
	Where results make sense

Topic: Comet Hyakutake

Related Topics

Yuji Hyakutake

1996 in science

Apparent magnitude

Carl Sagan

Hellmuth Walter

John Farnham

Rent (musical)

1996

Bartel Leendert van der Waerden

Saguenay River

List of astronomers

Darlie Routier

Tennessee

9th century

Saguenay, Quebec

In the News (Fri 1 Jun 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	ROSAT Image of Comet Hyakutake
		The strength of the X-ray emission from Comet Hyakutake took the astronomers by surprise, and they are also puzzled by the rapid changes in their intensity.
		The comet was detected repeatedly during March 26-27 as it swept across the sky at a rate equivalent to crossing twice the diameter of the full Moon in an hour.
		Comet Hyakutake was discovered on January 30, 1996, and was subsequently approved as a Target of Opportunity for ROSAT, which means that the regular schedule of satellite operations was reorganized to enable the observations of the comet.
	heasarc.gsfc.nasa.gov /docs/rosat/hyakutake.html (838 words)

	CalendarHome.com - - Calendar Encyclopedia (Site not responding. Last check: )
		By March 24, the comet was one of the brightest objects in the night sky, and its tail stretched 35 degrees.
		Hyakutake was moving so rapidly across the night sky that its movement could be detected against the stars in just a few minutes; it covered the diameter of a full moon (half a degree) every 30 minutes.
		Observations of Comet LINEAR with the Chandra satellite in 2000 determined that X-rays observed from that comet were produced predominantly by collisions between nitrogen and oxygen ions in the solar wind and neutral hydrogen in the comet's coma.
	encyclopedia.calendarhome.com /cgi-bin/encyclopedia.pl?p=Comet_Hyakutake (2316 words)

	Comet Hyakutake
		Comet Hyakutake was found on January 30, 1996 by a man in Japan named Yuji Hyakutake.
		Finding these usual molecules in a comet suggests that comet Hyakutake may be a new type of comet.
		An abundance of ethane comparable to that of methane implies that comet Hyakutake must have experienced very different conditions during its birth than other comets that do not contain ethane.
	www.windows.ucar.edu /tour/link=/comets/Hyakutake.html (210 words)

	Comet Hyakutake - ArticleWorld (Site not responding. Last check: )
		The observation of this comet led to many discoveries as it was able to be studied at a closer range than any other comet in the past 200 years.
		One discovery was of the X-rays emitted from the comet and believed to be caused by ionized solar wind particles that interacted with neutral atoms in the coma of the comet.
		When the comet became visible to the naked eye in March of 1996 it seemed unremarkable as it was not very bright however as it approached closer to Earth it rapidly became brighter and the tail grew in length.
	www.articleworld.org /index.php/Comet_Hyakutake (412 words)

	SPACE.com -- Heart Attack Claims Life of Comet Finder Yuji Hyakutake, 51
		Hyakutake, 51, died Wednesday of a rupture of the main artery at a hospital in Japan shortly after becoming ill, according to press reports.
		Hyakutake was self-taught and hunted comets only as a hobby, often using binoculars at his home observatory.
		Comet Hyakutake has the longest tail that I have ever observed, although the new Hubble images show that this comet is breaking into fragments.
	www.space.com /news/yugi_hyakutake_020411.html (886 words)

	Comet Hyakutake
		Hyakutake, unlike Comet Hale-Bopp, was formed in interstellar space.
		Although many comets have approached closer (in 1491 AD a comet came within about 1.4 million km) Hyakutake was the brightest comet to come so close to Earth in the past 440 years or so, according to Fred Schaaf.
		On 26 March 1996, Hyakutake was about 0.107 AU from Earth, and two condensations were observed behind the nucleus, one about 1250 km behind (antisunward) the nucleus, and another dimmer one about 3500 km behind the nucleus.
	www.valdostamuseum.org /hamsmith/hyaku.html (717 words)

	COMET HYAKUTAKE
		Comet Hyakutake was due to pass close to the Earth in March 1996 on its way to perihelion.
		As the comet approached perihelion, it started to fade and it was realised that the fantastic display had been the result of a disruption to the nucleus.
		Comet Hyakutake was without a doubt, the most spectacular comet I have observed in over 35 years of comet observing.
	www.montgomerycollege.edu /~mclark/hak.htm (747 words)

	NOVA Online \| Doomsday Asteroid \| Hale-Bopp and Hyakutake
		Setting spectroscopic instruments to exclude all light from the comet except the yellow light emitted by sodium atoms, the scientists were surprised to see a narrow third tail located near the ion tail.
		In the spring of this year, shortly after comet Hyakutake was discovered, the scientific community swung into action.
		The Hubble images emphasized the ``heart'' of the comet, the region near the nucleus, while wide-field pictures were dominated by light from the outer coma and tails.
	www.pbs.org /wgbh/nova/spacewatch/comets.html (989 words)

