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Topic: 3753 Cruithne

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	3753 Cruithne - Wikipedia, the free encyclopedia
		The Cruithne emigrated from the European continent and appeared in Britain between about 800 and 500 B.C. Cruithne is approximately 5 km in diameter, and its closest approach to Earth is 12 Gm (million kilometres; approximately 30 times the separation between Earth and the Moon).
		Cruithne's semi-major axis alters as it is perturbed by periodic close encounters with the Earth
		Cruithne's distance from the Sun and orbital speed vary a lot more than the Earth's, so from our point of view Cruithne actually follows a kidney bean shaped path ahead of us, taking slightly less than one year to complete a circuit of the bean.
	en.wikipedia.org /wiki/3753_Cruithne (738 words)

	Cruithne (people) - Wikipedia, the free encyclopedia
		The Cruithne or Cruthin were a historical people known to have lived in Ireland, particularly in Ulster, in early medieval times.
		O'Rahilly's historical model, the Cruithne were descended from the Priteni, who O'Rahilly argues were the first Celtic group to inhabit the British Isles, and identifies with the Picts of Scotland.
		Cruithne is the name of the Picts in Scottish Gaelic.
	en.wikipedia.org /wiki/Cruithne_(people) (250 words)

	Learn more about 3753 Cruithne in the online encyclopedia. (Site not responding. Last check: 2007-09-18)
		3753 Cruithne is an asteroid with the catalogue number 3753 that is currently in an unusual orbit related to that of Earth.
		Cruithne is approximately 5 km in diameter, and its closest approach to Earth is 15 million kilometers (approximately 40 times the separation between Earth and Luna).
		Although Cruithne's orbit is not thought to be stable over the long term, there is no danger of it colliding with the Earth in any forseeable future.
	www.onlineencyclopedia.org /3/37/3753_cruithne.html (515 words)

	Encyclopedia: 3753 Cruithne
		Cruithne was discovered on October 10, 1986, by J. Duncan Waldron, working with Robert H. McNaught, Malcolm Hartley and Michael R. S Hawkins at Siding Spring Observatory, Coonabarabran, Australia.
		The Cruithne emigrated from the European continent and appeared in Britain between about 800 and 500 B.C. This article is about the European people.
		Cruithne is approximately 5 km in diameter, and its closest approach to Earth is 12 Gm (million kilometres; approximately 30 times the separation between Earth and the Moon).
	www.nationmaster.com /encyclopedia/3753-Cruithne (3343 words)

	Cruithne, Earths "second moon"
		Many thanks to Graeme Waddington who supplied the xyz coordinates of Cruithne and the planets as of February 26 2000, and Paul Wiegert, Kimmo Innanen, and Seppo Mikkola whose research is responsible for most of what we know about Cruithne.
		Cruithne also has an orbit of almost one year, that's why consecutive purple dots are close to one another.
		Cruithne has an orbit slightly less than a year at first, then when it approaches Earth it slows down to slightly more than a year, and back and forth and back and forth.
	burtleburtle.net /bob/physics/cruithne.html (620 words)

	Near-Earth Asteroid 3753 Cruithne
		The near-Earth asteroid 3753 Cruithne is in an unusual orbit about that of the Earth, one which is known in the lingo of celestial mechanics as being co-orbital with the Earth (meaning it shares the Earth's orbit with it) and, more particularly, as being of the "horseshoe" type.
		The high inclination of Cruithne's orbit relative to that of the other planets is clear from these vantage points, and is what causes it to avoid collisions.
		The relative motions of 3753 Cruithne and the Earth are shown.
	www.astro.uwo.ca /~wiegert/3753/3753.html (2229 words)

	3753 Cruithne - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-09-18)
		3753 Cruithne is an asteroid which accompanies Earth in its orbit.
		The Cruithne emigrated from the European continent and appeared in Britain between about 800 and 500 B.C. They were also known as the Picts.
		Cruithne is approximately 5 km in diameter, and its closest approach to Earth is 15 million kilometres (approximately 40 times the separation between Earth and the Moon).
	www.peacelink.de /keyword/3753_Cruithne.php (474 words)

