that flattened a vast expanse of Siberia in 1908, was one of the 10 closest known asteroids to approach Earth, astronomers said.
		Like its larger siblings, asteroid 2002 EM7 follows an elliptical orbit with an extremely low risk of Earth collision in the coming decades or centuries.
		The space boulder passed Earth within 288,000 miles (461,000 kilometers) -- or 1.2 times the distance to the moon-- on March 8, but since it came from the direction of the sun, scientists did not observe it until four days later.
	archives.cnn.com /2002/TECH/space/03/19/asteroid.blindside (444 words)

	DISCOVERY ::: MISSIONS ::: NEAR
		On February 14, 2000, the NEAR Shoemaker spacecraft began its year-long orbit of asteroid Eros determine its mass, structure, geology, composition, gravity, and magnetic field.
		On February 17, 1996, NEAR was the first Discovery Program spacecraft to be launched and it became the first ever to orbit and land on an asteroid.
		Utilizing six highly specialized instruments to gather data about its primary target, asteroid 433 Eros, the NEAR mission was designed to answer many fundamental questions about the nature and origin of asteroids and comets.
	discovery.nasa.gov /near.html (659 words)

	Near Earth Asteroid
		Near-Earth Asteroid 2001 YB5 passed the Earth on January 7 at a distance of 830,000 km, generating considerable interest in the international press.
		This asteroid is estimated to be the size of the largest shopping centers (including the parking lots).
		If it ever does hit our planet, an asteroid of this size would excavate a crater (on land) the size of a small city, and the blast would cause considerable damage on the scale of a country like France.
	www.ifa.hawaii.edu /tops/neo02.html (249 words)

	NEAR-EARTH ASTEROID TRACKING
		Amors, Apollos, and Atens are the three categories of Near-Earth* asteroids (NEAs).
		At both sites the NEAT cameras use 1.2-m (48") telescopes to find Near-Earth objects (NEOs), both Near-Earth asteroids (NEAs) and comets.
		Amor asteroids approach the Earth's orbit from the outside, Apollo asteroids cross the Earth's orbit, and Aten asteroids approach the Earth's orbit from the inside.
	neat.jpl.nasa.gov (196 words)

	Near Earth Asteroid Rendezvous
		The Near Earth Asteroid Rendezvous (NEAR) mission is the first launch in the Discovery Program, an initiative of NASA for small planetary missions.
		As the first spacecraft to orbit an asteroid, NEAR promises to provide observations that will be invaluable towards answering fundamental questions about the nature and origin of near-Earth objects, such as the numerous asteroids and comets in the vicinity of Earth's orbit.
		The NEAR mission objective is to orbit an asteroid for a year and collect data from a suite of sensors.
	www-geodyn.mit.edu /near.html (337 words)

	near-Earth asteroid
		There are three main groups: the Aten group (which stays mainly inside Earth’s orbit), the Apollo group (which crosses Earth’s orbit), and the Amor group (which orbits mostly between Earth and Mars).
		Because these asteroids travel in orbits that cross or approach Earth’s orbit, some of them can, occasionally, pass relatively close to our planet or even threaten to collide with it.
		Asteroid shaves past Earth's atmosphere (Aug 24, 2004)
	www.daviddarling.info /encyclopedia/N/near-Earth_asteroid.html (227 words)

	Near Earth Asteroid - Near Earth Object
		Most Near Earth Asteroids are believed to be main belt asteroids that were knocked out of the belt by collisions with other asteroids and/or by the gravitational forces of Jupiter.
		The orbits of near Earth asteroids are thought to be influenced by gravitational interactions with the Sun or terrestrial planets or by collisions with other bodies.
		Asteroids are believed to be remnants from the formation of the inner planets, including Earth.
	www.aerospaceguide.net /nearearthasteroids.html (485 words)

	Asteroid 4179 Toutatis
		Asteroid 4179 Toutatis (formerly 1989 AC) was discovered by C. Pollas on January 4, 1989, at Caussols, France, on photographic plates taken on the 0.9-m Schmidt telescope by Alain Maury and Derral Mulholland during astrometric observations of Jupiter's faint satellites.
		The inversion solved for the asteroid's shape and inertia tensor, their orientation with respect to each other, initial conditions for the asteroid's spin and orientation, the radar scattering properties of the surface, and the projected location of the asteroid's center of mass in each frame.
		Hudson and Ostro (1995, hereafter HO95) used a comprehensive physical model to invert the lower-resolution images to estimate the asteroid's detailed shape and inertia tensor, initial conditions for the asteroid's spin and orientation, the radar scattering properties of the surface, and the delay-Doppler trajectory of the center of mass.
	echo.jpl.nasa.gov /asteroids/4179_Toutatis/toutatis.html (485 words)

