Comet Swift-Tuttle

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Topic: Comet Swift-Tuttle

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	109P/Swift-Tuttle - Wikipedia, the free encyclopedia
		Comet Swift-Tuttle (formally designated as 109P/Swift-Tuttle) was independently discovered by Lewis Swift on July 16, 1862 and by Horace Parnell Tuttle on July 19, 1862.
		The comet made a return appearance in 1992, when it was rediscovered by Japanese astronomer Tsuruhiko Kiuchi.
		According to a New Scientist article, the comet is on an orbit which will almost certainly eventually hit either the Earth or the Moon, though not within this millennium.
	en.wikipedia.org /wiki/Comet_Swift-Tuttle (107 words)

	வால்வெள்ளி - தமிழ் விக்கிபீடியா (Tamil Wikipedia)
		Comets are now designated by the year of their discovery followed by a letter indicating the half-month of the discovery and a number indicating the order of discovery, so that the fourth comet discovered in the second half of February 2006 would be designated 2006 D4.
		He rejected the ideas of several earlier philosophers that comets were planets, or at least a phenomenon related to the planets, on the grounds that while the planets confined their motion to the circle of the Zodiac, comets could appear in any part of the sky.
		Until 1994, comets were first given a provisional designation consisting of the year of their discovery followed by a lowercase letter indicating its order of discovery in that year (for example, Comet Bennett 1969i was the 9th comet discovery in 1969).
	ta.wikipedia.org /wiki/%E0%AE%B5%E0%AE%BE%E0%AE%B2%E0%AF%8D%E0%AE%B5%E0%AF%86%E0%AE%B3%E0%AF%8D%E0%AE%B3%E0%AE%BF (3559 words)

	Perseids - Wikipedia, the free encyclopedia
		The Perseids are a prolific meteor shower associated with the comet Swift-Tuttle.
		The cloud is comprised of particles ejected by the comet as it passed by the Sun.
		However, there is also a relatively young filament of dust in the stream that boiled off the comet in 1862.
	en.wikipedia.org /wiki/Perseids (373 words)

	C&MS: 109P/Swift-Tuttle
		The 1750 comet appeared at just about the right time expected for Swift-Tuttle if that comet's motion was integrated back from 1862.
		Schjellerup remarked, "The comet is rather bright, the nucleus equalled a star of 7th magnitude." He added that at a magnification of 226x they saw a distinct extension in the direction of the sun, while the surrounding nebulosity was 3 arc minutes across.
		The comet was described as stellar with a magnitude of 17.5.
	cometography.com /pcomets/109p.html (1269 words)

	ASP: Cosmic Collisions
		Comet Swift-Tuttle was first seen in July 1862 (when Abraham Lincoln was President) by two American astronomers (Lewis Swift and Horace Tuttle, hence the name Comet Swift-Tuttle).
		Since Comet Swift-Tuttle is thought to be about six-miles across, about the same size of the asteroid that killed the dinosaurs, a possible collision looked ominous.
		His new calculations show Comet Swift-Tuttle will pass a comfortable 15 million miles from Earth on its next trip to the inner solar system.
	www.astrosociety.org /education/publications/tnl/23/23.html (2612 words)

	The Rotation Period of Comet P/Swift-Tuttle
		Unfiltered CCD images of comet P/Swift-Tuttle were acquired on six consecutive nights from 25 November through 30 November 1992 with the 0.4m telescope at Limber Observatory.
		These observations will be interpreted within the context of a model of the dusty environment surrounding comet P/Swift-Tuttle.
		With an image scale of 0.804 arcsec/pixel, corresponding to about 775 km/pixel at the comet, details can be seen from dust ``jets'' in the coma to fine structure in the tail.
	www.aas.org /publications/baas/v27n4/aas187/S042009.html (145 words)

	sgen172.txt
		Comet Swift Tuttle has not yet been located If it is not going to appear until say December, it will not be in place to give us a good shower in August because its track will be quite some way from the Earth - making it a poor visual and a poor meteor track target.
		Checks with old comet records suggest that Swift Tuttle which has only been seen once, may well be Comet Kegler last seen in 1737.
		So it is reasonable to ask "When is Comet Swift Tuttle expected back, and will it like Halley and several other comets produce big meteor shower events when the comet is nearest to the Earth" ?
	www.amsat.org /amsat/ftp/articles/satgen/sgen172.txt (553 words)

