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Topic: F type asteroid

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	Asteroid - Wikipedia, the free encyclopedia
		Asteroids are commonly classified into groups based on the characteristics of their orbits and on the details of the spectrum of sunlight they reflect.
		Asteroid naming is not always a free-for-all: there are some types of asteroid for which rules have developed about the sources of names.
		Until the age of space travel, asteroids were merely pinpricks of light in even the largest telescopes and their shapes and terrain remained a mystery.
	en.wikipedia.org /wiki/Asteroid (3334 words)

	asteroid
		Most asteroids move in orbits that are somewhat more inclined and eccentric than those of the major planets (with the exception of Pluto) — the orbit of an average main-belt asteroid being inclined at about 10° to the plane of the ecliptic with an eccentricity of about 0.15.
		Low-albedo asteroids are generally found in the outer half of the asteroid belt, while higher-albedo objects tend to occupy the inner half.
		The distribution of the various classes throughout the asteroid belt is highly structured, suggesting that many asteroids formed at or near their present distances from the Sun and are representative of the composition of the solar nebula (not including hydrogen and helium) at these locations.
	www.daviddarling.info /encyclopedia/A/asteroid.html (1799 words)

	Asteroid (Site not responding. Last check: 2007-08-19)
		The asteroids are believed to be remnants of the protoplanetary disc which were not incorporated into planets during the system's formation.
		The vast majority of the asteroids are within the asteroid belt, with elliptical orbits between those of Mars and Jupiter.
		The first "nearby" photos of an asteroid were taken by the Galileo spacecraft of 951 Gaspra and 243 Ida (1991), while NEAR Shoemaker landed on 433 Eros (2001).
	www.bidprobe.com /en/wikipedia/a/as/asteroid.html (1552 words)

	Asteroid (Site not responding. Last check: 2007-08-19)
		Asteroids composed largely of ice are known as comets.
		A large group of asteroids have orbits between the orbits of Mars and Jupiter, roughly 2 to 4 AU, in a region known as the Main belt.
		Asteroids are classified into spectral types by their optical spectrum, which corresponds to the composition of the asteroid's surface material.
	www.explainthat.info /as/asteroid.html (1403 words)

	Shape of Asteroid 433 Eros (Site not responding. Last check: 2007-08-19)
		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 (5035 words)

	[No title]
		One of the primary objectives of the NEAR mission is to obtain global maps of the asteroid surface with respect to morphology, topography, mineralogy, and elemental composition.
		Asteroids can be remnants of the early solar system, when the accretion of the planets took place, or break-ups of smaller objects that once formed but were fragmented by collisions and/or impacts.
		The solar flux from 1 to 10 keV is a continuum that decreases with a power-law.
	ecf.hq.eso.org /~ralbrech/amico/intabs/bruecknerj.html (1421 words)

	asteroid
		Many asteroids are so small that their sizes cannot be measured directly; in many cases, their sizes have been estimated from their brightness and distances.
		The near-earth asteroids, which closely approach the earth, are classed as Atens (with orbits between the earth and the sun), Apollos (with orbits similar to that of the earth), and Amors (with orbits between the earth and Mars).
		The origin of asteroids is unclear; one theory claims that they were formed from material that could not condense into a single planet because of perturbation effects involving Jupiter.
	www.factmonster.com /ce6/sci/A0805110.html (969 words)

	Iowa Robotic Telescope Facilities
		Asteroids are relatively small chunks of rock orbiting the sun mostly between the orbits of Mars and Jupiter.
		For an asteroid near opposition in a prograde orbit, the observed angular motion as viewed from the Earth is the
		Calculate the expected apparent magnitude at opposition V. Compare with your measured V. Use your estimate of the asteroid type and the discussion in the introduction to estimate the albedo.
	phobos.physics.uiowa.edu /curriculum/asteroids1.html (1237 words)

	F-type asteroid - Wikipedia, the free encyclopedia
		F-type asteroids are a relatively uncommon type of carbonaceous asteroid, falling into the wider C-group.
		Generally similar to the B-type asteroids, but lacking the "water" absorption feature around 3μm indicative of hydrated minerals, and differing in the low wavelength part of the ultraviolet spectrum below 0.4μm.
		The F-type and B-type asteroids are not distinguishable with the criteria used in the SMASS classification, so in that scheme are grouped together under the B-type.
	en.wikipedia.org /wiki/F-type_asteroid (135 words)

	[No title] (Site not responding. Last check: 2007-08-19)
		Asteroid classification relies on measurements of color and albedo rather than mineralogy or elemental abundances because there are currently no methods in practice to derive the latter.
		One of the most prevalent arguments today (in regards to any asteroid meteorite link) is that the spectral properties of asteroid regoliths are altered by a process of maturation, or space weathering, such that they can be no longer recognized as meteorite parent material.
		Judging from the asteroid literature, there does not appear to be any meaningful progress toward solving the haunting problem of the S-Type/OC connection with the existing data and methods of interpretation.
	www.uark.edu /campus-resources/metsoc/robinson.htm (968 words)

