1.
Minor planet
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A minor planet is an astronomical object in direct orbit around the Sun that is neither a planet nor exclusively classified as a comet. Minor planets can be dwarf planets, asteroids, trojans, centaurs, Kuiper belt objects, as of 2016, the orbits of 709,706 minor planets were archived at the Minor Planet Center,469,275 of which had received permanent numbers. The first minor planet to be discovered was Ceres in 1801, the term minor planet has been used since the 19th century to describe these objects. The term planetoid has also used, especially for larger objects such as those the International Astronomical Union has called dwarf planets since 2006. Historically, the asteroid, minor planet, and planetoid have been more or less synonymous. This terminology has become complicated by the discovery of numerous minor planets beyond the orbit of Jupiter. A Minor planet seen releasing gas may be classified as a comet. Before 2006, the IAU had officially used the term minor planet, during its 2006 meeting, the IAU reclassified minor planets and comets into dwarf planets and small Solar System bodies. Objects are called dwarf planets if their self-gravity is sufficient to achieve hydrostatic equilibrium, all other minor planets and comets are called small Solar System bodies. The IAU stated that the minor planet may still be used. However, for purposes of numbering and naming, the distinction between minor planet and comet is still used. Hundreds of thousands of planets have been discovered within the Solar System. The Minor Planet Center has documented over 167 million observations and 729,626 minor planets, of these,20,570 have official names. As of March 2017, the lowest-numbered unnamed minor planet is 1974 FV1, as of March 2017, the highest-numbered named minor planet is 458063 Gustavomuler. There are various broad minor-planet populations, Asteroids, traditionally, most have been bodies in the inner Solar System. Near-Earth asteroids, those whose orbits take them inside the orbit of Mars. Further subclassification of these, based on distance, is used, Apohele asteroids orbit inside of Earths perihelion distance. Aten asteroids, those that have semi-major axes of less than Earths, Apollo asteroids are those asteroids with a semimajor axis greater than Earths, while having a perihelion distance of 1.017 AU or less. Like Aten asteroids, Apollo asteroids are Earth-crossers, amor asteroids are those near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it
2.
Czechs
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Ethnic Czechs were called Bohemians in English until the early 20th century, referring to the late Iron Age tribe of Celtic Boii and the land Bohemia. The Czech diaspora is found in numbers in the United States, Canada, Israel, Austria, Germany, Slovakia, Switzerland, Italy. The Czech ethnic group is part of the West Slavic subgroup of the larger Slavic ethno-linguistical group, the West Slavs have origin in early Slavic tribes which settled in Central Europe after East Germanic tribes had left this area during the migration period. The West Slavic tribe of Bohemians settled in the area of Bohemia during the migration period and they formed an independent principality in the 9th century, the Duchy of Bohemia, under the Přemyslid dynasty. According to mythology, the father of the Czech people were Forefather Čech. The Czech are closely related to the neighbouring Slovaks, the Czech–Slovak languages form a dialect continuum rather than being two clearly distinct languages. Czech cultural influence in Slovak culture is noted as having much higher than the other way around. Czech people have a history of coexistence with Germanic people. The Czech National Revival took place in the 18th and 19th centuries aiming to revive Czech language, culture, the Czech were the initiators of Pan-Slavism. The Czech ethnonym was the name of a Slavic tribe in central Bohemia that subdued the tribes in the late 9th century. The origin of the name of the tribe itself is unknown, according to legend, it comes from their leader Čech, who brought them to Bohemia. Research regards Čech as a derivative of the root čel-, the Czech ethnonym was adopted by the Moravians in the 19th century. The name Bohemia is Germanic, English used that name until after the establishment of Czechoslovakia, the population of the Czech lands has been influenced by different human migrations that wide-crossed Europe over time. In their Y-DNA haplogroups, which are inherited along the male line,34. 2% of Czech males belong to R1a, which is particularly common in a large region extending from South Asia and Southern Siberia to Central Europe and Scandinavia. The population of the Czech Republic descends from diverse peoples of Slavic, Celtic and Germanic origin, presence of West Slavs in the 6th century during the Migration Period has been documented on the Czech territory. Slavs settled in Bohemia, Moravia and Austria sometime during the 6th or 7th centuries, according to a popular myth, the Slavs came with Forefather Čech who settled at the Říp Mountain. The Duchy of Bohemia emerged in the late 9th century, in 880, Prague Castle was constructed by Prince Bořivoj, founder of the Přemyslid dynasty and the city of Prague was established. Vratislav II was the first Czech king in 1085 and the duchy was raised to a kingdom under Ottokar I in 1198
3.
