This is a shape model of Flora computed using light curve inversion techniques. Earlier work by Bill Bottke, a planetary scientist at the Southwest Research Institute, has fingered one such asteroid family as the birthplace of the dinosaur-killer and accused another, the Flora family, of causing impacts on Earth perhaps a billion years ago. The purpose of the Foundation is to promote the well-being of people everywhere by supporting selected activities of charitable organizations and institutions as determined by members of the Board and Family … These include: 809 Lundia — Orbits within the Flora family region; 956 Elisa; 1459 Magnya — Orbits in the outer asteroid belt, too far from Vesta to be genetically related. In 1918, the Japanese astronomer K. Hirayama first recognized some non random concentrations of asteroid elements. Asteroid 8 Flora is currently in the constellation of Cetus.The current Right Ascension of Asteroid 8 Flora is 02h 39m 46s and the Declination is +10° 16’ 14” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom []).The current magnitude of Asteroid 8 Flora is 9.79 (JPL). 2002, Icarus, 157, 155-172; Bottke et al. en The results showed that for both asteroid families, generally the most precise version of the algorithm was the topocentric version. Flora (minor planet designation: 8 Flora) is a large, bright main-belt asteroid.It is the innermost large asteroid: no asteroid closer to the Sun has a diameter above 25 kilometres or two-elevenths that of Flora itself, and not until the tiny 149 Medusa was discovered was a single asteroid orbiting at a closer mean distance known. Our results suggest that the Flora family dynamically disperses on a few 10 8 -year time scale and that its age may be significantly less than 10 9 years. The family of asteroids Flora Licence Public domain Public domain false false: I, the copyright holder of this work, release this work into the public domain. Planetoïdenfamilie - Asteroid family. 2002, Icarus, 157, 155-172; Bottke et al. All the members of the Flora family probably came from the breakup of a single parent body; however, other asteroids in this region with similar orbital characteristics appear to have different origins. It's about 147 kilometers across — comparable in size to the state of Connecticut — and the largest asteroid in the inner main belt. Flora may be the residual core of an intensely heated, thermally evolved, and magmatically differentiated planetesimal which was subsequently disrupted. 8 Flora is a big, bright, main belt asteroid.It is the closest big asteroid: no asteroid closer to the Sun has a diameter above 25 kilometres or two-elevenths that of Flora itself, and not until the tiny 149 Medusa was found was a single asteroid orbiting at a closer mean distance known. The Flora family is one of the asteroid families that were discovered early (Hirayama, 1918). Request PDF | On Jan 1, 2008, A. Kryszczynska and others published Physical Investigations of the Flora Family Asteroids | Find, read and cite all the research you need on ResearchGate Contents[show] General properties Large, prominent families contain several hundred recognized asteroids (and many more smaller objects which … The members of the families are thought to be fragments of past asteroid collisions. It is located in the inner region of the asteroid belt. This is because unrelated asteroids are hard to distinguish from family members because the family is of the same spectral type (S) that dominates the closer main belt overall. The spectra of the V-type asteroids, or vestoids, are similar to that of 4 Vesta, by far the largest asteroid in this class (hence the name). Binsel, Richard P.; Gehrels, Tom and Matthews, Mildred Shapley (editors); "JPL Small-Body Database Browser: 8 Flora", "AstDyS-2 Flora Synthetic Proper Orbital Elements", "Announcement of discovery of Flora", MNRAS, https://en.wikipedia.org/w/index.php?title=8_Flora&oldid=1000632173, Articles with dead external links from February 2019, Articles with permanently dead external links, Articles with dead external links from June 2017, Articles with unsourced statements from October 2020, Articles with unsourced statements from November 2008, Creative Commons Attribution-ShareAlike License, This page was last edited on 16 January 2021, at 00:14. 951 Gaspra / ˈ ɡ æ s p r ə / is an S-type asteroid that orbits very close to the inner edge of the asteroid belt.Gaspra was discovered by Russian astronomer G. N. Neujmin in 1916. Asteroid families are believed to originate by catastrophic disruptions of large asteroids. 