	NEAR and asteroid 433 Eros
		This pair of images of the asteroid Eros was acquired by the Near Earth Asteroid Rendezvous (NEAR) spacecraft on December 23, 1998, as the spacecraft flew by the night side of the asteroid at a distance of 2300 miles (3800 kilometers) at 1:43 PM EST.
		This montage of the asteroid Eros was assembled from images acquired by the Near Earth Asteroid Rendezvous (NEAR) spacecraft on Dec. 23, as the spacecraft flew by the asteroid at a distance of 2,500 miles (4,100 kilometers) at 1:43 p.m.
		Asteroids are thought to be the building blocks of the solar system -- aggregates of rock and dust that were left over after the formation of the planets.
	www.xs4all.nl /~carlkop/eros.html (4926 words)

	A/CC Catalog: Asteroids 4000-19999
		The probe's infrared camera found that Braille has a spectrum that is unusual among asteroids, one usually associated with 4 Vesta, prompting the idea that Braille was originally part of Vesta, or that the two are remnants of a larger body.
		The asteroid had been known only as 1992 KD until a couple of days before the flyby, when it was named after Louis Braille, inventor of the raised-dot reading system for sightless people.
		The population of near-Earth asteroids in coorbital motion with the Earth.
	www.hohmanntransfer.com /cat/an3.htm (2425 words)

	New Science: NEAR Obiting Asteroid (03/03/00)
		Ever since the asteroid belt was discovered early in the 19th century, scientists have wondered if these tiny planet-like objects are the remains of a planet that never formed, or the fragments left behind by a planet that exploded.
		The asteroid belt is a broad area between the orbits of Mars and Jupiter.
		The Near Earth Asteroid Rendezvous mission is the first launch in the Discovery Program, a NASA initiative for small planetary missions, with a maximum 3-year development cycle.
	liftoff.msfc.nasa.gov /News/2000/News-Eros.asp (758 words)

	Asteroid (Site not responding. Last check: 2007-08-19)
		The term "asteroid" was coined by William Herschel because of the star-like appearance of the first few asteroids discovered (the other then-known planets all show discs, by comparison).
		Ironically, the first asteroid, 1 Ceres, was not discovered by a member of the group, but rather by accident in 1801.
		In 2003, a new class of asteroids, the Apoheles, was discovered when 2003 CP was found to have an orbit that always keeps it closer to the Sun than the Earth.
	www.yotor.com /wiki/en/as/Asteroid.htm (1993 words)

	Nat' Academies Press, Exploration of Near Earth Objects (1998)
		Both of the main-belt asteroids encountered during Galileo spacecraft flybys—(951) Gaspra and (243) Ida—are of the S class, as is the NEAR mission target (433) Eros.
		The spectral signature for water of hydration in phyllosilicates is particularly diagnostic for asteroids that have suffered aqueous alteration.
		Further information on linkages between various kinds of meteorites and their asteroidal parents may be provided by the identification and study of asteroid families, which are probably disrupted fragments of larger bodies.
	www.nap.edu /books/0309060834/html/8.html (4213 words)

	asteroid 832 Karin (Site not responding. Last check: 2007-08-19)
		It is an S-type asteroid and a member of the Koronis family in the Main Belt.
		This indicates that the parent asteroid, estimated at 23.5 to 25.5 km.
		The recent breakup of an asteroid in the main-belt region.
	www.hohmanntransfer.com /cgi-bin/get.cgi?num=832 (394 words)

	Asteroid (Site not responding. Last check: 2007-08-19)
		As of May 23, 2005, from a total of 277,090 minor planets with calculated orbits, 99,906 asteroids had been calculated well enough to be given official numbers and 12,345 of these had been officially named (598 of which have names requiring diacriticals).
		The first asteroid to be left unnamed was (3360) 1981 VA. On rare occasions, an asteroid's provisional designation may become used as a name in itself: the still unnamed (15760) 1992 QB1 gave its name to a group of asteroids which became known as cubewanos.
		In The Empire Strikes Back (1980), Han Solo escapes Empire spacecraft by hiding the Millennium Falcon on an asteroid, but is then attacked by a vast monster that lives (for some unexplained reason) within the asteroid.
	www.worldhistory.com /wiki/A/Asteroid.htm (3055 words)

	[41.17] First Asteroid Spectrometric Observations with BTA: 3045 Alois (Site not responding. Last check: 2007-08-19)
		We have firstly performed with the telescope spectrometric observations of a main belt asteroid, 3045 Alois, and are planning to use it for Centaurs and Kuiper Belt objects spectrometry.
		HD105633 (G5) [1] considered as a solar analog was also observed, and the data were used for calculation the asteroid reflectance spectra.
		From the data and taking into account the mean heliocentric distance of 3045 Alois (3.13 AU) we suppose that the asteroid having irregular spectral characteristics may be of M- or E-type and possibly hydrated.
	www.aas.org /publications/baas/v33n3/dps2001/109.htm (294 words)