Astronomer
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An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside of the scope of Earth. They look at stars, planets, moons, comets and galaxies, as well as other celestial objects — either in observational astronomy. Examples of topics or fields astronomers work on include, planetary science, solar astronomy, there are also related but distinct subjects like physical cosmology which studies the Universe as a whole. Astronomers usually fit into two types, Observational astronomers make direct observations of planets, stars and galaxies, and analyze the data, theoretical astronomers create and investigate models of things that cannot be observed. They use this data to create models or simulations to theorize how different celestial bodies work, there are further subcategories inside these two main branches of astronomy such as planetary astronomy, galactic astronomy or physical cosmology. Today, that distinction has disappeared and the terms astronomer. Professional astronomers are highly educated individuals who typically have a Ph. D. in physics or astronomy and are employed by research institutions or universities. They spend the majority of their time working on research, although quite often have other duties such as teaching, building instruments. The number of astronomers in the United States is actually quite small. The American Astronomical Society, which is the organization of professional astronomers in North America, has approximately 7,000 members. This number includes scientists from other such as physics, geology. The International Astronomical Union comprises almost 10,145 members from 70 different countries who are involved in research at the Ph. D. level. Before CCDs, photographic plates were a method of observation. Modern astronomers spend relatively little time at telescopes usually just a few weeks per year, analysis of observed phenomena, along with making predictions as to the causes of what they observe, takes the majority of observational astronomers time. Astronomers who serve as faculty spend much of their time teaching undergraduate and graduate classes, most universities also have outreach programs including public telescope time and sometimes planetariums as a public service to encourage interest in the field. Those who become astronomers usually have a background in maths, sciences. Taking courses that teach how to research, write and present papers are also invaluable, in college/university most astronomers get a Ph. D. in astronomy or physics. Keeping in mind how few there are it is understood that graduate schools in this field are very competitive
4.
Comet
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A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to evolve gasses, a process called outgassing. This produces an atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of radiation and the solar wind acting upon the nucleus of the comet. Comet nuclei range from a few hundred metres to tens of kilometres across and are composed of collections of ice, dust. The coma may be up to 15 times the Earths diameter, if sufficiently bright, a comet may be seen from the Earth without the aid of a telescope and may subtend an arc of 30° across the sky. Comets have been observed and recorded since ancient times by many cultures, Comets usually have highly eccentric elliptical orbits, and they have a wide range of orbital periods, ranging from several years to potentially several millions of years. Short-period comets originate in the Kuiper belt or its associated scattered disc, long-period comets are thought to originate in the Oort cloud, a spherical cloud of icy bodies extending from outside the Kuiper belt to halfway to the nearest star. Long-period comets are set in motion towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars, hyperbolic comets may pass once through the inner Solar System before being flung to interstellar space. The appearance of a comet is called an apparition, Comets are distinguished from asteroids by the presence of an extended, gravitationally unbound atmosphere surrounding their central nucleus. This atmosphere has parts termed the coma and the tail, however, extinct comets that have passed close to the Sun many times have lost nearly all of their volatile ices and dust and may come to resemble small asteroids. Asteroids are thought to have a different origin from comets, having formed inside the orbit of Jupiter rather than in the outer Solar System, the discovery of main-belt comets and active centaur minor planets has blurred the distinction between asteroids and comets. As of November 2014 there are 5,253 known comets, however, this represents only a tiny fraction of the total potential comet population, as the reservoir of comet-like bodies in the outer Solar System is estimated to be one trillion. Roughly one comet per year is visible to the eye, though many of those are faint. Particularly bright examples are called Great Comets, the word comet derives from the Old English cometa from the Latin comēta or comētēs. That, in turn, is a latinisation of the Greek κομήτης, Κομήτης was derived from κομᾶν, which was itself derived from κόμη and was used to mean the tail of a comet. The astronomical symbol for comets is ☄, consisting of a disc with three hairlike extensions. The solid, core structure of a comet is known as the nucleus, cometary nuclei are composed of an amalgamation of rock, dust, water ice, and frozen gases such as carbon dioxide, carbon monoxide, methane, and ammonia. As such, they are described as dirty snowballs after Fred Whipples model
5.