	Comet for Windows - Observation of Comet Hyakutake
		Comet Hyakutake passed close by the earth in late March, 1996.
		The motion of the comet was very fast at that time, and the condition of observation had been changing day by day.
		The magnitude of a comet is determined by comparing the brightness with those of stars around the comet in observation.
	www.aerith.net /project/comet/tutorial/Hyakutake.html (2791 words)

	Comet Hyakutake a Once-In-Many-Lifetimes Event, Alaska Science Forum
		Early on, the comet was about as bright as the faintest star in the Big Dipper, but it brightened as the comet continued its egg-shaped orbit around the sun.
		In fact, the word "comet" is derived from the Creek word "kometes," (hairy) which refers to a comet's tail of plasma and dust.
		Because unexpected comets can appear as suddenly as Hyakutake and Hale-Bopp both did, any amateur astronomer has a chance of having his or her name attached to a dirty snowball floating around the heavens for thousands of years.
	www.gi.alaska.edu /ScienceForum/ASF12/1277.html (592 words)

	Astronomy and Earth Science: Comet Hyakutake
		A comet in the sky was blamed for the eruption of Mount Vesuvius in 1631.
		Comet Hyakutake has been moving rapidly through the skies, moving from Scorpius, in the south, all the way over to where it will be best viewed near a group of stars nearly everyone can find, the Big Dipper.
		Comet Hyakutake can be found between the Big and Little Dippers on the nights of the 25th and the 26th when it will be at its brightest.
	starryskies.com /articles/dln/3-96/spcomet.html (643 words)

	Comet Hyakutake Fact Sheet
		Comet Hyakutake, discovered last January by a Japanese astronomer, is already visible to the naked eye when observed from a site far from city lights.
		At its best, Comet Hyakutake is going to be a fairly rich spot of milk, but spread out to about four times the width of the full moon.
		Comet Hale-Bopp, another promising comet, lies in the constellation Sagittarius, and will be bright enough to spot with binoculars this summer.
	www.uwm.edu /News/comet/fact_sheet.html (1334 words)

	A Comet's Long Tail Tickles Ulysses: Science News Online, April 8, 2000
		Using the velocity of the solar wind, the team calculated that 8 days earlier, Comet Hyakutake had been more than half a billion kilometers distant, yet in the right place—along the line connecting the sun and the spacecraft—to have generated the ions.
		Comets are prime suspects in such behavior: The high density of ions near the core of a comet is highly effective at slowing the solar wind.
		This geometry is characteristic of a rapidly moving comet, such as Hyakutake, at its closest approach to the sun.
	www.sciencenews.org /20000408/fob1.asp (778 words)

	Detection of Acetylene in Comet Hyakutake (Site not responding. Last check: )
		The astronomers observed Comet Hyakutake with a high spectral resolution spectrograph attached to the NASA Infrared Telescope Facility at Mauna Kea, Hawaii, on April 8.
		The abundance of acetylene in Comet Hyakutake was estimated to be between 0.3 to 0.9% that of water vapor, or 3 to 9 acetylene molecules for every 1000 water molecules.
		As the comet approached the sun, acetylene vapor was released from the ice in the nucleus of the comet.
	stardust.jpl.nasa.gov /news/acetylen.html (537 words)

	Comet Hyakutake Home Page (JPL)
		On January 30, 1996, Yuji Hyakutake in Japan discovered a new comet using 25x150 binoculars.
		As subsequent observations of the new comet were obtained, Brian Marsden from the IAU Central Bureau was able to compute the comet's orbital elements, and these computations indicated that the comet will pass as close as 0.10 AU (9.3 million miles) from the Earth on March 25, 1996!
		Comet Hyakutake Flees Far South (Sky & Telescope - May 1996).
	www.jpl.nasa.gov /comet/hyakutake (329 words)

	Photographs of Comet Hale-Bopp and Comet Hyakutake
		Comet Hyakutake (1996) and Comet Hale-Bopp (1997) were thebrightest comets to appear since Comet West in 1976.
		The comet was visible to the naked eye for over two months (March through May, 1997), but on the nights of March 22 through March 28, 1996, Comet Hyakutake put on aspectacular show for viewers in the Northern Hemisphere as it passed nearest to earth (0.1 a.u.).
		This comet was exceptionally large as far as comets go, but it never got particularly close to the earth for a comet passing through the inner solar system.
	www.uc.edu /geology/geologylist/cometphotos.html (1496 words)