	comets.txt
		Some have speculated that Halley's Comet was the Star of Bethlehem, as recorded artistically in 1304 AD by Giotto di Bondone in his Adoration of the Magi.
		There is a chance, albeit rare, that a comet could also arrive at the point of intersection at the same time as a planet.
		Another comet, named Shoemaker-Levy after the discoverers, has had a most unusual past, and is scheduled for a most unusual future.
	astro4.ast.vill.edu /labs/comets.txt (1000 words)

	PSIgate - Hot Topics - Comet Swift-Tuttle and the Perseid meteor shower
		The Perseids are debris from comet Swift-Tuttle and are visible in July and August.
		A link is provided to a high-accuracy ephemeris generator for the comet.
		Part of Gary W Kronk's Comets and Meteor Showers site, this section covers the Perseid meteor shower.
	www.psigate.ac.uk /newsite/featured_30.html (264 words)

	SPACE.com -- Science and History of the Perseid Meteor Shower
		Among the interesting points raised by Swift-Tuttle's mid-19th century appearance was the announcement in 1867 by the Italian astronomer Giovanni Schiaparelli that the orbit of the comet appeared to be nearly coincident with the orbit of the Perseid meteors.
		The most likely reason was that the Perseids parent comet was itself passing through the inner solar system and that the streams of Perseid meteoroids in the comets vicinity were larger and more thickly clumped together.
		The comet became favorably positioned high in the northern sky through the remainder of the summer.
	www.space.com /scienceastronomy/perseid_history_020806.html (1364 words)

	New Scientist Breaking News - Comet put on list of potential Earth impactors
		But comets are larger and faster-moving, on average, so their impacts could be a significant part of the overall risk to human life.
		Comet Catalina was found by the Catalina Sky Survey, one of the six current, large-scale and automated search programmes for near-Earth asteroids.
		Comet Catalina 2005 JQ5 is the largest - and therefore most potentially devastating - of the 70 objects now being tracked.
	www.newscientist.com /article.ns?id=dn7449 (744 words)

	NASA - The 2004 Perseid Meteor Shower
		Comet Swift-Tuttle is big, about the same size as the asteroid that wiped out dinosaurs 65 million years ago, and as recently as 1992 it seemed that Swift-Tuttle might strike Earth in the year 2126.
		Periodic Comet Swift-Tuttle -- (APOD) Comet Swift-Tuttle is the largest object known to make repeated passes near the Earth.
		The idea that comets and asteroids might threaten our planet was not widely accepted until the 1980s.
	www.nasa.gov /vision/universe/watchtheskies/25jun_perseids2004.html (747 words)

	Here come the Perseid meteors
		As comets enter the inner solar system, they are warmed by the sun and peppered by the solar wind, which produces the familar tails that stretch across the night sky when a bright comet is close to Earth.
		Comet tails are made of tiny pieces of ice, dust, and rock which are spewed into interplanetary space as they bubble off the comet's nucleus.
		The proximity of the comet once again caused an increase in Perseid activity and, in August 1993, observers in Central Europe were treated to 200 to 500 meteors per hour.
	science.nasa.gov /newhome/headlines/ast09aug99_1.htm (1711 words)

	Comets
		By far the most famous comet is Comet Halley but SL 9 was a "big hit" for a week in the summer of 1994.
		Was it a comet or an asteroid that caused the Chicxulub crater in the Yucatan (and probably caused the extinction of the dinosaurs)?
		Of these 184 are periodic comets (orbital periods less than 200 years); some of the remainder are no doubt periodic as well, but their orbits have not been determined with sufficient accuracy to tell for sure.
	www.seds.org /nineplanets/nineplanets/comets.html (673 words)