	Asteroid 3753 Cruithne Aspects & Distances (Site not responding. Last check: 2007-09-18)
		When Cruithne is at perihelion, from Earth it appears to be conjunct the Sun, and six months later, at aphelion, from Earth Cruithne appears opposite the Sun.
		Year by year the shape expands, showing that Cruithne is reaching further and further away from earth, and being seen in more and more of the zodiac.
		In the time-period 1994-5, the kidney-shaped yearly motion of Cruithne moved past the Earth, so that the orbit does not come near the Earth, and this is the first time since around 1810.
	ephemeral.info /txt/cruithne3753.cgi (907 words)

	Near-Earth Asteroid 3753 Cruithne FAQ
		The fact that Cruithne accompanied the Earth in its orbit was revealed by computer simulations of the near-Earth asteroids performed during early 1997.
		However, in the case of Cruithne, the Earth and the asteroid both share the same orbit about the Sun, but are choreographed in such a away as to remain stable and avoid colliding with each other.
		Though Cruithne is unlikely to remain stable in its current orbit indefinitely, the possibility of a collision over at least the next ten thousand years is nil.
	myhome.naver.com /dudwn1109/cruithne/Cruithne_FAQ.htm (1862 words)

	threemoons
		Cruithne orbits the sun in an ellipse once a year, viewed from the earth this ellipse becomes a kidney bean shape.
		Cruithne's orbit over a year in a reference frame orbiting with the earth.
		Cruithne's orbit relative to earth drifts around, after 190 years it circles the earth from the other side.
	www.exo.net /~pauld/activities/astronomy/threemoons.html (1378 words)

	MOSAC - Scienza & Conoscenza (Site not responding. Last check: 2007-09-18)
		Cruithne, this is the name of the new "companion" of our placet recently discovered.
		During the studies on new NEA tracks it has been discovered that 3753 Cruithne moves on a very strange orbit that is almost similar to that of the Earth.
		The inclination of 3753 Cruithne together with it's own bean shaped orbit makes the problem more complex: adding up both the horseshoe and the bean shaped motion we can get to explain in some way the real orbit of our "new moon".
	www.mosac.com /astronomia/articoli/index_ensp.php?name=cruithne_en.html (654 words)

	3753 Cruithne : Cruithne
		3753 Cruithne is an asteroid with the catalogue number 3753 that is currently in an unusual orbit near Earth.
		It is much easier to understand by recognizing that from the Sun's frame of reference Cruithne follows a relatively conventional orbit which takes almost exactly the same time to complete as Earth (one year), but which is slightly more elliptical.
		Although Cruithne's orbit isn't thought to be stable over the long term, there is no danger of it colliding with the Earth in any forseeable future.
	www.fastload.org /cr/Cruithne.html (415 words)

	Cruithne - is it our second moon? - Above Top Secret Conspiracy Community
		Cruithne, discovered in 1986, and then found in 1997 to have a highly eccentric orbit, cannot be seen by the naked eye, but scientists working at Queen Mary and Westfield College in London were intrigued enough with its peregrinations to come up with mathematical models to describe its path.
		Cruithne is just a captured asteroid between the earth's and the sun's gravities.
		Cruithne is sharing the earth's orbit around the sun and as others have said, it does not revolve around the earth.
	www.abovetopsecret.com /forum/thread73878/pg (1016 words)

	Cruithne - Earth's Kid Sister? - Astrology in the Age of Aquarius - UK Mirror
		Cruithne is about three miles in diameter and it moves in a path that takes it from outside the orbit of Mars towards the orbit of Mercury.
		Fortunately the orbit of Cruithne is inclined by about 20 degrees, so collisions are unlikely - at least according to its orbit as understood at present.
		Cruithne is much more like a tiny sister to the Earth, orbiting the Sun with much the same period.
	www.achernar.btinternet.co.uk /cruithne.html (1338 words)

