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Griqua Asteroid
A Hecuba-gap asteroid is a member of a dynamical group of resonant asteroids located in the Hecuba gap at 3.27 AU – one of the largest Kirkwood gaps in the asteroid belt, which is considered the borderline separating the outer main belt asteroids from the Cybeles. A Hecuba-gap asteroid stays in a 2:1 mean motion resonance with the gas giant Jupiter, which may gradually perturbe its orbits over a long period until it either intersect with the orbit of Mars or Jupiter itself. Depending on the dynamical stability of an asteroid's orbit in the Hecuba gap, three subgroups have been proposed. These are the marginally unstable Griqua asteroids, with an estimated lifetime of more than 100 million years, the stable Zhongguo asteroids (more than 500 million or even 1 billion years), and an unnamed, strongly unstable population of asteroids with a dynamical lifetime of less than 70 million years. Moving further out the Solar System, the asteroids in the Hecuba gap are followed by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Minor-planet Groups
A minor-planet group is a population of minor planets that share broadly similar orbits. Members are generally unrelated to each other, unlike in an asteroid family, which often results from the break-up of a single asteroid. It is customary to name a group of asteroids after the first member of that group to be discovered, which is often the largest. Groups out to the orbit of Earth There are relatively few asteroids that orbit close to the Sun. Several of these groups are hypothetical at this point in time, with no members having yet been discovered; as such, the names they have been given are provisional. * Vulcanoid asteroids are hypothetical asteroids that orbit entirely within the orbit of Mercury (have an aphelion of less than 0.3874 AU). A few searches for vulcanoids have been conducted but none have been discovered so far. * ꞌAylóꞌchaxnim asteroids (previously named Vatira) are asteroids that orbit entirely within the orbit of Venus (have an aphelion of less ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thule Asteroid
Thule, minor planet designation: 279 Thule, is a large asteroid from the outer asteroid belt. It is classified as a D-type asteroid and is probably composed of organic-rich silicates, carbon and anhydrous silicates. Thule was the first asteroid discovered with a semi-major axis greater than 4 AU. It was discovered by Johann Palisa on 25 October 1888 in Vienna and was named after the ultimate northern land of Thule. Thule asteroids Thule was the first discovered member of the ''Thule dynamical group'', which as of 2008 is known to consist of three objects: 279 Thule, , and . The orbits of these bodies are unusual. They orbit in the outermost edge of the asteroid belt in a 4:3 orbital resonance with Jupiter, the result of the periodic force Jupiter exerts on a body with Thule's orbital period, in the same way (though with the reverse effect) as the Kirkwood gaps in the more inner parts of the asteroid belt. References External links * * Thule asteroids Back ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14871 Pyramus
14871 Pyramus, provisional designation , is a dark Zhongguo asteroid from the outermost region of the asteroid belt, approximately in diameter. It was discovered on 13 October 1990 by German astronomers Lutz Schmadel and Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Germany. The asteroid was named for Pyramus from classical mythology. Orbit and classification ''Pyramus'' is a non-family asteroid from the main belt's background population. It is a member of the small group of Zhongguo asteroids, located in the 2 : 1 mean motion resonance with the giant planet Jupiter. Contrary to the nearby unstable Griqua group, the orbits of the Zhongguos are stable over half a billion years. It orbits the Sun in the outer main-belt at a distance of 2.6–4.0 AU once every 6.00 years (2,192 days; semi-major axis of 3.3 AU). Its orbit has an eccentricity of 0.22 and an inclination of 1 ° with respect to the ecliptic. The first precovery was taken at Palom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
11573 Helmholtz
11573 Helmholtz, provisional designation , is a Zhongguo asteroid from the outermost region of the asteroid belt, approximately in diameter. It was discovered on 20 September 1993, by German astronomers Freimut Börngen and Lutz Schmadel at the Karl Schwarzschild Observatory in Tautenburg, Germany. It is one of few asteroids located in the 2:1 resonance with Jupiter. The asteroid was named for German physicist Hermann von Helmholtz. Orbit and classification ''Helmholtz'' is a non-family asteroid from the main belt's background population. It is a member of the small group of Zhongguo asteroids, located in the Hecuba gap (2:1 mean motion resonance with Jupiter) near 3.27 AU. Contrary to the nearby unstable Griqua group, the orbits of the Zhongguos are stable over half a billion years. It orbits the Sun in the outer main-belt at a distance of 2.4–4.1 AU once every 5 years and 11 months (2,148 days; semi-major axis of 3.26 AU). Its orbit has an eccentricity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
11266 Macke
Eleven or 11 may refer to: *11 (number), the natural number following 10 and preceding 12 * one of the years 11 BC, AD 11, 1911, 2011, or any year ending in 11 Literature * ''Eleven'' (novel), a 2006 novel by British author David Llewellyn *''Eleven'', a 1970 collection of short stories by Patricia Highsmith *''Eleven'', a 2004 children's novel in The Winnie Years by Lauren Myracle *''Eleven'', a 2008 children's novel by Patricia Reilly Giff *''Eleven'', a short story by Sandra Cisneros Music * Eleven (band), an American rock band * Eleven: A Music Company, an Australian record label *Up to eleven, an idiom from popular culture, coined in the movie ''This Is Spinal Tap'' Albums * ''11'' (The Smithereens album), 1989 * ''11'' (Ua album), 1996 * ''11'' (Bryan Adams album), 2008 * ''11'' (Sault album), 2022 * ''Eleven'' (Harry Connick, Jr. album), 1992 * ''Eleven'' (22-Pistepirkko album), 1998 * ''Eleven'' (Sugarcult album), 1999 * ''Eleven'' (B'z album), 2000 * ''Eleven'' (Reamo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3789 Zhongguo