Comet Kohoutek
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Comet Kohoutek, formally designated C/1973 E1,1973 XII, and 1973f, was first sighted on 7 March 1973 by Czech astronomer Luboš Kohoutek. It attained perihelion on 28 December that same year, Comet Kohoutek is a long-period comet, its previous apparition was about 150,000 years ago, and its next apparition will be in about 75,000 years. At its apparition in 1973 it had a hyperbolic trajectory due to perturbations from giant planets. Due to its path, scientists theorized that Kohoutek was an Oort-cloud object, as such, it was believed that this was the comets first visit to the inner Solar System, which would result in a spectacular display of outgassing. Before its close approach, Kohoutek was hyped by the media as the comet of the century, however, Kohouteks display was considered a let-down, possibly due to partial disintegration when the comet closely approached the Sun prior to its Earth flyby. Since this was probably the comets first visit to the inner Solar System, although it failed to brighten to levels expected, it was still a naked-eye object. Its greatest visual magnitude was −3, when it was at perihelion,0.14 AU from the Sun and its best viewing was in the night sky after perihelion, when it had dimmed to fourth magnitude. The comet also sported a tail up to 25° long, along with an anti-tail, C/1973 E1 should not be confused with the periodic comet 75D/Kohoutek, which can also be called Comet Kohoutek. In addition, there are another two long-period comets, C/1969 O1-A, and C/1973 D1 also discovered by Luboš Kohoutek, because Comet Kohoutek fell far short of expectations, its name became synonymous with spectacular duds. However, it was bright as comets go and put on a respectable show in the evenings shortly after perihelion. In 1973, David Berg, founder of the Children of God, Children of God members distributed Bergs message of doom across the country. The majority of U. S. -based members then fled in anticipation to existing communes, or formed new ones, linus eventually identifies the light as Kohoutek. The jazz composer Sun Ra performed the Concert for the Comet Kohoutek in December 1973, the first single of German avant-garde music group Kraftwerk, released in December 1973, was called Kohoutek-Kometenmelodie. On the album Autobahn, which appeared a few months later, the first album of Yahowha 13 from 1973 is called Kohoutek. Argents 1974 album Nexus begins with three linked tracks inspired by Kohoutek, The Coming of Kohoutek, Once Around the Sun, the rock band Journey wrote and recorded the instrumental Kohoutek, which appeared on their self-titled debut album Journey in 1975. Bill Carroll released an album in 1994 titled Kohoutek, the English techno group 808 State wrote and recorded the instrumental Kohoutek, which appeared on their 1996 album Don Solaris. Since January 1974, Kohoutek Music and Arts festival has been a spring event at Pitzer College honoring the comet. In the Mexican series El Chavo del Ocho, the characters are afraid of the fall of the comet
6.
