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Herbert Raab
Herbert Raab (born 24 January 1969 in Linz, Austria) is an Austrian software engineer, amateur astronomer and discoverer of astronomical objects. Biography Raab finished his studies of computer science at the Johannes Kepler University of Linz in 1995 as a graduate engineer. In 2012, he received the Master of Science in ''Management for Engineers'' at the LIMAK business school in Linz, where he also graduated as Master of Business Administration in 2013. He works as a software engineer in the field of commercial software. In 1983, he joined the Astronomical Society of Linz (german: Linzer Astronomische Gemeinschaft, link=no), and has been president of the society from 1996 until 2017. Since 1990, he has been developing the widely used software ''Astrometrica'', which is used for astrometric and photometric analysis of images of asteroids and comets. Raab's most important observations include precise astrometry of the comet Shoemaker–Levy 9, which he observed together with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroid
An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere. Of the roughly one million known asteroids the greatest number are located between the orbits of Mars and Jupiter, approximately 2 to 4 AU from the Sun, in the main asteroid belt. Asteroids are generally classified to be of three types: C-type, M-type, and S-type. These were named after and are generally identified with carbonaceous, metallic, and silicaceous compositions, respectively. The size of asteroids varies greatly; the largest, Ceres, is almost across and qualifies as a dwarf planet. The total mass of all the asteroids combined is only 3% that of Earth's Moon. The majority of main belt asteroids follow slightly elliptical, stable orbits, revolving in the same direction as the Earth and taking from three to six years to comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet Shoemaker–Levy 9
Comet Shoemaker–Levy 9 ( formally designated D/1993 F2) broke apart in July 1992 and collided with Jupiter in July 1994, providing the first direct observation of an extraterrestrial collision of Solar System objects. This generated a large amount of coverage in the popular media, and the comet was closely observed by astronomers worldwide. The collision provided new information about Jupiter and highlighted its possible role in reducing space debris in the inner Solar System. The comet was discovered by astronomers Carolyn and Eugene M. Shoemaker and David Levy in 1993. Shoemaker–Levy 9 (SL9) had been captured by Jupiter and was orbiting the planet at the time. It was located on the night of March 24 in a photograph taken with the Schmidt telescope at the Palomar Observatory in California. It was the first active comet observed to be orbiting a planet, and had probably been captured by Jupiter around 20 to 30 years earlier. Calculations showed that its unusual fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gareth V
Sir Gareth (; Old French: ''Guerehet'', ''Guerrehet'') is a Knight of the Round Table in Arthurian legend. He is the youngest son of King Lot and Queen Morgause, King Arthur's half-sister, thus making him Arthur's nephew, as well as brother to Gawain, Agravain and Gaheris, and either a brother or half-brother of Mordred. Gareth is particularly notable in ''Le Morte d'Arthur'' in which he is also known by his nickname Beaumains. Arthurian legend French literature The earliest role of Gareth, appearing as Guerrehet, is found in the First Continuation of Chrétien de Troyes's ''Perceval ou le Conte du Graal''. As the protagonist of the story's final episode, he slays the giant known as "Little Knight", thus avenging the death of fairy king Brangemuer, son of Guingamuer and the fay Brangepart. Several of his adventures are narrated in the Vulgate Cycle (''Lancelot-Grail''). In the Vulgate ''Merlin'', Gareth and his brothers defect from their father King Lot and take service wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brian G
H. Brian Griffinas shown in Brian Griffin's House of Payne is a fictional character from the American animated television series ''Family Guy''. An anthropomorphic white labrador retriever voiced by Seth MacFarlane, he is one of the show's main characters as a member of the Griffin family. He primarily works in the series as a less-than-adept writer struggling to find himself, attempting essays, novels, screenplays, and newspaper articles. He first appeared on television, along with the rest of the family, in a 15-minute short on December 20, 1998. Brian was created and designed by MacFarlane himself. MacFarlane was asked to pitch a pilot to the Fox Broadcasting Company, based on ''The Life of Larry'' and ''Larry & Steve'', two shorts made by MacFarlane featuring a middle-aged character named Larry and an intellectual dog, Steve. These two are now considered as Peter and Brian. After the pilot was given the green light, the Griffin family appeared in the episode " Death Has a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3184 Raab
