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Topic: 6489 Golevka

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	6489 Golevka
		The spectrum of 6489 Golevka was originally interpreted as a V-type, comparable to the class of what is thought to be achondritic asteroids associated with 4 Vesta.
		6489 Golevka was observed with NSFCAM on the NASA IRTF telescope on the nights of June 15 and 16 1999, obtaining several spectra.
		Asteroid 6489 Golevka is strikingly irregular and angular.
	www.geocities.com /zlipanov/selected_asteroids/6489_golevka/6489_golevka.html (660 words)

	Was ist Golevka?
		(6489) Golevka ist ein Asteroid oder Planetoid, aus der Gruppe der Apollo-Asteroiden.
		Golevka bewegt sich zwischen 0,9866 AU (Perihel) und 4,0096 AU (Aphel) auf einer stark exzentrischen Bahn in 3,94 Jahren um die Sonne.
		Golevka scheint ein massiver Felsbrocken zu sein, der das Überbleibsel einer Kollision darstellt.
	www.biologie.de /biowiki/Golevka (276 words)

	Astron. Astrophys. 362, 746-755 (2000)
		The shape model of Golevka, as derived from the radar observations, is very complex and impossible to fit with a ellipsoidal model (to which our theory is limited).
		Golevka is approximated with a spheroid with oblateness parameter
		Contrary to the Golevka example, the perturbation is now much larger and is dominated by the secular effect in the semimajor axis due to the albedo asymmetry (the short-periodic effect of the absorbed radiation pressure is negligible).
	aa.springer.de /papers/0362002/2300746/sc3.htm (2593 words)

	6489 Golevka
		6489 Golevka is an Apollo asteroid and also an Alinda asteroid discovered in 1991 by Eleanor Helin.
		In 1995 Golevka was studied simultaneously by three radar observatories across the world: Goldstone in California Evpatoria in Ukraine (sometimes written Yevpatoriya) and Kashima in Japan.
		In 2003 the Yarkovsky effect was first observed by high precision observations of Golevka.
	www.freeglossary.com /6489_golevka (485 words)

	6489 Golevka. 4 Feb 1997 submitted
		Furthermore, in the case of the Golevka infrared observations the STM is especially inappropriate, due to the large solar phase angle of ~90°.
		However, in the case of Golevka it is known that the latitude of the sub-Earth point at the time of the infrared observations was about -80°, while the sub-Solar latitude was almost equatorial.
		The analysis of the integral phase curve in terms of the Hapke photometric theory indicates a body whose surface is characterized by highly reflective and backscattering particles, confirms the presence of a sharp opposition effect at very small phase angles, and suggests a relatively smooth surface at macroscopic scales.
	solarsystem.dlr.de /SGF/earn/abstract/golevka.htm (6331 words)

	index.html
		Radar ranging from Arecibo, Puerto Rico, to the 0.5-kilometer near-Earth asteroid 6489 Golevka unambiguously reveals a small nongravitational acceleration caused by the anisotropic thermal emission of absorbed sunlight.
		The magnitude of this perturbation, known as the Yarkovsky effect, is a function of the asteroid's mass and surface thermal characteristics.
		Radar images of Golevka reveal a half-kilometer object whose shape is extraordinarily angular, with flat sides, sharp edges and corners, and peculiar concavities.
	echo.jpl.nasa.gov /~ostro/gol/index.html (469 words)

	"I go to prepare a place for you," the Circumcision of Scorpion Goddess.
		This is why Golevka has come to us in the years when a tyrannical regime was removed by a president's son with a compassionate conservative agenda.
		Golevka says, "Go Love Ka." It means love what you have been given, and pass on the Ka with love enhanced and righteous ambition for the generations to come.
		The omen of Golevka is that those who would get lost in Rational Convictions should remove the Block Head from their shoulders and kill the Bull that blocks reincarnation of the spirits of men long dead.
	www.siloam.net /rostau/08MAR2003/Aquarius/Victory/Golevka/index.html (13019 words)

	JPL News -- NASA Scientists Use Radar to Detect Asteroid Force
		Computer generated model of asteroid Golevka created with data taken by the Arecibo Observatory.
		Asteroid 6489 "Golevka" is relatively inconspicuous by near- Earth asteroid standards.
		Vokrouhlický led a 2000 study that predicted the possibility of detecting the subtle force acting on Golevka during its 2003 approach to Earth.
	www.jpl.nasa.gov /releases/2003/163.cfm (760 words)

	Scientists use radar to detect asteroid force (Site not responding. Last check: 2007-10-27)
		Asteroid 6489 "Golevka" is relatively inconspicuous by near-Earth asteroid standards.
		But as unremarkable as Golevka is on a celestial scale it is also relatively well characterized, having been observed via radar in 1991, 1995, 1999, and this past May. An international team of astronomers have used this comprehensive data set to make a detailed analysis of the asteroid's orbital path.
		Vokrouhlický led a 2000 study that predicted the possibility of detecting the subtle force acting on Golevka during its 2003 approach to Earth.
	oemagazine.com /newscast/121203_newscast01.html (612 words)