	Earth-Crossing Asteroids
		listing of asteroids that come near the Earth and their orbital elements (the orbital elements allow their orbit to be plotted with the
		On February 22, 1995 (2 1/2 weeks after discovery), this asteroid passed within 7.5 million km of the Earth---a distance only 20 times that of the distance to the Moon (note that in the animation the sizes of the planetary disks and of the asteroid are greatly exaggerated).
		This asteroid is of a relatively rare type with an orbital period much faster than that of the Earth.
	csep10.phys.utk.edu /astr161/lect/asteroids/collisions.html (485 words)

	Spaceguard Survey: Chapter 3
		The near-Earth asteroids are categorized as Amors, Apollos, and Atens, according to whether their orbits lie outside that the Earth, cross that of the Earth with period greater than 1 year, or cross that of the Earth with period less than 1 year (see the Glossary for precise definitions of these and other technical terms).
		The opportunity for a similar study of a near-Earth asteroid will depend on approval of the NASA Discovery line of small planetary missions, the first of which is to be an asteroid rendezvous.
		An ECA is defined rigorously (Shoemaker 1979, 1990) as an object moving on a trajectory that is capable of intersecting the capture cross-section of the Earth as a result of on-going long-range gravitational perturbations due to the Earth and other planets.
	home.earthlink.net /~kstengel226/astro/spacegrd/sg_3.html (485 words)

	Planetary Society: Earth-Crossing Asteroid
		Asteroid 2001 OG108 may be the biggest Earth-crossing asteroid ever discovered.
		Members of this group, named after asteroid 5335 Damocles - the first of its type to be discovered - have elliptical orbits that resemble those of short period comets.
		Since 2001 OG108 is the brightest all the Damocloid asteroids, it must be the largest.
	www.planetary.org /html/news/articlearchive/headlines/2001/bigasteroid.html (485 words)

	Asteroid Castalia
		Asteroid 4769 Castalia is a near-Earth crossing asteroid that was discovered by Eleanor F. Helin (Caltech) on August 9, 1989.
		This is the first detailed 3D model of a near Earth asteroid yet produced, and the most conclusive evidence to date of a "contact-binary" object in the solar system.
		This is a shaded relief map of asteroid 4769 Castalia, previously known as 1989 PB.
	www.solarviews.com /eng/castalia.htm (485 words)

	Shape of Asteroid 433 Eros
		Asteroid 433 Eros is the second largest member of the near-Earth population and also one of the most elongated.
		As vertices are perturbed on one side of the asteroid to improve the spectral fit near one rotation phase, there must be associated perturbations elsewhere to maintain principal axis rotation about the origin in a manner that does not compromise the goodness of fit at other rotation phases.
		Radar observations of asteroids 1 Ceres, 2 Pallas, and 4 Vesta.
	echo.jpl.nasa.gov /asteroids/433_Eros/eros.html (485 words)

	Earthcrosser
		The avreage size of the 1,400 known near-Earth asteroids is less than one kilometer.
		A new member of this asteroid class has now been found, and its brightness suggests that it may be the largest Earth-crossing asteroid known.
		A newly discovered rare asteroid may be the largest Earth-crosser found.
	mysite.wanadoo-members.co.uk /blobrana/news/comet.html (485 words)

	Dionysus
		It is an Apollo asteroid and its orbit overlaps the Earth's orbit.
		Asteroid 3671 Dionysus will make make a close flyby of Earth on July 6 of this year at a distance of 0.1144 AU (10.6 million miles or 17.2 million km) with a expected magnitude of 14.9.
		The Apollo-type asteroid 3671 Dionysus, an Earth-crosser in a 3.25 year orbit, is having a close approach of about 17 million km of Earth in July, when it will brighten to 15th magnitude.
	www.xs4all.nl /~carlkop/dionysus.html (485 words)

	Earth-crosser asteroid - Wikipedia, the free encyclopedia
		An Earth-crosser asteroid is a Near-Earth asteroid whose orbit crosses that of Earth.
		The yellow band marks the Earth's orbit; the red line marks the asteroid's path.
		The Earth-crosser asteroid group is a separate group from the
	en.wikipedia.org /wiki/Earth-crosser_asteroid (485 words)

Try your search on: Qwika (all wikis)

Topic: Near Earth asteroid

Ads by Google

Related Topics

In the News (Sun 29 Nov 09)