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Eric Walter Elst
Eric Walter Elst (30 November 1936 – 2 January 2022) was a Belgian astronomer at the Royal Observatory of Belgium in Uccle and a prolific discoverer of asteroids. The Minor Planet Center ranks him among the top 10 discoverers of minor planets with thousands of discoveries made at ESO's La Silla Observatory in northern Chile and at the Rozhen Observatory in Bulgaria during 1986–2009. The minor planet 3936 Elst, a stony Vestian asteroid from the inner regions of the asteroid belt, roughly 6 kilometers in diameter, was named in his honour. Discoveries Elst is credited by the Minor Planet Center with the discovery of 3866 numbered minor planets made between 1986 and 2009. Notable discoveries include 4486 Mithra, a near-Earth and Apollo asteroid, 7968 Elst-Pizarro, which is classified as both asteroid and comet, and more than 25 Jupiter trojans. His discoveries also include: * Binary asteroids such as 4492 Debussy and 15268 Wendelinefroger * Amor asteroids such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomer
An astronomer is a scientist in the field of astronomy who focuses on a specific question or field outside the scope of Earth. Astronomers observe astronomical objects, such as stars, planets, natural satellite, moons, comets and galaxy, galaxies – in either observational astronomy, observational (by analyzing the data) or theoretical astronomy. Examples of topics or fields astronomers study include planetary science, Sun, solar astronomy, the Star formation, origin or stellar evolution, evolution of stars, or the galaxy formation and evolution, formation of galaxies. A related but distinct subject is physical cosmology, which studies the Universe as a whole. Types Astronomers typically fall under either of two main types: observational astronomy, observational and theoretical astronomy, theoretical. Observational astronomers make direct observations of Astronomical object, celestial objects and analyze the data. In contrast, theoretical astronomers create and investigate Con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binary Asteroid
A binary asteroid is a system of two asteroids orbiting their common barycenter. The binary nature of 243 Ida was discovered when the Galileo spacecraft flew by the asteroid in 1993. Since then numerous binary asteroids and several triple asteroids have been detected. The mass ratio of the two components – called the "primary" and "secondary" of a binary system – is an important characteristic. Most binary asteroids have a large mass ratio, i.e. a relatively small satellite in orbit around the main component. Systems with one or more small moons – also called "companions" or simply "satellites" – include 87 Sylvia, 107 Camilla and 45 Eugenia (all triples), 121 Hermione, 130 Elektra (a quadruple), 22 Kalliope, 283 Emma, 379 Huenna, 243 Ida and 4337 Arecibo (in order of decreasing primary size). Some binary systems have a mass ratio near unity, i.e., two components of similar mass. They include 90 Antiope, , an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eric Elst
Eric Walter Elst (30 November 1936 – 2 January 2022) was a Belgian astronomer at the Royal Observatory of Belgium in Uccle and a prolific discoverer of asteroids. The Minor Planet Center ranks him among the top 10 discoverers of minor planets with thousands of discoveries made at European Southern Observatory, ESO's La Silla Observatory in northern Chile and at the Rozhen Observatory in Bulgaria during 1986–2009. The minor planet 3936 Elst, a stony Vesta family, Vestian asteroid from the inner regions of the asteroid belt, roughly 6 kilometers in diameter, was named in his honour. Discoveries Elst is credited by the Minor Planet Center with the discovery of 3866 numbered minor planets made between 1986 and 2009. Notable discoveries include 4486 Mithra, a near-Earth object, near-Earth and Apollo asteroid, 7968 Elst-Pizarro, which is classified as both asteroid and comet, and more than 25 Jupiter trojans. His discoveries also include: * Binary asteroids such as 4492 Debussy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1 Resonance
1 (one, unit, unity) is a number, numeral, and glyph. It is the first and smallest positive integer of the infinite sequence of natural numbers. This fundamental property has led to its unique uses in other fields, ranging from science to sports, where it commonly denotes the first, leading, or top thing in a group. 1 is the unit of counting or measurement, a determiner for singular nouns, and a gender-neutral pronoun. Historically, the representation of 1 evolved from ancient Sumerian and Babylonian symbols to the modern Arabic numeral. In mathematics, 1 is the multiplicative identity, meaning that any number multiplied by 1 equals the same number. 1 is by convention not considered a prime number. In digital technology, 1 represents the "on" state in binary code, the foundation of computing. Philosophically, 1 symbolizes the ultimate reality or source of existence in various traditions. In mathematics The number 1 is the first natural number after 0. Each natural number, ... [...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] |
13070 Seanconnery