Brno
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Brno is the second largest city in the Czech Republic by population and area, the largest Moravian city, and the historical capital city of the Margraviate of Moravia. Brno is the center of the South Moravian Region in which it forms a separate district. The city is also a significant administrative centre and it is the seat of a number of state authorities, including the Ombudsman, and the Office for the Protection of Competition. Brno is also an important centre of education, with 33 faculties belonging to 13 institutes of higher learning. Brno Exhibition Centre ranks among the largest exhibition centres in Europe, the complex opened in 1928 and established the tradition of large exhibitions and trade fairs held in Brno. Brno hosts motorbike and other races on the Masaryk Circuit, an established in 1930. Another cultural tradition is a fireworks competition, Ignis Brunensis. The other large preserved castle near the city is Veveří Castle by the Brno Dam Lake and this castle is the site of a number of legends, as are many other places in Brno. Another architectural monument of Brno is the functionalist Villa Tugendhat which has been included on the UNESCO list of World Heritage Sites, one of the natural sights nearby is the Moravian Karst. The etymology of the name Brno is disputed and it perhaps comes from Old Czech brnie muddy, swampy. Alternative derivations are from a Slavic verb brniti or a Celtic language spoken in the area before it was overrun by Germanic peoples, throughout its history, Brnos locals also referred to the town in other languages, including Brünn in German, ברין in Yiddish and Bruna in Latin. The city was referred to as Brunn in English. The Asteroid 2889 Brno was named after the city, as well as the Bren light machine gun, one of the most famous weapons of World War II. In the early 11th century Brno was established as a castle of a prince from the House of Přemyslid. Brno was first mentioned in Cosmas Chronica Boëmorum dated to year 1091, seats of these rulers and thus capitals of these territories were castles and towns of Brno, Olomouc, and Znojmo. In the late 12th century, Moravia began to reunify, forming the Margraviate of Moravia, since then, until the mid of the 17th century, it was not clear which town should be the capital of Moravia. Political power was therefore divided between Brno and Olomouc, but Znojmo also played an important role. The Moravian Diet, the Moravian Land Tables, and the Moravian Land Court were all seated in both cities at once, however, Brno was the official seat of the Moravian Margraves, and later its geographical position closer to Vienna also became important
7.
Prague
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Prague is the capital and largest city of the Czech Republic. It is the 14th largest city in the European Union and it is also the historical capital of Bohemia. Situated in the north-west of the country on the Vltava river, the city has a temperate climate, with warm summers and chilly winters. Prague has been a political, cultural, and economic centre of central Europe with waxing and waning fortunes during its history and it was an important city to the Habsburg Monarchy and its Austro-Hungarian Empire. Prague is home to a number of cultural attractions, many of which survived the violence. Main attractions include the Prague Castle, the Charles Bridge, Old Town Square with the Prague astronomical clock, since 1992, the extensive historic centre of Prague has been included in the UNESCO list of World Heritage Sites. The city has more than ten major museums, along with theatres, galleries, cinemas. An extensive modern public transportation system connects the city, also, it is home to a wide range of public and private schools, including Charles University in Prague, the oldest university in Central Europe. Prague is classified as an Alpha- global city according to GaWC studies, Prague ranked sixth in the Tripadvisor world list of best destinations in 2016. Its rich history makes it a popular tourist destination, and the city more than 6.4 million international visitors annually. Prague is the fifth most visited European city after London, Paris, Istanbul, the region was settled as early as the Paleolithic age. In the last century BC, the Celts were slowly driven away by Germanic tribes, around the area where present-day Prague stands, the 2nd century map of Ptolemaios mentioned a Germanic city called Casurgis. In the following century, the Czech tribes built several fortified settlements in the area, most notably in Levý Hradec, Butovice and in the Šárka valley. The construction of what came to be known as the Prague Castle began near the end of the 9th century, the first masonry under Prague Castle dates from the year 885 at the latest. The other prominent Prague fort, the Přemyslid fort Vyšehrad, was founded in the 10th century, Prague Castle is dominated by the cathedral, which was founded in 1344, but completed in the 20th century. The legendary origins of Prague attribute its foundation to the 8th century Czech duchess and prophetess Libuše and her husband, Přemysl, legend says that Libuše came out on a rocky cliff high above the Vltava and prophesied, I see a great city whose glory will touch the stars. She ordered a castle and a town called Praha to be built on the site, a 17th century Jewish chronicler David Solomon Ganz, citing Cyriacus Spangenberg, claimed that the city was founded as Boihaem in c.1306 BC by an ancient king, Boyya. The region became the seat of the dukes, and later kings of Bohemia, under Roman Emperor Otto II the area became a bishopric in 973
8.