	[1.04] 6489 Golevka revisited: New evidence for a pyroxene-rich near-Earth asteroid.
		The spectrum of 6489 Golevka was originally interpreted as a V-type [Hicks & Grundy 1995, IAUC 6117], comparable to the class of what is thought to be achondritic asteroids associated with 4 Vesta and spanning the gulf to the 3:1 resonance [Binzel & Xu 1993 Science 260, 186].
		Though it is becoming quite obvious that a significant fraction of small Earth-approaching asteroids exhibit colors and spectra across visible wavelengths consistent with HED and ordinary chondritic meteorites, more work is needed at longer wavelengths to help resolve ambiguities in the interpretation of their spectra.
		6489 Golevka was observed with NSFCAM on the NASA IRTF telescope on the nights of June 15 and 16 1999, obtaining several spectra with both the IHJ "Asteroid" and K-grisms.
	www.aas.org /publications/baas/v31n4/dps99/444.htm (300 words)

	Database of Near-Earth Asteroids
		(Physical model of near-earth asteroid 6489 Golevka (1991 JX) from optical and infrared observations)
		(Radar observations and physical model of asteroid 6489 Golevka.)
		(Radar observations of near Earth asteroids 6489 Golevka and 4197 (1982 TA).)
	earn.dlr.de /nea/006489.htm (319 words)

	USATODAY.com - Supercomputer takes on a cosmic threat (Site not responding. Last check: 2007-10-27)
		Golevka isn't going to hit the Earth, explained Mark Boslough, a Sandia scientist and asteroid threat analyst.
		Keeping tabs on Golevka has helped pin down the Yarkovsky Effect — a miniscule amount of force produced as the asteroid absorbs energy from the Sun and re-radiates it into space as heat.
		Boslough said the actual geometry from radar measurements of asteroid Golevka were used in the computer simulations.
	www.usatoday.com /tech/science/space/2006-06-14-supercomputer-asteroid_x.htm (1037 words)

	News Article: Precision NEO Orbits and the Yarkovsky Effect (Site not responding. Last check: 2007-10-27)
		Asteroid 6489 "Golevka" is relatively inconspicuous by near- Earth asteroid standards.
		Vokrouhlicky led a 2000 study that predicted the possibility of detecting the subtle force acting on Golevka during its 2003 approach to Earth.
		Based on the strength of the detected perturbation, we estimate the bulk density of Golevka to be 2.7 (+0.4, -0.6) grams per cubic centimeter.
	nai.arc.nasa.gov /impact/news_detail.cfm?ID=132 (2006 words)

	6489 Golevka - Definition, explanation
		6489 Golevka is an Apollo, Mars-crosser and Alinda asteroid, discovered in 1991 by Eleanor F. Helin.
		Golevka is a small object, measuring 0.6×1.4 km.
		In 2003 the Yarkovsky effect was first observed at work by high precision radar observations of Golevka.
	www.calsky.com /lexikon/en/txt/6/64/6489_golevka.php (189 words)

	New Page 1
		For the computer runs, asteroid 6489 Golevka was chosen.
		Golevka has been of particular interest since 2003, when scientists discovered its course had changed.
		There are two strategies in the Golevka work: keeping the asteroid in one piece and changing its trajectory to miss the Earth, or blowing it to smithereens and making sure all bits miss the Earth.
	www.aaa.org /aaaeye0607art10.htm (2511 words)

	6489 Golevka
		Near-Earth asteroid 6489 Golevka (1991 JX) was discovered by Eleanor F. Helin at Palomar Observatory on May 10, 1991.
		It is named to honor the success of the multinational radar observations of it in June 1995.
		Intercontinental bistatic radar observations of 6489 Golevka (1991 JX).
	www.cplire.ru /html/ra&sr/sr/6489-Golevka.html (520 words)

	Nudging an asteroid
		Researchers generated this image of 6489 Golevka by measuring how radiowaves bounced off the asteroid's surface.
		Scientists have made a discovery about an asteroid named "6489 Golevka" that may help them to better predict asteroids' travel routes through the solar system.
		Steven Chesley of the Jet Propulsion Laboratory and his colleagues detected the Yarkovsky effect using radar measurements of 6489 Golevka taken by telescopes in Puerto Rico and California.
	www.eurekalert.org /features/kids/2003-12/aaft-naa020805.php (344 words)

	Supercomputer takes on a cosmic threat - Space.com - MSNBC.com (Site not responding. Last check: 2007-10-27)
		The simulation provided realism in the way cracks would form and propagate if the asteroid were a single, solid rock with strength.
		It is about a third of a mile (one half-kilometer) across, but tips the scales at about 460 billion pounds (210 billion kilograms), according to asteroid experts at the Jet Propulsion Laboratory in Pasadena, Calif.
		Keeping tabs on Golevka has helped pin down the Yarkovsky Effect — a minuscule amount of force produced as the asteroid absorbs energy from the sun and re-radiates it into space as heat.
	www.msnbc.msn.com /id/13321754/wid/6448213 (613 words)

