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Topic: 4 Vesta

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	4 Vesta - Wikipedia, the free encyclopedia
		4 Vesta (ves'-ta) is the second most massive asteroid in the asteroid belt, with a mean diameter of about 530 km and an estimated mass 12% the mass of the entire asteroid belt.
		Vesta is the second-largest asteroid, and the largest in the Inner Main Belt, which lies interior to the Kirkwood gap at 2.50 AU.
		Vesta is thought to consist of a metallic iron-nickel core, an overlying rocky olivine mantle, with a surface crust.
	en.wikipedia.org /wiki/4_Vesta (1503 words)

	Asteroid Vesta
		Vesta has a diameter of 525 kilometers (326 miles) and is smaller than the state of Arizona.
		Vesta is the most geologically diverse of the large asteroids and the only known one with distinctive light and dark areas -- much like the face of our Moon.
		Vesta's surface shows a geology similar to that of terrestrial worlds such as Earth and Mars.
	www.solarviews.com /eng/vesta.htm (1447 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		Asteroids spectroscopically associated with Vesta that possess this feature are dynamically distinct and could have arisen from a different collisional event on Vesta or originated from a body geochemically similar to Vesta that was disrupted early in the history of the solar system.
		The mystery of how putative pieces of Vesta were transported to the Earth remained unexplained until Binzel and Xu (1993) identified 20 asteroids near Vesta that showed the deep mafic silicate absorption feature near 1 micron (suggesting a spectrally-dominant pyroxene composition with ferrous iron) characteristic of Vesta's spectrum.
		Vesta is also known to have a dynamical family of asteroids associated with it (Zappala et al.
	dorothy.as.arizona.edu /sykes/VESTA/paper3.txt (2532 words)

	Learn more about 4 Vesta in the online encyclopedia. (Site not responding. Last check: 2007-11-05)
		Vesta is the third-largest known asteroid, 525 kilometers in diameter, discovered in 1807.
		This indicates that in the distant past Vesta likely differentiated into layers and underwent many of the same geological processes that the early Earth and Mars underwent.
		Dozens of Vesta-like asteroids are presumed to have existed at one time, but since then have been broken apart into families of smaller asteroids; nickel-iron asteroids are thought to come from the cores of such bodies, with stony ones coming from their crusts and mantles.
	www.onlineencyclopedia.org /4/4_/4_vesta.html (275 words)

	Vesta - Wikipedia, the free encyclopedia
		The goddess Vesta in Roman mythology equivalent to Greek Hestia
		The asteroid 4 Vesta, named for the Roman deity.
		Vesta Rowing Club who row from their boathouse in Putney, London on the River Thames.
	en.wikipedia.org /wiki/Vesta (110 words)

	Asteroid (4) Vesta
		Vesta was in conjuction with the Sun on May 11.
		Vesta is the brightest of the asteroids, at the best oppositions it does become a faint naked eye object.
		Vesta was the fourth Minor Planet or Asteroid to be discovered, being first observed as a minor planet in 1807 by H W Olbers at Bremen.
	www.rasnz.org.nz /MinorP/Vesta.htm (525 words)

	[34.13] Mineralogical Analysis of Basaltic Asteroids in the Neighbourhood of (4) Vesta (Site not responding. Last check: 2007-11-05)
		(4) Vesta is the unique large asteroid with a basaltic surface present in the Asteroid Belt.
		Among the observed asteroids 12 are members of the Vesta's dynamical family while the remaining are V-type asteroids in the neighbourhood, but not members of the family.
		The precise mineralogical composition of the observed asteroids was determined using the technique described in Gaffey et al.[Icarus 196, 573, 1993].
	www.aas.org /publications/baas/v35n4/dps2003/276.htm (390 words)

	Astron. Astrophys. 320, 652-658 (1997) (Site not responding. Last check: 2007-11-05)
		This shows that Vesta very strongly perturbs the orbit of Thetis and is responsible for the systematic effect in the residuals shown in Fig.
		This implies that the resulting perturbation of Vesta on the orbit of Thetis is important (the deviation of the orbit of Thetis in right ascension reaches between 0.5 and 1" per year after the encounter, i.e.
		Apart from Vesta's approach, the most significant close approach for 1990-2001 concerning Thetis is certainly the one with the asteroid (11) Parthenope, in January 1997, for which the minimum distance will be 0.00536 AU, i.e.
	aa.springer.de /papers/7320002/2300652/sc3.htm (1132 words)

