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Topic: HED meteorite

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	Are Hermes and 1988 XB Parent Bodies of HED Meteorites?
		Meteorites are not collected in situ, but come to Earth over complex, million year paths that make identification of their individual parent bodies difficult.
		We are undertaking a statistical comparison of the times of fall of meteorites and the times of closest approach of NEA orbits with Earth.
		HED meteorites fall at ~ three times their annual rates when the Earth is near the orbits of these three NEAs.
	www.princeton.edu /~willman/LPSCXXVI1995.html (991 words)

	Meteoroids and Meteorites
		Pallasites are stony iron meteorites composed of olivine enclosed in metal.
		Meteorites are bits of rock that are captured by a planet's gravity and pulled to the surface.
		This meteorite is assumed to be a sample of the crust of the asteroid Vesta, which is only the third solar system object beyond Earth where scientists have a laboratory sample (the other extraterrestrial samples are from Mars and the Moon).
	www.solarviews.com /eng/meteor.htm (1526 words)

	Bereba Eucrite
		The members of the HED group represent more evolved achondrites that have experienced extensive igneous processing similar to the magmatic rocks found here on Earth.
		Ongoing research has confirmed this match for the howardites and diogenites, and today it is widely accepted that Vesta is indeed the common parent body for the achondrites of the HED group.
		Some of these "children of Vesta" subsequently entered a near-Earth orbit, and they are thought to be the actual sources of the howardites, eucrites, and diogenites that have made their passage to Earth in the form of meteorites.
	www.meteorite.fr /en/forsale/bereba.htm (445 words)

	diogenite
		This is especially true for the Tatahouine meteorite, a unique diogenite that fell in Tunisia in 1931 and is renowned for its green, centimeter-sized pyroxene crystals.
		Diogenites belong to the HED group, the same family of meteorites as howardites and eucrites.
		B.C. who was the first to suggest that meteorites come from space (a realization that was subsequently forgotten for the next 2,000 years).
	daviddarling.info /encyclopedia/D/diogenite.html (214 words)

	meteorite central > meteorite mailing list - best of (Site not responding. Last check: 2007-10-28)
		This was her very first meteorite find and weighing in at 126.5 grams, it is a nice one.
		Meteorites with provisional NWA numbers are eligible for receipt of a non-NWA name.
		There was strong support in most parts of the meteorite community AND on the NomCom for changing these rules in some way that would allow the Committee to recognize pairings, which in turn would reduce the type-specimen requirements for certain paired meteorites.
	www.meteoritecentral.com /mailing_list_best.shtml (2056 words)

	Clark R. Chapman's Publications (Site not responding. Last check: 2007-10-28)
		Meteorites from the asteroid belt: The stony-iron connection (extended abstract).
		Constraints on the derivation of all meteorite classes from the asteroid belt (extended abstract).
		From asteroids to meteorites: the role of asteroid collisions (abstract).
	www.boulder.swri.edu /clark/pub.html (9684 words)

	[No title]
		A small grain mount and bulk sample of this meteorite were examined as part of my study of diogenite meteorites, but it was only recently after I studied a thin section of ALH 84001 that the petrography of the sample revealed its true nature.
		Maskelynite is rare in HED meteorites, although much of the plagioclase in the eucrites ALHA 81313 and Padvarninkai is maskelynite.
		Moreover, as these meteorites are widely believed to come from Mars, an undoubtedly petrologically diverse planet, we can expect (hope) that very different rock types from the SNC parent body might find their way into our meteorite collections.
	www.lpi.usra.edu /lpi/meteorites/mitm96.html (4180 words)