	Re: [meteorite-list] There IS an Earth Trojan Asteroid (probably)!
		While Cruithne is in 1:1 resonance with Earth, and that is interesting, it does not mean they share an orbit.
		Note again that Cruithne's > horseshoe is composed of tightly wound kidney-bean shaped spirals which > are almost impossible to distinguish individually in the picture.
		Cruithne > > and Earth do not share an orbit, and they are in separate orbits > > around the Sun.
	www.mail-archive.com /meteorite-list@meteoritecentral.com/msg35933.html (998 words)

	One-to-One Resonance
		The Asteroid 3753 Cruithne created quite a lot of excitement when it was discovered in 1997 to be co-orbital with Earth.
		Note how Cruithne come quite close to Earth once each year but the distance of these close approaches is slowly increasing from year to year.
		The apparent 'kidney - shaped' orbit of Cruithne is due to Cruithne's eccentric orbit.
	www.myastrostuff.com /simulation/coorbital.htm (866 words)

	Cruithne (minor planet 3753)
		Its path is highly inclined and horseshoe-shaped with respect to Earth, causing Cruithne to alternatively move closer to and then much further away from us.
		It was discovered in 1986, by D. Waldron at Siding Spring Observatory, Coonabarabran, Australia, and named for the first Celtic tribal group that settled in the British Isles.
		Two other near-Earth asteroids are known to be currently in resonant states similar to that of Cruithne: 1998 UP1 and 2000 PH5.
	www.daviddarling.info /encyclopedia/C/Cruithne.html (187 words)

	3753 Cruithne
		It was officially discovered on October 10, 1986, by J. Duncan Waldron, working with Robert H. McNaught, Malcolm Hartley and Michael R. S Hawkins at Siding Spring Observatory, Coonabarabran, Australia.
		The Cruithne emigrated from the European continent and appeared in Britain between about 800 and 500 B.C. The correct pronunciation for 'Cruithne' is 'croo-een-ya', with the emphasis on the -een-.
		Although Cruithne's orbit is not thought to be stable over the long term, there is no danger of it colliding with the Earth in the foreseeable future.
	www.brainyencyclopedia.com /encyclopedia/3/37/3753_cruithne.html (525 words)

	3753 Cruithne (Site not responding. Last check: 2007-09-18)
		Asteroid 3753 Cruithne, an asteroid closely associated with Earth which orbits in its orbit almost like a second Moon, was discovered on October 10, 1986, at Siding Spring Observatory at Coonabarabran, New South Wales, Australia, by J.D. Waldron.
		Waldron named it for the mythological ancestor of the Scottish people, who have also been called by the name Cruithne (which is Irish Gaelic for "corn eater" or "people of the pictures" and is pronounced CREEN-ya).
		Astrologically, Cruithne indicates sense of connectedness to ethnic, regional or racial roots or to the land or earth; ethnic or racial pride; environmentalism; clinging to core identity; stigma.
	www.geocities.com /mahtezcatpoc/cruithne.html (256 words)

	A/CC Catalog: Asteroids 500-3999
		The population of near-Earth asteroids in coorbital motion with the Earth.
		AKA: 1983 UH, 1986 TO 3753 Cruithne has one of the most bizarre orbits known, making it a companion of the Earth but not a satellite, and never getting closer than about 40 lunar distances.
		"Cruithne" is also sometimes described as being another name for the Picts, but, from what history has survived, that would appear to be overly simplistic.
	www.hohmanntransfer.com /cat/an2.htm (1988 words)

	The Starry Skies of Anton Vamplew: Cruithne
		3753 Cruithne was suddenly announced as our second moon - but it is in no real way a moon of the Earth.
		The Sun is the dot in the centre, the pinkish circle is the orbit of Mercury, the green is Venus, the blue is us, the Earth and red shows the orbit of Mars.
		Images and information have been adapted from Paul Wiegert's excellent article Near-Earth asteroid 3753 Cruithne --Earth's curious companion--.
	www.captaincosmos.clara.co.uk /cruithne.html (499 words)

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