3789 Zhongguo, provisional designation ', is a resonant asteroid from outermost region of the asteroid belt, approximately in diameter. It was discovered in 1928 by Chinese astronomer Zhang Yuzhe at the Yerkes Observatory in Williams Bay, Wisconsin, in the United States. Originally named "China", the asteroid became lost and its name was transferred to another asteroid. After its re-discovery in 1986, it was named Zhongguo, which is the Chinese word for "China". The T/ X k-type asteroid is the namesake of the resonant Zhongguo group, located in the asteroid belt's Hecuba gap. It has a short rotation period of 3.8 hours. Discovery and re-discovery While studying in Chicago, Chinese astronomer Zhang Yuzhe observed an unknown asteroid, provisionally designated ' for the first time on 25 October 1928. After it was (prematurely) given the number 1125, he named it "China" or "中国" (''Zhōngguó'') in honor of his native country. As it was not observed beyond its initi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3789 Zhongguo
3789 Zhongguo, provisional designation ', is a resonant asteroid from outermost region of the asteroid belt, approximately in diameter. It was discovered in 1928 by Chinese astronomer Zhang Yuzhe at the Yerkes Observatory in Williams Bay, Wisconsin, in the United States. Originally named "China", the asteroid became lost and its name was transferred to another asteroid. After its re-discovery in 1986, it was named Zhongguo, which is the Chinese word for "China". The T/ X k-type asteroid is the namesake of the resonant Zhongguo group, located in the asteroid belt's Hecuba gap. It has a short rotation period of 3.8 hours. Discovery and re-discovery While studying in Chicago, Chinese astronomer Zhang Yuzhe observed an unknown asteroid, provisionally designated ' for the first time on 25 October 1928. After it was (prematurely) given the number 1125, he named it "China" or "中国" (''Zhōngguó'') in honor of his native country. As it was not observed beyond its initial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
13963 Euphrates
13963 Euphrates (), provisional designation , is a resonant Griqua asteroid from the outer region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 3 August 1991, by Belgian astronomer Eric Elst at ESO's La Silla Observatory site in Chile. The asteroid was named after the Euphrates River in the Middle East. Orbit and classification ''Euphrates'' is one of very few bodies located in the 2:1 mean motion resonance with the gas giant Jupiter and belongs to the "marginally unstable" Griqua group. It orbits the Sun in the outer main-belt at a distance of 2.5–4.2 AU once every 6 years and 1 month (2,220 days). Its orbit has an eccentricity of 0.26 and an inclination of 1 ° with respect to the ecliptic. A first precovery was taken at Palomar Observatory in 1971, extending the asteroid's observation arc by 20 years prior to its official discovery observation. Physical characteristics Based on an absolute magnitude of 13.9, it measures bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
11665 Dirichlet
11665 Dirichlet, provisional designation , is a Griqua asteroid and a 2:1 Jupiter librator from the outermost regions of the asteroid belt, approximately in diameter. It was discovered on 14 April 1997, by astronomer Paul Comba at the Prescott Observatory in Arizona, United States. The asteroid was named after German mathematician Peter Gustav Lejeune Dirichlet. Orbit and classification ''Dirichlet'' is a Griqua asteroid, a small dynamical group of asteroids located in the otherwise sparsely populated Hecuba gap (2:1 resonance with Jupiter), which is one of the largest Kirkwood gaps in the asteroid belt. It orbits the Sun at a distance of 2.8–3.8 AU once every 5 years and 11 months (2,169 days; semi-major axis of 3.28 AU). Its orbit has an eccentricity of 0.15 and an inclination of 16 ° with respect to the ecliptic. The body's observation arc begins prior to its official discovery observation with a precovery taken by Spacewatch in October 1994. Naming Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4177 Kohman
4177 Kohman, provisional designation , is a resonant Griqua asteroid from the outermost regions of the asteroid belt, approximately in diameter. It was discovered on 21 September 1987, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory near Flagstaff, Arizona, in the United States. The asteroid was named for American nuclear chemist Truman Kohman. Orbit and classification ''Kohman'' is a non-family asteroid from the main belt's background population, and a member of the small group of Griqua asteroids, located in the Hecuba gap and locked in a 2:1 mean-motion resonance with the gas giant Jupiter. Contrary to the nearby Zhongguo asteroids, the orbits of the Griquas are less stable with a much shorter lifetime. It orbits the Sun in the outer main-belt at a distance of 2.4–4.2 AU once every 6.00 years (2,192 days; semi-major axis of 3.3 AU). Its orbit has an eccentricity of 0.29 and an inclination of 17 ° with respect t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3688 Navajo
3688 Navajo, provisional designation , is a Griqua asteroid and a 2:1 Jupiter librator on an eccentric, cometary-like orbit from the outermost regions of the asteroid belt, approximately in diameter. It was discovered on 30 March 1981, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona. The dark P-type asteroid was named for the Native American Navajo people. Orbit and classification ''Navajo'' is an asteroid in a cometary orbit (ACO), with no observable coma but with a Tisserand's parameter just below the defined the threshold of 3.0. ACO's may be extinct comets. It is a member of the small dynamical Griqua group, a marginally unstable group of asteroids observed in the Hecuba gap, a 2:1 resonant zone with the gas giant Jupiter. The group is named after its largest member, 1362 Griqua. ''Navajo'' is a non-family asteroid from the main belt's background population. It orbits the Sun in the outermost asteroid belt at a dista ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
