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Venus-crosser
A Venus-crosser is an asteroid whose orbit crosses that of Venus. There are 2,809List of asteroids with q<0.718440 AU and Q>0.728213 Retrieved 2015-01-05 Venus-crosser and 98 outer-grazers known. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1566 Icarus
1566 Icarus ( ; ''provisional designation'': ) is a large near-Earth object of the Apollo group and the lowest numbered potentially hazardous asteroid. It has is an extremely eccentric orbit (0.83) and measures approximately in diameter. In 1968, it became the first asteroid ever observed by radar. Its orbit brings it closer to the Sun than Mercury and further out than the orbit of Mars, which also makes it a Mercury-, Venus-, and Mars-crossing asteroid. This stony asteroid and relatively fast rotator with a period of 2.27 hours was discovered on 27 June 1949, by German astronomer Walter Baade at the Palomar Observatory in California. It was named after the mythological Icarus. Orbit and classification Icarus orbits the Sun at a distance of 0.19–1.97 AU once every 13 months (409 days; semi-major axis of 1.08 AU). Its orbit has an eccentricity of 0.83 and an inclination of 23 ° with respect to the ecliptic. The body's observation arc begins with its official ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1981 Midas
1981 Midas, provisional designation , is a vestoid asteroid, classified as a near-Earth object and potentially hazardous asteroid, approximately 2 kilometers in diameter. It was discovered on 6 March 1973 by American astronomer Charles Kowal at Palomar Observatory in San Diego County, California. It was named after King Midas from Greek mythology. Classification and orbit The moderately bright V-type asteroid is also an Apollo asteroid, as well as a Venus and Mars-crosser. The asteroid orbits the Sun at a distance of 0.6–2.9 AU once every 2 years and 4 months (864 days). Its orbit has an eccentricity of 0.65 and an inclination of 40 ° with respect to the ecliptic. ''Midas'' has a low minimum orbit intersection distance with Earth of , which corresponds to 1.5 lunar distance (Earth–Moon distance). However, it does not pose an impact risk for the foreseeable future. On 19 March 1947 it passed from Earth. The last notable close approach was on 21 March 2018 passing f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3554 Amun
3554 Amun is an M-type Aten asteroid (meaning it crosses Earth's orbit) and a Venus-crosser. It was discovered on 4 March 1986 by Carolyn and Eugene Shoemaker at Mount Palomar Observatory. Its estimated diameter is 3.341 kilometers, making it one of the smallest known M-type asteroids. Amun was the fifth Aten asteroid to be numbered. Amun was once considered metallic, based on its M-type spectrum. In ''Mining the Sky ''Mining the Sky: Untold Riches from the Asteroids, Comets, and Planets'', is a 1997 book by University of Arizona Planetary Sciences professor emeritus John S. Lewis that describes possible routes for accessing extraterrestrial resources, either ...'', planetary scientist John S. Lewis calculated the value of 3554 Amun at $20 trillion. (6178) 1986 DA is another M-type near-Earth asteroid with lower inclination that is actually metallic. Amun passes closest to Venus, and in 1964, 2034, and 2103 comes within 10 Gm of it. References External link ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1862 Apollo
1862 Apollo is a stony asteroid, approximately 1.5 kilometers in diameter, classified as a near-Earth object (NEO). It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 24 April 1932, but lost and not recovered until 1973. It is the namesake and the first recognized member of the Apollo asteroids, a subgroup of NEOs which are Earth-crossers, that is, they cross the orbit of the Earth when viewed perpendicularly to the ecliptic plane (crossing an orbit is a more general term than actually intersecting it). In addition, since Apollo's orbit is highly eccentric, it crosses the orbits of Venus and Mars and is therefore called a Venus-crosser and Mars-crosser as well. Although Apollo was the first Apollo asteroid to be discovered, its official IAU-number (1862) is higher than that of some other Apollo asteroids such as 1566 Icarus, due to the fact that it was a lost asteroid for more than 40 years and other bodies were numbered in the meantime. The anal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4769 Castalia
4769 Castalia (; '' prov. designation:'' ) is a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately in diameter and was the first asteroid to be modeled by radar imaging. It was discovered on 9 August 1989, by American astronomer Eleanor Helin (Caltech) on photographic plates taken at Palomar Observatory in California. It is named after Castalia, a nymph in Greek mythology. It is also a Mars- and Venus-crosser asteroid. General information On 25 August 1989 Castalia passed (within eleven lunar distances) of Earth, allowing it to be observed with radar from the Arecibo Observatory by Scott Hudson (Washington State University) and Steven J. Ostro (JPL). The data allowed Hudson et al. to produce a three-dimensional model of the object. During the 1989 passage Castalia peaked at an apparent magnitude of 12. Castalia has a peanut shape, suggesting two approximately 800-meter-diameter pieces held together by their weak mutual gravity. Since the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4197 Morpheus
4197 Morpheus, provisional designation , is a highly eccentric asteroid and near-Earth object of the Apollo group, approximately 3 kilometers in diameter. It was discovered on 11 October 1982, by American astronomers Eleanor Helin and Eugene Shoemaker at Palomar Observatory in California, United States. The asteroid was later named for Morpheus from Greek mythology. Orbit and classification ''Morpheus'' orbits the Sun at a distance of 0.5–4.1 AU once every 3 years and 6 months (1,271 days). Its orbit has an eccentricity of 0.77 and an inclination of 13 ° with respect to the ecliptic. Due to this elongated orbit, the asteroid is both, a Mars-crosser and a Venus-crosser. It has a minimum orbit intersection distance with Earth of , which corresponds to 38.5 lunar distances. A first precovery was taken at the discovering observatory in 1954, extending the body's observation arc by 28 years prior to its official discovery observation. Physical characteristics On the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3200 Phaethon