	The Comet Swift-Tuttle
		Periodic comet Swift-Tuttle was last seen in 1862.
		Although we are confident that the comet will pass by the Earth, it will still be prudent to attempt to follow Swift-Tuttle for as long as possible after the present perihelion passage, so that an accurate orbit determination, uncontaminated by non-gravitational effects, can be made.
		Comet Swift-Tuttle was rediscovered in September 1992, almost 10 years away from its expected position.
	www.oarval.org /section3_16.htm (806 words)

	Armagh Observatory
		Comet Swift-Tuttle's revolution period around the Sun is about 130 years.
		The Perseid meteors, or shooting stars, are small fragments of the periodic comet Swift-Tuttle, which enter the Earth's atmosphere at very high speeds - over 200,000 kilometres per hour - vaporising in the upper atmosphere at altitudes of about 100 km.
		The earliest sighting of the comet is believed to have been in 69 BC, and it was last near the vicinity of the Sun in 1992.
	www.arm.ac.uk /press/Perseids04_pr.html (427 words)

	Perseid Meteor Shower
		Comet Swift-Tuttle, the supposed parent of the Perseids, orbits the Sun in roughly 130 years.
		According to Bob Berman of Astronomy magazine, comet dust of meteor showers is much too flimsy to survive a fiery plunge into the Earth's atmosphere, and no known meteorite has come by way of a meteor shower.
		With some synergy, comet rubble (meteroids) may spawn - like fish - at just the right time and place in its orbital stream, assuring us of a spectacular meteor shower, if not a storm.
	www.idialstars.com /perseid.htm (544 words)

	Črni Vrh Observatory
		False-color image of comet 109P/Swift-Tuttle, obtained in the light of singly-ionized water ions on 1992 Nov. 19; 17.39-17.40UT, with 3.5/250mm lens, CCD and V filter.
		False-color image of comet 109P/Swift-Tuttle dust tail, obtained on 1992 Dec. 15; 17.14-17.24UT, with 3.5/250mm lens, CCD and red continuum filter, centered at 647nm (FWHM=10nm).
		False-color image of comet 109P/Swift-Tuttle, obtained in the light of singly-ionized water ions on 1992 Nov. 19; 18.27-18.37UT, with 3.5/250mm lens, CCD and narrow-band H
	www.fiz.uni-lj.si /astro/comets/images/109p.html (360 words)

	Comet Nostalgia
		Comet Swift-Tuttle is one of the biggest known periodic comets and achieved much notoriety when the popular press realised that it could collide with Earth.
		It was one of those comets that starts in the west as an evening object and works it way around the northern sky to become a morning object in the west.
		Comet Lee was discovered by Steve Lee in April 1999 at a star party near Mudgee, Australia.
	www.deep-sky.co.uk /comet.htm (2080 words)

	The Perseid meteor shower peaks on August 12, 2000
		The comet is now beyond the orbit of Saturn and is not expected to return for another 128 years.
		As it passed by the Sun in Dec. 1992, solar heating vaporized part of the comet's icy core and created a fresh cloud of dusty debris that triggered unusually intense meteor showers for two years.
		The comet's elliptical path around the Sun is almost uniformly filled with dusty debris.
	spacescience.com /headlines/y2000/ast08aug_1.htm?list (1065 words)

	Coming Perseid Meteor Storm
		In 2004, August 11 at about 21h UT, the one revolution dust trail of the Perseids parent comet Swift-Tuttle is calculated to pass within 0.0013 AU from the Earth's orbit and we expect this to cause a moderately strong, short outburst of mainly visually dim meteors.
		The ecliptic crossing of 1-to-4-revolution meteor trails left by comet Swift-Tuttle.
		But since the Perseid parent comet is a lot bigger than the Leonid comet, there may be a chance of storm level activity.
	www.metaresearch.org /solar%20system/perseid/perseids.asp (1055 words)

	THE PERSEID METEOR SHOWER
		The meteoroids, which are small fragments of the periodic comet Swift-Tuttle, travel through the Earth's atmosphere extremely quickly with almost half of them leaving persistent trains.
		Comet Swift-Tuttle takes approximately 130 years to make one circuit around the Sun, and sheds particles when closest to the Sun in its orbit.
		As a result of numerous passages past the Sun, the dust trails produced by the comet during each swing around the Sun have now been spread out almost uniformly around the orbit, resulting is a very predictable annual shower.
	star.arm.ac.uk /press/Perseids03.html (416 words)