Hamburg Observatory
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Hamburg Observatory is an astronomical observatory located in the Bergedorf borough of the city of Hamburg in northern Germany. It is owned and operated by the University of Hamburg, Germany since 1968, although it was founded in 1825 by the City of Hamburg and moved to its present location in 1912. It has operated telescopes at Bergedorf, at two locations in Hamburg, at other observatories around the world, and it has also supported space missions. The precursor of Hamburg Observatory was an observatory by Johann Georg Repsold built in 1802. It started in 1803 with a meridian circle built by Repsold in 1808, however, it was destroyed in 1811 by a war. Repsold, Reinke, and J. C. von Hess submitted a proposal to Hamburg for city observatory that same year, funding for a new Observatory was approved in August 1821, on the condition J. G. Repsold built the instruments. The new observatory was completed in 1825 next to the Millerntor, however, in 1830 Repsold died while fighting a fire and the City of Hamburg voted to take over and continue running the observatory in 1833. First director became Charles Rümker who har accompanied Thomas Brisbane to build the first Australian observatory at Parramatta, christian August Friedrich Peters became assistant director in 1834. In 1856 Rümkers son George became director of the observatory, in 1876 funding was received for The Equatorial, a 27 cm refractor, it was later moved to Bergedorf. After the move to Bergedorf, the site was partially demolished, because of the increasing light pollution, in 1906 it was decided to move the observatory to Bergedorf. In 1909 the first instruments were moved there, and in 1912 the new observatory was officially dedicated, the European Southern Observatory was founded at Bergedorf in 1962. The Hamburg 1m Reflector was the fourth largest reflector when it began operations in 1911. Catalogs include the AGK3-Sternkatalog In 1968 the observatory part of Hamburg University. In 1979 a small museum to Bernard Schmidt was inaugurated, in 2012,100 years at Bergedorf was celebrated. Telescopes The Great Refractor, a refractor telescope with an objective diameter. By Repsold, and with optics from Steinheil, the Equatorial, a refractor with aperture of 26 cm and focal length. Built in the 1870s and moved to Bergedorf, salvador Mirror, a Cassegrain with 8 m focal length and 40 cm mirror. The Meridian Circle, a meridian circle built in 1907, Lippert Telescope, three astrographs refractors on one mount
9.
Planetary nebula
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A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from old red giant stars late in their lives. Herschels name for these objects was popularly adopted and has not been changed and they are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years. After most of the red giants atmosphere is dissipated, the radiation of the hot luminous core, called a planetary nebula nucleus. Absorbed ultraviolet light energises the shell of gas around the central star. Planetary nebulae likely play a role in the chemical evolution of the Milky Way by expelling elements to the interstellar medium from stars where those elements were created. Planetary nebulae are also observed in distant galaxies, yielding useful information about their chemical abundances. Starting from the 1990s, Hubble Space Telescope images have revealed many planetary nebulae to have extremely complex, about one-fifth are roughly spherical, but the majority are not spherically symmetric. The mechanisms that produce such a variety of shapes and features are not yet well understood. The first planetary nebula discovered was the Dumbbell Nebula in the constellation of Vulpecula and it was observed by Charles Messier in 1764 and listed as M27 in his catalogue of nebulous objects. To early observers with telescopes, M27 and subsequently discovered planetary nebulae resembled the giant planets like Uranus. William Herschel, discoverer of Uranus, eventually coined the term planetary nebula, the nature of planetary nebulae was unknown until the first spectroscopic observations were made in the mid-19th century. Using a prism to disperse their light, William Huggins was one of the earliest astronomers to study the spectra of astronomical objects. On August 29,1864, Huggins was the first to analyze the spectrum of a planetary nebula when he observed Cats Eye Nebula and his observations of stars showed that their spectra consisted of a continuum of radiation with many dark lines superimposed. He later found that many objects such as the Andromeda Nebula had spectra that were quite similar. Those nebulae were later shown to be collections of stars now called galaxies, however, when Huggins looked at the Cats Eye Nebula, he found a very different spectrum. Rather than a strong continuum with absorption lines superimposed, the Cats Eye Nebula, the brightest of these was at a wavelength of 500.7 nanometres, which did not correspond with a line of any known element. At first, it was hypothesized that the line might be due to an unknown element, a similar idea had led to the discovery of helium through analysis of the Suns spectrum in 1868. While helium was isolated on Earth soon after its discovery in the spectrum of the Sun, nebulium was not
10.