	Institute of Space and Astronautical Science \| JAXA
		Asteroid 4 Vesta located between Mars and Jupiter is thought to include low concentrations of volatile materials due to being experienced high temperature enough to melt the rocks (See Figure 3), and too low gravity to hold the atmosphere (See Figure 4).
		4 Vesta is unlike the 25143 Itokawa, which will be explored by HAYABUSA (MUSES-C) spacecraft (See Figure 5), the "smallest" terrestrial planet with core, mantle and crust.
		According to analysis of HED meteorites and simulation of impact, source of hydrated and/or hydroxylated minerals is not Vesta inherent origin but fragments of impactors of carbonaceous chondrites containing material associated with life such as hydrated mineral, hydrocarbons, amino acids.
	www.isas.ac.jp /e/snews/2003/1029.shtml (190 words)

	asteroid 4 Vesta (Site not responding. Last check: 2007-11-05)
		Vesta was named by Olbers, at the suggestion of Carl Friedrich Gauss, for the Roman goddess of virtue.
		As you will read at the following links, telescope images show that the asteroid Vesta has suffered one or more catastrophic impacts, and it is thought that an exclusive family/class of asteroids and meteorites are a result of, or come from the breakup of, a larger object from which they all originated.
		To help test the new Keck II adaptive optics telescope in Hawaii, Vesta was viewed in February and April 1999, and the resulting images were compiled into animations in true color and in spectrums relating to topography, mineralogy, and other surface details: page 1, page 2.
	www.hohmanntransfer.com /cgi-bin/get.cgi?num=4 (1129 words)

	Chiu: Aufer, Vesta, Diem! Inventing the Augustan Goddess in Ovid's Fasti
		Ovid, by inventing myth for Vesta, invents a place for her in which she emerges as the main goddess of Augustus's new Roman identity.
		In Fasti 4 and 5, the sensuous goddess Flora becomes a proxy for Venus, and she too is displaced by Vesta.
		The final test case for the ascendancy of Vesta and her prerogatives over Venus's in the Fasti is the pair of Priapus's rape attempts: on the nymph Lotis in 1.391-440 and on Vesta herself in 6.319-348.
	www.camws.org /meeting/2005/abstracts2005/chiu.html (591 words)

	HubbleSite - Hubble Reveals Huge Crater on the Surface of the Asteroid Vesta - 9/4/1997
		The crater is a link in a chain of events thought responsible for forming a distinctive class of tiny asteroids as well as some meteorites that have reached the Earth.
		Astronomers had predicted the existence of one or more large craters, reasoning that if Vesta is the true "parent body" of some smaller asteroids then it should have the wound of a major impact that was catastrophic enough to knock off big chunks.
		In this Hubble picture of Vesta, a "nub" at the bottom of the asteroid is suggestive of a catastrophic impact.
	hubblesite.org /newscenter/newsdesk/archive/releases/1997/27 (199 words)

	Amazon.com: Vesta 4 U: Music (Site not responding. Last check: 2007-11-05)
		Vesta, like Lisa Fischer (whom was compared to Mariah Carey and Whitney Houston in her time), was compared to the legendary graveled voice diva Chaka Khan.
		And Vesta's vocals are not to be dissed.
		Vesta Williams returned in 1988 with the smash hit cd 4U that won the ears of many radio stations with the lovely ballad Congratulations that was a top ten hit on the 80's charts and quickly became Vesta's {as she was better known as} trademark hit and becoming an instant classic.
	www.amazon.com /exec/obidos/tg/detail/-/B000002GI9?v=glance (1529 words)

	Ephemerides of the Largest Asteroids (Site not responding. Last check: 2007-11-05)
		Ceres, Pallas, and Vesta deserve such attention because they are the three most massive asteroids, the source of significant perturbations of the planets, and are among the brightest main belt asteroids making them prime targets for photometric and spectroscopic studies aimed at understanding the composition of the asteroids.
		The masses of Ceres, Pallas, and Vesta the masses were determined from mutual perturbations between the three large asteroids.
		Preliminary masses for Ceres using Pallas, Juno, and Vesta as the perturbed asteroid and using the preliminary estimate for the mass of Pallas made while generating the ephemerides are in green, and the final mass for the mass of Ceres is in red.
	aa.usno.navy.mil /hilton/ephemerides/asteroid_ephemerides.html (9264 words)

	Cornell Science News: Vesta Crater
		News of the dent's discovery is published in an article, "Impact Excavation On Asteroid 4 Vesta: Hubble Space Telescope Results," in today's issue of Science, (Sept. 5).
		Tailing Vesta through space is a family of smaller asteroids with similar geochemical make-up which had previously puzzled astronomers.
		Obtaining approximate dimensions of Vesta and the crater from images is calculated by knowing the distance from the Earth to Vesta, and factoring in the camera's characteristics, such as focal length.
	www.news.cornell.edu /releases/Sept97/Vesta.bpf.html (797 words)