	A/CC Scientific References (Site not responding. Last check: 2007-10-28)
		A new type of carbonaceous chondrite, the Tagish Lake meteorite, exhibits a reflectance spectrum similar to spectra observed of D-type asteroids, which are relatively abundant in the outer Solar System beyond the main asteroid belt, but until now there had been no analog for them in meteorite collections.
		The Tagish Lake meteorite is a carbon rich, aqueously altered carbonaceous chondrite, and contains high concentrations of presolar grains and carbonate minerals, consistent with expectation that D-type asteroids were originally made of primitive materials and did not experience any extensive heating.
		Orbital calculations for 17 very bright bolides, including four associated with meteorite finds, suggest that the sources for kilometer-size near-Earth asteroids and meter-size meteoroids are probably the same, and that these two types of bodies just sample different parts of the size distribution of a population of interplanetary objects with common dynamical features.
	www.hohmanntransfer.com /papers.htm (4205 words)

	Meteorite Achondrite
		Chunks chipped off by such impacts may have been thrown onto new orbits, which cross the earth's orbits, and indeed in three such "earth crossers", 1983 RD, 1980 PA and 1985 DO2, excellent spectral correspondences with the lab spectra of eucrites and a high similarity to the reflection behaviour of Vesta was found.
		Due to their equal isotope proportions, howardites (these are breccias of diogenites and eucrites), eucrites and diogenites are usually subsumed into the so-called HED group.
		During the fall, the meteorite burst into thousands of tiny little stones, which rained down onto an area of some 500m across.
	www.meteorite-martin.de /english/achondrite_en.html (449 words)

	Info and facts on '4 Vesta' (Site not responding. Last check: 2007-10-28)
		Some family members, such as 9969 Braille (additional info and facts about 9969 Braille), have become Near-Earth asteroid (additional info and facts about Near-Earth asteroid) s.
		Smaller fragments have even rained down as meteorites (Stony or metallic object that is the remains of a meteoroid that has reached the earth's surface) ; Vesta is thought to be the source of the HED meteorites.
		Our knowledge about Vesta is expected to increase tremendously when the Dawn (The first light of day) probe (An investigation conducted using a probe instrument) enters orbit (The (usually elliptical) path described by one celestial body in its revolution about another) around the asteroid for nine months in 2010-2011.
	www.absoluteastronomy.com /encyclopedia/4/4/4_vesta.htm (475 words)

	howardite concept from the Meteorites knowledge base (Site not responding. Last check: 2007-10-28)
		rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > HED meteorite > howardite
		Next HED meteorite: diogenite Up: HED meteorite Previous HED meteorite: eucrite
		has ablative mass loss high because it is more friable than iron meteorite
	www.site.uottawa.ca:4321 /meteorites/howardite.html (336 words)

	Publikationen 1999
		Goodrich, C.A., and A.M. Fioretti: The parent magmas of ureilites FRO 90054 and Hughes 009: Inferences from melt inclusions in FRO 90054.
		Jagoutz, E. and A. Kubny: Vibrational spectroscopic study of feldspathic glasses in SNC meteorites.
		Scherer, P., M. Pätsch and L. Schultz: Noble gases in 15 meteorites from the Sahara: Eucrites, ureilites, and ordinary chondrites.
	www.mpch-mainz.mpg.de /mpg/deutsch/00.html (6189 words)

	Meteorite.fr - For Sale - Primitive Achondrites (Site not responding. Last check: 2007-10-28)
		Have a look at some of the meteorites we are offering for sale.
		By clicking on the names of each meteorite class in the navigation box on the right you will be taken to a selection of meteorite specimens pertaining to each class.
		We couldn't find the time to include specimen weights, sizes, and prices so far, but we are planning to have a major update in December 2003.
	www.meteorite.fr /en/forsale (187 words)

	Ingrid's Rockin' Dictionary
		An iron meteorite made almost entirely of taenite; the name means "without structure" and refers to the lack of a visible
		A type of achondrite meteorite made primarily from basaltic plagioclase and (Ca-)pyroxene; three types: noncumulate, cumulate, and polymict; grouped with howardites and diogenites in HED meteorite classification; [see Meteorites f for HEDs]
		Depressions resembling (and called) thumbprints that are produced on the surface of some meteorites during atmospheric Itransit by material ablating (melting) off the surface.
	www.lpl.arizona.edu /~ingrid/dictionary.html (6780 words)

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