3200 Phaethon (previously sometimes spelled Phaeton), provisional designation , is an active Apollo asteroid with an orbit that brings it closer to the Sun than any other named asteroid (though there are numerous unnamed asteroids with smaller perihelia, such as ). For this reason, it was named after the Greek myth of Phaëthon, son of the sun god Helios. It is in diameter and is the parent body of the Geminids meteor shower of mid-December. With an observation arc of 35+ years, it has a very well determined orbit. The 2017 Earth approach distance of about 10 million km was known with an accuracy of ±700 m. Discovery Phaethon was the first asteroid to be discovered using images from a spacecraft. Simon F. Green and John K. Davies discovered it in images from October 11, 1983, while searching Infrared Astronomical Satellite (IRAS) data for moving objects. It was formally announced on October 14 in IAUC 3878 along with optical confirmation by Charles T. Kowal, who r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2063 Bacchus
2063 Bacchus, provisional designation , is a stony asteroid and near-Earth object of the Apollo group, approximately 1 kilometer in diameter. The contact binary was discovered on 24 April 1977, by American astronomer Charles Kowal at the Palomar Observatory in California, United States. It was named after Bacchus from Roman mythology. Orbit and classification ''Bacchus'' orbits the Sun at a distance of 0.7–1.5 AU once every 1 years and 1 month (409 days). Its orbit has an eccentricity of 0.35 and an inclination of 9 ° with respect to the ecliptic. The asteroid's observation arc begins with its official discovery observation at Palomar. Due to its eccentric orbit, it is also a Venus-crosser. Approaches ''Bacchus'' has an ''Earth minimum orbital intersection distance'' of , which corresponds to 26.4 lunar distances. On 31 March 1996, it passed from Earth. Physical characteristics In the SMASS classification, ''Bacchus'' is a Sq-type, that transitions from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3362 Khufu
3362 Khufu is a near-Earth asteroid. It was discovered by R. Scott Dunbar and Maria A. Barucci at the Palomar Observatory in San Diego County, California, on 30 August 1984. Its provisional designation was 1984 QA. It is named after Khufu, an ancient Egyptian pharaoh. Khufu was the 4th Aten asteroid to be numbered. 3362 Khufu is a potentially hazardous asteroid (PHA) because its minimum orbit intersection distance (MOID) is less than 0.05 AU and its diameter is greater than 150 meters. The Earth-MOID is . Its orbit is well-determined for the next several hundred years. Khufu crosses the orbits of Mars, Earth, and Venus and makes close approaches to Mercury as well. From 1900 to 2100 it drew nearer than 30 Gm (0.2 AU) to Mercury 26, Venus 27, Earth 20, and Mars 11 times. Orbit See also * Venus-crosser asteroid * Mars-crosser asteroid A Mars-crossing asteroid (MCA, also Mars-crosser, MC) is an asteroid whose orbit crosses that of Mars. Some Mars-crossers numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4450 Pan
4450 Pan ('' prov. designation:'' ) is a highly eccentric asteroid and contact binary, classified as a potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 25 September 1987, by American astronomers Eugene and Carolyn Shoemaker at Palomar Observatory in California, United States. It was named after Pan from Greek mythology. Naming This minor planet was named after Pan, the Greek god of nature, shepherds of flocks and wild animals. In art, he was represented as a horned half-man, half goat. Pan was worshiped by the citizens of Athens, after he had inspired panic in the hearts of their Persians enemies in the Battle of Marathon ''(also see 4356 Marathon)''. The modern word "panic" origins from this myth. The name ''Pan'' has also been given to Saturn XVIII, one of the moons of Saturn. The official naming citation was published by the Minor Planet Center on 30 January 1991 (). Orbit and cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4034 Vishnu
4034 Vishnu ('' prov. designation:'' ) is a rare-type asteroid classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately in diameter. It was discovered on 2 August 1986, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. It is named after the Hindu deity Vishnu. Naming This minor planet was named for the four-armed god of protection and preservation of good, Vishnu, one of the principal deities of Hinduism. The asteroid's name was proposed by Belgian amateur astronomer and professional meteorologist Jean Meeus. The approved naming citation was published by the Minor Planet Center on 15 July 2011 (). Classification and orbit ''Vishnu'' orbits the Sun at a distance of 0.6–1.5 AU once every 1 years and 1 month (398 days). Its orbit has an eccentricity of 0.44 and an inclination of 11 ° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3753 Cruithne
3753 Cruithne is a Q-type, Aten asteroid in orbit around the Sun in 1:1 orbital resonance with Earth, making it a co-orbital object. It is an asteroid that, relative to Earth, orbits the Sun in a bean-shaped orbit that effectively describes a horseshoe, and that can change into a quasi-satellite orbit. Cruithne does not orbit Earth and at times it is on the other side of the Sun, placing Cruithne well outside of Earth's Hill sphere. Its orbit takes it near the orbit of Mercury and outside the orbit of Mars. Cruithne orbits the Sun in about one Earth year, but it takes 770 years for the series to complete a horseshoe-shaped movement around Earth. The name ''Cruithne'' is from Irish and refers to the early Picts (Old Irish: ''Cruthin'') in the ''Annals of Ulster''Cruithne: Asteroid 3753 . Western Washington University Planetarium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