	Observations of objects of type "Asteroid" (Site not responding. Last check: 2007-08-19)
		The last celestial object that I viewed in a rather short observing session was the asteroid 2 Pallas (at 118x), which will reach opposition on the September 16th.
		Pallas, the second asteroid to be discovered, was due east of a pair of field stars that formed an acute right triangle with a third field star.
		Asteroid 4 Vesta, which is about 530 kilometers in diameter and was at opposition on 10/17, is currently southeast of Saturn.
	www.lies.com /aaol/view_obs.cgi?type=at (1243 words)

	[41.21] Initial Results of the Cornell Mid-IR Asteroid Spectroscopy Survey (Site not responding. Last check: 2007-08-19)
		Silicate minerals, which form the major constituents of asteroid surfaces, exhibit important diagnostic emissivity features in the thermal infrared.
		MIDAS covers the 8-14 micron wavelength region and is conducted at Palomar Observatory using the Spectrocam-10 (SC-10) spectrograph on the 200-inch Hale telescope.
		We hope to sample the spectra of a statistically significant number of asteroids from a wide variety of the current visible to near-IR spectral classes.
	www.aas.org /publications/baas/v33n3/dps2001/455.htm (290 words)

	Bill Bottke's Asteroid Research Home Page
		I have lots of research interests, but I concentrate on trying to understand asteroids; how they formed, how they evolve (collisionally, through asteroid impacts, and dynamically, through planetary perturbations), what they are made of, and what their structure is like.
		Delay-doppler radar images from Steve Ostro (and others) at JPL show that this asteroid is nearly 3 times as long as it is wide (5.1 x 1.8 km, or 2.8 x 1.0 normalized).
		I suggest that rubble-pile asteroids, after experiencing a close approach with Earth, are frequently split into multiple fragments which can begin to orbit one another.
	www.boulder.swri.edu /~bottke (759 words)

	Asteroid (Site not responding. Last check: 2007-08-19)
		The LINEAR system alone has discovered 50,484 asteroids as of May 24, 2005 [4] (http://cfa-www.harvard.edu/iau/lists/MPDiscSites.html).
		Between all of the automated systems, 3353 near-Earth asteroids have been discovered [5] (http://cfa-www.harvard.edu/iau/lists/Unusual.html) including over 600 more than 1 km in diameter.
		On rare occasions, an asteroid's provisional designation may become used as a name in itself: the still unnamed (15760) 1992 QB1 gave its name to a group of asteroids which became known as cubewanos.
	www.freecaviar.com /search.php?title=Asteroid (3054 words)

	(22) Kalliope and Linus
		On the surface composition of the M-type asteroids
		Observations of asteroids in the 3- to 4-micron region
		UBV photometry of the M-type asteroids 16 Psyche and 22 Kalliope
	www.johnstonsarchive.net /astro/astmoons/am-00022.html (973 words)

	ADU Web Site: Chicxulub Impact Crater Provides Clues to Earth's History
		In 1980, Luis Alvarez and his geologist son, Walter, proposed that a giant asteroid or comet struck the Earth approximately 65 million years ago and caused the mass extinctions of the dinosaurs and over 70% of all life on Earth.
		Thus the clay layer itself, the scientists reasoned, must hold clues to the duration and nature of the mysterious KT extinction event, one of the most dramatic calamities to afflict Earth's biosphere since the development of complex life over a billion years ago.
		They found that the clay contained high concentrations of the element iridium, extremely rare in Earth's crustal rocks but quite abundant in certain meteorites, and proposed that this clay was the altered remains of the dust cloud blasted around the world when a 10-km-wide asteroid or comet struck the Earth.
	www.agu.org /sci_soc/sharpton.html (1323 words)

	asteroid 216 Kleopatra (Site not responding. Last check: 2007-08-19)
		216 Kleopatra is an M-type asteroid that was discovered on 10 April 1880 by Johann Palisa.
		In this, the first radar imagery ever of a Main Belt asteroid, it was found to be about 217 km.
		The Arecibo radar imagery of Kleopatra was announced on 4 May 2000 in advance of the publication of "Radar observations of asteroid 216 Kleopatra" by Steven Ostro et al.
	www.hohmanntransfer.com /cgi-bin/get.cgi?num=216 (312 words)

	asteroid
		ASTEROID WILL PASS NEAR EARTH, BUT SAFELY (United Press International)
		Asteroids speed towards Earth but none is expected to hit directly.
		Thank heavens, this asteroid won't collide with Earth (The Record (Bergen County, NJ))
	www.infoplease.com /ce6/sci/A0805110.html (1057 words)

	The Absolutely Weird Bookshelf, Ace Science Fiction Specials (Site not responding. Last check: 2007-08-19)
		Compton, D.G. The Silent Multitudes Ace, 1966 (78385) 1st printing, near F. Future city is threatened by alien spores in an apocalyptic, Kafka-esque allegorical tale.
		Davidson, Avram The Phoenix and the Mirror Ace, 1969 1st printing, very slight wear, near F. Eklund, Gordon The Eclipse of Dawn Ace, 1971 1st printing, slight wear, near F. Election in a cruddy, broken down US (in 1988!!).
		Shaw, Bob The Palace of Eternity Ace,1969 1st printing, near F. Aliens are pushing back the Earthers, and a Poet's Planet becomes the stage.
	www.strangewords.com /weirdbooks/weirdbooksace.html (825 words)

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