	USATODAY.com - Perseids ready for their close-up
		The Perseids are dust from the 130-year orbit of the comet Swift-Tuttle.
		Because of the tilt of the comet's orbit, the Perseids fall exclusively on the Northern Hemisphere.
		Dust grains from the comet hit the Earth's upper atmosphere at roughly 134,000 miles an hour.
	www.usatoday.com /tech/news/2004-08-10-meteor-tips_x.htm (427 words)

	Comet 109P/Swift-Tuttle
		109P/Swift-Tuttle appears as an elongated streak in the center of this image obtained on the 3.9-m Anglo-Australian Telescope when the comet was at a distance of 5.3 AU from the sun.
	star.pst.qub.ac.uk /~af/swift.html (44 words)

	Swift-Tuttle Comet
		Response #: 1 of 1 Author: John Hawley Text: Swift-Tuttle is a periodic comet that MAY pass close to the earth on its next sojourn into the inner solar system.
		Comet orbits are impossible to predict accurately until they are detected approaching the inner solar system, because their orbits are strongly influenced by the gas giant planets, especially Jupiter.
		However, the probability of a comet actually striking the earth is extremely small (no comet has struck the earth fo at least 65 million years!)
	www.newton.dep.anl.gov /newton/askasci/1993/astron/AST057.HTM (140 words)

	SPACE.com -- Perseid Meteor Shower Peaks This Weekend
		Comet Swift-Tuttle, pictured here in false color, is the largest object known to make repeated passes near Earth.
		Over the next few days Earth will sweep through the debris trail of an ancient comet named Swift-Tuttle.
		These meteors are actually small pieces of rock that have broken off Comet Swift-Tuttle and continue to orbit the sun.
	www.space.com /scienceastronomy/solarsystem/perseids_shower_000809.html (851 words)

	The top 10 facts about the meteor show - Space.com - MSNBC.com
		Comet Swift-Tuttle was last seen in 1992, an unspectacular pass through the inner solar system that required binoculars to enjoy.
		Comet Swift-Tuttle, whose debris creates the Perseids, is the largest object known to make repeated passes near Earth.
		Comet Swift-Tuttle, the object behind the Perseid meteors, is shown here in false color, based on observations made in 1992.
	www.msnbc.msn.com /id/5663831 (971 words)

	Time: Heads up. (Comet Swift-Tuttle might impact Earth in 2126) (Brief Article)@ HighBeam Research
		(Comet Swift-Tuttle might impact Earth in 2126) (Brief Article)
		EVERY AUGUST THE EARTH PASSES THROUGH THE orbital path of Comet Swift-Tuttle.
		If the comet ever happened to be there, the 10-km-wide (6-mile) chunk of ice and rock could slam into the planet, carving an enormous crater, generating tidal waves and throwing up a worldwide pall of dust that could block sunlight for months.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:12823675&refid=holomed_1 (217 words)

	Encyclopedia of Astronomy and Astrophysics » Comet Swift–Tuttle (109P/Swift–Tuttle)
		A short-period comet discovered in 1862 independently by several observers, the first of which were Lewis Swift and Horace Tuttle.
		The comet was not recovered until September 1992, as a `new' comet repor...
		Subsequent calculations indicated that the period was around 120 years, but searches in the early 1980s failed to find it.
	dx.doi.org /10.1888/0333750888/5241 (92 words)

	Astrophotography
		Having read about Comet Swift-Tuttle which was wending its way, at that time, through the constellation of Hercules, 27.4 light years from earth, I felt that I had, in fact, spotted it.
		I tracked Comet Swift-Tuttle using 10 x 70 binoculars in November 1992.
		I was in Montrose Park in Georgetown, Washington, DC, gazing at the western night sky when, in one of my binocular passes, I noticed a light gray blob.
	home1.gte.net /vze1recf/id4.html (112 words)

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