	THE FIRST CONFIRMATION OF A COMMON ORIGIN FOR A SMALL V-CLASS ASTEROID WITH 4 VESTA AND THE HED METEORITES (Site not responding. Last check: 2007-11-05)
		Analysis of a new, near-infrared spectrum for 1929 Kollaa allows us to determine not only that this mainbelt asteroid is a daughter of 4 Vesta, but also to constrain the location of its formation within Vesta and its connection to a group of meteorites.
		Dynamical studies previously revealed that a family of mainbelt asteroids is associated with 4 Vesta.
		Furthermore, it establishes the first mineralogical (genetic) connection between a Vesta-region asteroid with both 4 Vesta and a subset of the HED meteorites.
	gsa.confex.com /gsa/2001AM/finalprogram/abstract_20247.htm (447 words)

	PSRD: Meteorite QUE 93148: Asteroid Mantle Material?
		Tom McCord and colleagues first showed in 1970 that the reflectance spectrum of asteroid 4 Vesta matched the spectrum of a basaltic eucrite.
		Since that time, there have been countless debates over whether or not 4 Vesta is indeed the HED parent body, but the issue remains unresolved.
		If the main group pallasites and the HED meteorites are indeed from the same parent body and if this parent body is in fact the asteroid 4 Vesta (two big unresolved 'ifs') then QUE 93148 might be our first sample from the mantle of this asteroid.
	www.psrd.hawaii.edu /Jan03/QUE93148.html (2494 words)

	Science News: Asteroids and meteorites: a new link. (4 Vesta ... @ HighBeam Research (Site not responding. Last check: 2007-11-05)
		Thus, 4 Vesta seems likely to be the parent of this group of meteorites.
		But that poses a problem, because 4 Vesta resides in a region of the asteroid belt from which material can't easily reach the inner solar system and Earth.
		Binzel and Xu conclude that 4 Vesta is indeed the parent body of most basaltic achondrites.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:12715236&refid=holomed_1 (423 words)

	New Masses and Densities for 1 Ceres, 2 Pallas, and 4 Vesta (Site not responding. Last check: 2007-11-05)
		This smaller mass is a direct consequence of the fact that the mass determined for Pallas is at the upper one sigma bound of previous determinations for its mass.
		The mass for Vesta is in good agreement with previous determinations of its mass.
		The uncertainty in the mass of Pallas is 1/5 that of the most recent determination of its mass and the uncertainty in the mass of Vesta is 1/3 that of the most recent determination of its mass.
	www.aas.org /publications/baas/v29n5/aas191/abs/S071006.html (347 words)

	When Did the asteroids Become Minor Planets? (Site not responding. Last check: 2007-11-05)
		The discoveries of Juno in 1804 and Vesta in 1807 raised concern in astronomers of the day that the asteroids were fragments of a planet that had somehow disintegrated.
		The first new asteroid for which the new symbol convention was used was 16 Psyche by Ferguson (1852) in the publication of a series of observations at the U.S. Naval Observatory.
		The diameters of the first three asteroids were derived from direct estimates of the sizes of their disks by Schroter(1811) and are directly comparable to the 2390 km of Pluto.
	aa.usno.navy.mil /hilton/AsteroidHistory/minorplanets.html (3812 words)

	NON-CUMULATE VS. CUMULATE EUCRITES: HETEROGENEITY OF 4 VESTA (Site not responding. Last check: 2007-11-05)
		Although the parent body of these meteorites has not been identified, a strong argument was made in favor of the asteroid 4 Vesta [1,2,3].
		Despite the debate of whether eucrites are the products of either fractional crystallization of more magnesian liquids [4] or low pressure partial melting of an olivine+pyroxene+plagioclase assemblage [5], most investigators believe that non-cumulate and cumulate eucrites are closely related.
		This concept was first challenged by the Schmitt group who argued that the magmas with which cumulate eucrites may have equilibrated were LREE-rich and that such melts could not be related to non-cumulate eucrites by fractional crystallization [6,7].
	www.gps.caltech.edu /users/whsu/pub/wksp96.html (897 words)

	Science News: Big asteroid has big dent. (4 Vesta has crater)... @ HighBeam Research (Site not responding. Last check: 2007-11-05)
		The asteroid called 4 Vesta has long had a special place in the hearts of planetary scientists.
		Scientists had assumed that these bodies represent pieces of Vesta knocked off during some past collision, but it remained unclear whether the large asteroid had, in fact, ever suffered a mammoth impact.
		An analysis of Hubble Space Telescope images of Vesta taken last year, when the rocky body was the closest it had been to Earth in a decade, now reveals a crater 460 kilometers wide and 13 km deep near the asteroid's south pole.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:19851997&refid=holomed_1 (275 words)

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