75D/Kohoutek
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75D/Kohoutek is a short-period comet discovered in February 1975, by Lubos Kohoutek. Not to be confused with the much better-known C/1973 E1, 75D is a visitor to the inner Solar System. It was placed on the orbit when it passed 0.143 AU from Jupiter on 28 July 1972. Apparitions have been dim, with the brightest being in 1988 at about apparent magnitude 13 and it was last predicted in 2014, but was not seen, nor was it seen in its previous approaches in 2007, in 2000, or in 1994. The comet has been estimated to be 4.6 kilometres in diameter and this comet was last observed by Mauna Kea on 19 May 1988. The Minor Planet Center has given the comet a D/ designation as the comet is believed to be lost, the comet is calculated to come to opposition in October 2020 in the constellation of Pisces. List of numbered comets Orbital simulation from JPL / Ephemeris 75D/Kohoutek – Seiichi Yoshida @ aerith. net
11.
Asteroid
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Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids and these terms have historically been applied to any astronomical object orbiting the Sun that did not show the disc of a planet and was not observed to have the characteristics of an active comet. As minor planets in the outer Solar System were discovered and found to have volatile-based surfaces that resemble those of comets, in this article, the term asteroid refers to the minor planets of the inner Solar System including those co-orbital with Jupiter. There are millions of asteroids, many thought to be the remnants of planetesimals. The large majority of known asteroids orbit in the belt between the orbits of Mars and Jupiter, or are co-orbital with Jupiter. However, other orbital families exist with significant populations, including the near-Earth objects, individual asteroids are classified by their characteristic spectra, with the majority falling into three main groups, C-type, M-type, and S-type. These were named after and are identified with carbon-rich, metallic. The size of asteroids varies greatly, some reaching as much as 1000 km across, asteroids are differentiated from comets and meteoroids. In the case of comets, the difference is one of composition, while asteroids are composed of mineral and rock, comets are composed of dust. In addition, asteroids formed closer to the sun, preventing the development of the aforementioned cometary ice, the difference between asteroids and meteoroids is mainly one of size, meteoroids have a diameter of less than one meter, whereas asteroids have a diameter of greater than one meter. Finally, meteoroids can be composed of either cometary or asteroidal materials, only one asteroid,4 Vesta, which has a relatively reflective surface, is normally visible to the naked eye, and this only in very dark skies when it is favorably positioned. Rarely, small asteroids passing close to Earth may be visible to the eye for a short time. As of March 2016, the Minor Planet Center had data on more than 1.3 million objects in the inner and outer Solar System, the United Nations declared June 30 as International Asteroid Day to educate the public about asteroids. The date of International Asteroid Day commemorates the anniversary of the Tunguska asteroid impact over Siberia, the first asteroid to be discovered, Ceres, was found in 1801 by Giuseppe Piazzi, and was originally considered to be a new planet. In the early half of the nineteenth century, the terms asteroid. Asteroid discovery methods have improved over the past two centuries. This task required that hand-drawn sky charts be prepared for all stars in the band down to an agreed-upon limit of faintness. On subsequent nights, the sky would be charted again and any moving object would, hopefully, the expected motion of the missing planet was about 30 seconds of arc per hour, readily discernible by observers
12.