13070 Seanconnery, provisional designation ', is a background asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 8 September 1991, by Belgian astronomer Eric Elst at Haute-Provence Observatory, St. Michael, in southeast France. The asteroid was named after actor Sean Connery. Orbit and classification ''Seanconnery'' is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.8–3.1 AU once every 3 years and 9 months (1,382 days). Its orbit has an eccentricity of 0.28 and an inclination of 6 ° with respect to the ecliptic. The asteroid's observation arc begins 20 years prior to its official discovery observation, with its identification made during the first Palomar–Leiden Trojan survey in 1971. Physical characteristics Rotation period In August 2006, a rotational lightcurve of ''Seanconnery'' was obtained from photometric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
13058 Alfredstevens
13058 Alfredstevens, provisional designation , is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered by Belgian astronomer Eric Elst at ESO's La Silla Observatory in Northern Chile, on 19 November 1990. The asteroid was named for Belgian painter Alfred Stevens. Orbit and classification Based on its orbital elements, ''Alfredstevens'' is a member of the Vesta family, a group of asteroids that originated from a massive impact on the Southern Hemnisphere of 4 Vesta, the family's namesake. It orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 7 months (1,324 days). Its orbit has an eccentricity of 0.12 and an inclination of 6 ° with respect to the ecliptic. The body's observation arc begins just five days prior to its official discovery observation, with a precovery taken at Palomar Observatory on 14 November 1990. Physical characteristics Lig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
12838 Adamsmith
12838 Adamsmith, provisional designation , is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 6 kilometers in diameter. The asteroid was discovered on 9 March 1997, by Belgian astronomer Eric Walter Elst at ESO's La Silla Observatory in northern Chile. It was named after Scottish philosopher and economist Adam Smith. Orbit and classification ''Adamsmith'' is a member of the Koronis family, a group of co-planar, stony asteroids in the outer main-belt, named after 158 Koronis. It orbits the Sun at a distance of 2.7–3.1 AU once every 4 years and 11 months (1,789 days). Its orbit has an eccentricity of 0.07 and an inclination of 1 ° with respect to the ecliptic. It was first identified as at the discovering observatory in 1987, extending the asteroid's observation arc by 10 years prior to its official discovery observation. Physical characteristics In January 2011, a rotational lightcurve of ''Adamsmith'' was obtained fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9936 Al-Biruni
9936 Al-Biruni, provisional designation , is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 8 August 1986, by Belgian and Bulgarian astronomers Eric Elst and Violeta Ivanova at the Rozhen Observatory, located in Bulgaria's Smolyan province near the border to Greece. It was named for Persian medieval scholar Al-Biruni. Orbit and classification ''Al-Biruni'' orbits the Sun in the outer main-belt at a distance of 2.5–3.7 AU once every 5 years and 5 months (1,976 days). Its orbit has an eccentricity of 0.19 and an inclination of 15 ° with respect to the ecliptic. It was first identified as at Crimea-Nauchnij in 1981, extending the body's observation arc by 5 years prior to its official discovery at Rozhen. Lightcurve A rotational lightcurve of ''Al-Biruni'' was obtained from photometric observations made at the U.S. Goodsell Observatory (), Minnesota, in August 2002. The lightcurv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Main-belt
The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids or minor planets. The identified objects are of many sizes, but much smaller than planets, and, on average, are about one million kilometers (or six hundred thousand miles) apart. This asteroid belt is also called the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System. The asteroid belt is the smallest and innermost circumstellar disc in the Solar System. Classes of small Solar System bodies in other regions are the near-Earth objects, the centaurs, the Kuiper belt objects, the scattered disc objects, the sednoids, and the Oort cloud objects. About 60% of the main belt mass is contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. The total mass of the asteroid be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
21088 Chelyabinsk
21088 Chelyabinsk (provisional designation ) is a stony asteroid and near-Earth object of the Amor group, approximately 4 kilometers in diameter. It was discovered on 30 January 1992, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The asteroid was named after the Russian city of Chelyabinsk and for its spectacular Chelyabinsk meteor event in 2013. It is not related to the Chelyabinsk impactor. Classification and orbit Chelyabinsk orbits the Sun at a distance of 1.3–2.1 AU once every 2 years and 3 months (814 days). Its orbit has an eccentricity of 0.24 and an inclination of 38 ° with respect to the ecliptic. A first precovery was taken during the Digitized Sky Survey at the Australia Siding Spring Observatory in January 1990, extending the asteroid's observation arc by 2 years prior to its official discovery at La Silla. Close approaches As a near-Earth object, Chelyabinsk has a low Earth minimum orbit intersection distance of , whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