3184 Raab, provisional designation , is a dark background asteroid and a potentially slow rotator from the central regions of the asteroid belt, approximately in diameter. It was discovered on 22 August 1949, by South African astronomer Ernest Leonard Johnson at the Union Observatory in Johannesburg. The likely C-type asteroid could have a long rotation period of 275 hours. It was named after Austrian amateur astronomer and software engineer Herbert Raab. Orbit and classification ''Raab'' is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.0–3.4 AU once every 4 years and 4 months (1,593 days; semi-major axis of 2.67 AU). Its orbit has an eccentricity of 0.26 and an inclination of 8 ° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg in August 1949. Physical characteristics This asteroid's spectral type is unknow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double Star
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other as viewed from Earth, especially with the aid of optical telescopes. This occurs because the pair either forms a binary star (i.e. a binary system of stars in mutual orbit, gravitationally bound to each other) or is an ''optical double'', a chance line-of-sight alignment of two stars at different distances from the observer. Binary stars are important to stellar astronomers as knowledge of their motions allows direct calculation of stellar mass and other stellar parameters. The only (possible) case of "binary star" whose two components are separately visible to the naked eye is the case of Mizar and Alcor (though actually a multiple-star system), but it is not known for sure whether Mizar and Alcor are gravitationally bound. Since the beginning of the 1780s, both professional and amateur double star observers have telescopically measured the distances and angles between d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1177 Gonnessia
1177 Gonnessia, provisional designation , is a dark background asteroid from the outer regions of the asteroid belt, approximately 99 kilometers in diameter. It was discovered on 24 November 1930, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa, and named after astronomer François Gonnessiat. Orbit and classification ''Gonnessia'' is not a member of any known asteroid family. It orbits the Sun in the outer main-belt at a distance of 3.2–3.5 AU once every 6 years and 2 months (2,238 days). Its orbit has an eccentricity of 0.03 and an inclination of 15 ° with respect to the ecliptic. The asteroid was first observed as at Simeiz Observatory in September 1923. The body's observation arc begins at Heidelberg Observatory, three weeks after its official discovery observation at Algiers Bouzaréah. Physical characteristics In the Tholen classification, ''Gonnessia'' is classified as an asteroid with an unusual spectrum (XFU). It wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hipparcos
''Hipparcos'' was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the first high-precision measurements of the intrinsic brightnesses (compared to the less precise apparent brightness), proper motions, and parallaxes of stars, enabling better calculations of their distance and tangential velocity. When combined with radial velocity measurements from spectroscopy, astrophysicists were able to finally measure all six quantities needed to determine the motion of stars. The resulting ''Hipparcos Catalogue'', a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision ''Tycho Catalogue'' of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. ''Hipparcos' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Occultation
An occultation is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground blocks from view (occults) an object in the background. In this general sense, occultation applies to the visual scene observed from low-flying aircraft (or computer-generated imagery) when foreground objects obscure distant objects dynamically, as the scene changes over time. If the closer body does not entirely conceal the farther one, the event is called a ''transit''. Both transit and occultation may be referred to generally as ''occlusion''; and if a shadow is cast onto the observer, it is called an eclipse. The symbol for an occultation, and especially a solar eclipse, is file:Occultation symbol.svg (U+1F775 🝵). Occultations by the Moon The term occultation is most frequently used to describe lunar occultations, those relativ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:Category:Discoveries By The Davidschlag Observatory
{{Cat main, Davidschlag Observatory Category for discoveries by the Davidschlag Observatory (IAU code This is a list of observatory codes (IAU codes or MPC codes) published by the Minor Planet Center. For a detailed description, ''see observations of small Solar System bodies Observations of minor planets as well as comets and natural satellite ... 540) owned by Austrian amateur astronomer Erich Meyer. See parent category for proper sortkey usage instructions. Davidschlag Observatory ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kirchschlag Bei Linz
Kirchschlag bei Linz is a municipality in the district of Urfahr-Umgebung in the Austrian state of Upper Austria Upper Austria (german: Oberösterreich ; bar, Obaöstareich) is one of the nine states or of Austria. Its capital is Linz. Upper Austria borders Germany and the Czech Republic, as well as the other Austrian states of Lower Austria, Styria, a .... Population References Cities and towns in Urfahr-Umgebung District {{UpperAustria-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