Apollo asteroid
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The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth crossing asteroids that have an orbital semi-major axis greater than that of the Earth, as of November 2016, the steadily growing number of known Apollo asteroids has reached a total of 8,180 members. It is by far the largest group of objects, compared to the Aten, Amor. Currently, there are 1,133 numbered Apollos, asteroids are not numbered until they have been observed at two or more oppositions. There are also 1,472 Apollo asteroids that are enough. The closer their semi-major axis is to Earths, the eccentricity is needed for the orbits to cross. The largest known Apollo asteroid is 1866 Sisyphus, with a diameter of about 8.5 km, examples of known Apollo asteroids include, Apollo asteroids Apollo asteroid records List of Apollo minor planets
13.
1865 Cerberus
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1865 Cerberus, provisional designation 1971 UA, is a stony asteroid and near-Earth object of the Apollo group, approximately 1.6 kilometers in diameter. It was discovered on 26 October 1971, by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory in Germany, the S-type asteroid orbits the Sun at a distance of 0. 6–1.6 AU once every 1 years and 1 month. Its orbit has an eccentricity of 0.47 and an inclination of 16° with respect to the ecliptic and it also makes close approaches to Mars and Venus. The minor planet is named after the figure from Greek mythology, Cerberus, a dog that guarded the entrance to Hades. His capture marked the last of the labors of Hercules. It is also the name of a constellation, Cerberus. Naming citation was published before November 1977
14.
Asteroid belt
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The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets, the asteroid belt is also termed the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System such as near-Earth asteroids and trojan asteroids. About half the mass of the belt is contained in the four largest asteroids, Ceres, Vesta, Pallas, the total mass of the asteroid belt is approximately 4% that of the Moon, or 22% that of Pluto, and roughly twice that of Plutos moon Charon. Ceres, the belts only dwarf planet, is about 950 km in diameter, whereas Vesta, Pallas. The remaining bodies range down to the size of a dust particle, the asteroid material is so thinly distributed that numerous unmanned spacecraft have traversed it without incident. Nonetheless, collisions between large asteroids do occur, and these can form a family whose members have similar orbital characteristics. Individual asteroids within the belt are categorized by their spectra. The asteroid belt formed from the solar nebula as a group of planetesimals. Planetesimals are the precursors of the protoplanets. Between Mars and Jupiter, however, gravitational perturbations from Jupiter imbued the protoplanets with too much energy for them to accrete into a planet. Collisions became too violent, and instead of fusing together, the planetesimals, as a result,99. 9% of the asteroid belts original mass was lost in the first 100 million years of the Solar Systems history. Some fragments eventually found their way into the inner Solar System, Asteroid orbits continue to be appreciably perturbed whenever their period of revolution about the Sun forms an orbital resonance with Jupiter. At these orbital distances, a Kirkwood gap occurs as they are swept into other orbits. Classes of small Solar System bodies in other regions are the objects, the centaurs, the Kuiper belt objects, the scattered disc objects, the sednoids. On 22 January 2014, ESA scientists reported the detection, for the first definitive time, of water vapor on Ceres, the detection was made by using the far-infrared abilities of the Herschel Space Observatory. The finding was unexpected because comets, not asteroids, are considered to sprout jets. According to one of the scientists, The lines are becoming more and more blurred between comets and asteroids. This pattern, now known as the Titius–Bode law, predicted the semi-major axes of the six planets of the provided one allowed for a gap between the orbits of Mars and Jupiter
15.
1933 Tinchen
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1933 Tinchen, provisional designation 1972 AC, is a Vestian asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory and it orbits the Sun at a distance of 2. 1–2.6 AU once every 3 years and 7 months. Its orbit has an eccentricity of 0.12 and an inclination of 7° with respect to the ecliptic, the vestoid or V-type asteroid is also a member of the Vesta family. Tinchen has a period of 3.671 hours. Its assumed high geometric albedo of 0.4 is based on data in the range of 0. 30–0.61. The discoverer named the asteroid after his wife, Christine Kohoutek, naming citation was published before November 1977