	A Force With the Power to Move an Asteroid (Site not responding. Last check: 2007-10-27)
		Using powerful radar, scientists tracked the path of an asteroid named 6489 Golevka.
		Golevka is a near-Earth asteroid, which means that it comes within 121 million miles (195 million kilometers) of Earth.
		Using radar, scientists found that Golevka's path moved 10 miles (16 kilometers) in the last 12 years.
	news.nationalgeographic.com /kids/2004/01/asteroid.html (515 words)

	Yarkovsky effect - Wikipedia, the free encyclopedia
		The asteroid drifted 15 km from its predicted position over twelve years (the orbit was established with great precision by a series of radar observations in 1991, 1995 and 1999).
		In general, the effect is size dependent, and will affect the semi-major axis of smaller asteroids, while leaving large asteroids practically unaffected.
		For kilometre-sized asteroids the Yarkovsky effect is minuscule over short periods: 6489 Golevka is estimated to be subjected to a force of about 0.25 newton, for a net acceleration of 10
	en.wikipedia.org /wiki/Yarkovsky_effect (997 words)

	[No title] (Site not responding. Last check: 2007-10-27)
		At the time, Golevka was making its closest approach to Earth until 2046, about 3.1 million miles.
		Golevka, about three-tenths of a mile across at its widest spot, rotates about every six hours.
		"As radar tracking of near-Earth objects continues, Golevka is likely to be only the first of many objects with detectable Yarkovsky accelerations," said Steven Chesley, a JPL researcher who's the lead author of the new report.
	www.knoxstudio.com /shns/story.cfm?pk=ASTEROIDSUN-12-04-03&cat=AN (551 words)

	Scripps Howard News Service (Site not responding. Last check: 2007-10-27)
		At the time, Golevka was making its closest approach to Earth until 2046, about 3.1 million miles.
		Golevka, about three-tenths of a mile across at its widest spot, rotates about every six hours.
		"As radar tracking of near-Earth objects continues, Golevka is likely to be only the first of many objects with detectable Yarkovsky accelerations," said Steven Chesley, a JPL researcher who's the lead author of the new report.
	www.shns.com /shns/g_index2.cfm?action=detail&pk=ASTEROIDSUN-12-04-03 (574 words)

	NASA's Solar System Exploration: Science & Technology: Scientists Have Detected Sunlight's Gentle Nudge on Asteroids (Site not responding. Last check: 2007-10-27)
		This model of the half-kilometer near-Earth asteroid Golevka, color-coded for gravitational slope, is from Goldstone observations made in 1995.
		In 2003, the team's precise ranging revealed that Golevka was 15 kilometers further away than had been predicted by considering gravitational forces alone.
		The radar measurement was like a telescope in Los Angeles determining the distance to a basketball in New York with an uncertainty of half an inch, and finding that the basketball was 12 feet further than expected.
	solarsystem.nasa.gov /scitech/display.cfm?ST_ID=749 (474 words)

	Research Activities : Asteroid Radar Research (Site not responding. Last check: 2007-10-27)
		The radar echo was detected from the data received by the 34m antenna at Kashima on July 15, and it became the first success of the radar observation toward a solar system object in Japan.
		The asteroid was named as Golevka to honor the success of the radar experiment at Goldstone, at Evpatria (Ukrain) and at Kashima.
		The radar echo detected from the asteroid radar onbservations toward the asteroid 6489 Golevka (1991JX) from the data obtained by the 34m antenna at Kashima on July 15, 1995.
	www2.nict.go.jp /w/w114/stsi/old_raag/asteroid.html (338 words)

	Very Close Approach by Asteroid 4179 Toutatis: It's Not a Crisis, It's an Opportunity - Planetary News \| The Planetary ...
		They determined that the Yarkovsky effect had deflected little Golevka by about 16 kilometers (10 miles) from its predicted path in 12 years, which allowed them to fix Golevka's density.
		The density was low -- much lower than that of most asteroids -- meaning that Golevka is likely a fractured object containing a significant amount of open pore space.
		For Toutatis, Ostro hopes to find a higher density, because if the density he finds is high enough, it would be possible to exclude chondritic compositions and say for sure that Toutatis is a stony-iron object.
	www.planetary.org /news/2004/0927_Very_Close_Approach_by_Asteroid_4179.html (1508 words)

	wissenschaft.de - Temperaturschwankungen werfen kleine Asteroiden aus der Bahn
		Amerikanische Forscher konnten dieses Phänomen, das in der Theorie als Yarkovsky-Effekt“ bekannt ist, jetzt erstmals am Asteroiden 6489 Golevka nachweisen.
		Meteoriten aus der Gruppe der Chondriten, zu denen Golevka gehört, haben gewöhnlich eine etwas höhere Dichte.
		Das bedeutet, dass Golevka wahrscheinlich eine hohe Porosität besitzt und von Brüchen durchzogen ist.
	www.wissenschaft.de /wissen/news/233247.html (288 words)

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