	Comet Hyakutake Radar Results (Site not responding. Last check: )
		The nucleus of Comet Hyakutake, observed by radar at a distance of 16 million kilometers (10 million miles) on March 24 and 25, is apparently 1-3 kilometers (less than 2 miles) across, a NASA radar scientist reported.
		Ostro pointed out that five other comets have been detected in the NASA radar astronomy program, but this is the first comet radar detection since Halley was observed from the Arecibo radar telescope in 1985.
		The power in the echo received from the comet was less than one billionth of a billionth of a milliwatt.
	echo.jpl.nasa.gov /asteroids/public/current_events/hyak/hyak.html (349 words)

	Comet Hyakutake Research at Lowell Observatory (Site not responding. Last check: )
		Comet Hyakutake (1996 B2) was discovered 30 January 1996 by Yuji Hyakutake using binoculars.
		In addition, the photometry obtained throughout the apparition was used by Schleicher and Osip to examine the heliocentric distance dependences of the production rates, and determine gas abundance ratios, dust colors, and the effective active area as a function of time.
		The modeling yields the pole orientation of the nucleus, with an obliquity of 108° with respect to Hyakutake's orbital plane (for comparison, the Earth's obliquity is 23.5°).
	www.lowell.edu /Research/Projects/hyakutake_research/hyaresearch.html (814 words)

	Comet Hyakutake (C/1996 B2) : Hubble Space Telescope
		Observations of comet Hyakutake, the great comet of 1996, were made on April 4, 1996, using three of the instruments on the Hubble Space Telescope to study water photochemistry.
		The comet's Lyman-alpha emission (marked "Comet" to the right) is centered at the comet's redshifted velocity of about 53 kilometers per second, showing the comet's speed relative to the Earth on that day.
		The width of the comet line is indicative of the velocities of hydrogen atoms in the coma, some of which are in excess of 20 kilometers per second.
	www-personal.umich.edu /~mcombi/HST/hyaku.html (833 words)

	Comet Hyakutake (Site not responding. Last check: )
		Comet Hyakutake became the most active comet in the past 400 years to come so close to Earth.
		As Comet Hyakutake approached the Sun, jets of dust erupted from the Sun-facing side of its nucleus.
		On March 24, 1996, three small pieces of Comet Hyakutake broke off and started to form their own tails, as hinted at in the third frame from the right.
	www.aspsky.org /education/tnl/36/hya.html (264 words)

	IfA -- Comet Hyakutake Images (Site not responding. Last check: )
		Comet Hyakutake (1996 B2) imaged at the University of Hawaii 2.2 meter telescope on UT 1996 March 23.
		Thus, the jets indicate that, like the nuclei of previously studied short-period comets, the nucleus of Hyakutake (B2) is mantled by involatile material, with only a few active patches of exposed ice.
		March 16, 1996 (UT) R-band image of Comet Hyakutake from the Canada-France-Hawaii Telescope using a 8192x8192 CCD camera, mounted at the prime focus.
	www.ifa.hawaii.edu /images/hyakutake (424 words)

	Comet Hyakutake (C/1996 B2) : Hubble Space Telescope
		Observations of comet Hyakutake, the great comet of 1996, were made on April 4, 1996, using three of the instruments on the Hubble Space Telescope to study water photochemistry.
		The comet's Lyman-alpha emission (marked "Comet" to the right) is centered at the comet's redshifted velocity of about 53 kilometers per second, showing the comet's speed relative to the Earth on that day.
		The width of the comet line is indicative of the velocities of hydrogen atoms in the coma, some of which are in excess of 20 kilometers per second.
	www-personal.engin.umich.edu /~mcombi/HST/hyaku.html (833 words)

	SPACE.com -- Naked-Eye Comet Possible for Christmas 2001
		A comet detected three months ago is ambling toward the inner solar system and could be visible to the naked eye late this year, possibly providing the best comet show since Hale-Bopp in 1997.
		Comets are made mostly of dust and gas, primarily carbon dioxide, ammonia and methane.
		This scenario will be similar to Comet Hyakutake in 1996, which was estimated to be about the same size and came within 9.3 million miles (15 million kilometers) of our planet.
	www.space.com /scienceastronomy/solarsystem/xmas_comet_010223.html (1029 words)

	COMET HYAKUTAKE (Site not responding. Last check: )
		Comet Hyakutake (formally C/1996 B2) was discovered by Hyakutake, on January 30, 1996.
		The comet made its closest approach to the Earth (~0.109AU) in March 1996, at which time it was a naked-eye object throughout the northern hemisphere.
		Based on the Ulysses encounter, the comet's tail is known to have been at least 300 million miles long.
	www.websters-online-dictionary.org /definition/COMET+HYAKUTAKE (133 words)

Try your search on: Qwika (all wikis)