402 8 Flora Though di use, the family associated with asteroid (8) Flora dominates the inner main belt in terms of the extent of its members in orbital parameter space, result- … Flora can reach a magnitude of +7.9 at a favorable opposition near perihelion Several new studies on the Feb. 15 meteor explosion over Chelyabinsk, Russia, has revealed a much higher asteroid risk to Earth than previously thought, scientists say. Available evidence concerning the Flora family, together with recent models for the collisional evolution of the asteroids, suggests that this family may have originated from a binary or multiple asteroid. Such cratering families typically consist of a single large body and a swarm of asteroids that are many times smaller. Jenniskens speculates the Chelyabinsk rock belonged to a larger "rubble pile" asteroid that broke apart 1.2 million years ago, possibly after a close encounter with Earth's gravitational pull. All the members of the Flora family probably came from the breakup of a single parent body; however, other asteroids in this region with similar orbital characteristics appear to have different origins. Flora is the parent body of the Flora family of asteroids, and by far the largest member, comprising about 80% of the total mass of this family. Flora family The Flora family of asteroids is a big group of S-type asteroids in the closer part of the main belt , whose origin and properties are not well understood right now. Nevertheless, Flora was almost certainly disrupted by the impact(s) that formed the family, and is probably a gravitational aggregate of most of the pieces. Curiously, our understanding of its properties has remained fairly murky even as our knowledge of the asteroid belt has increased. It is a remnant from a collisional disruption of a large body or bodies that occurred hundreds of My to a few Gy ago (the age of the family was approximated by several authors, for example It is the seventh brightest asteroid with a mean opposition magnitude of +8.7. Our Flora family members reproduce the observed semimajor axis, eccentricity, and inclination distributions of the real family after to 1.4 Gyr. We created an initial Flora family and followed test asteroids 1 and 3 km in diameter using a numerical code that accounted for both planetary perturbations and nongravitational effects. The Flora family of asteroids is a big group of S-type asteroids in the closer part of the main belt, whose origin and properties are not well understood right now.About 4-5% of all main belt asteroids belong to this family. young collisional family within the Koronis family was born Slivan & Molnar 2012). The distribution of proper elements and physical properties of Flora-family asteroids are compared with those of families believed to have formed from the catastrophic disruption of parent bodies. PRELIMINARIES ON THE FLORA FAMILY The inner zone of the asteroid belt is characterized by the presence of three populous clans (named Flora, Nysa, and Vesta in Zappal`aet al.1994). It is the innermost large asteroid: no asteroid closer to the Sun has a diameter above 25 kilometres or two-elevenths that of Flora itself, and not until the tiny 149 Medusa was discovered was a single asteroid orbiting at a closer mean distance known. From Redmond, it will be visible between 20:02 and 04:07.It will become accessible around 20:02, when it rises to an altitude of 21° above your eastern … It is a remnant from a collisional disruption of a large body or bodies that occurred hundreds of My to a few Gy ago (the age of the family was approximated by several authors, for example WikiMatrix. The Flora asteroid family, which resides in the innermost region of the main asteroid belt, has been known for nearly a century. [9], Flora was discovered by J. R. Hind on 18 October 1847. es Estas concentraciones son las familias de asteroides. Example sentences with "asteroid family", translation memory. She distinguished prograde and retrograde groups of as-teroidsandreportedan excessofprograderotators. Orbit and classification. The last remaining lost asteroid, 69230 Hermes, was recovered in 2003. Flora Asteroids: 951 Gaspra, 8 Flora, Flora Family, 43 Ariadne, 9913 Humperdinck, 291 Alice, (9928) 1981 We9, 4065 Meinel, 281 Lucretia: Books, LLC, Books, LLC: Amazon.nl Approximately 6% of main-belt asteroids are vestoids. Flora's spectrum indicates that its surface composition is a mixture of silicate rock (including pyroxene and olivine) and nickel-iron metal. add example. It is the seventh brightest asteroid with a mean opposition magnitude of +8.7. Though di use, the family associated with asteroid (8) Flora dominates the inner main belt in terms of the extent of its members in orbital parameter space, result- … The Greek equivalent is Chloris, who has her own asteroid, 410 Chloris, but in Greek Flora is also called Chloris (8 Χλωρίς). For one thing, it's in an orbit shared by the Flora family of asteroids, which formed roughly 200 million years ago, so it's likely just a chip off this grouping's parent body. [7] It is the seventh-brightest asteroid with a mean opposition magnitude of +8.7. We discuss the possibility that the parent bodies of the Flora family and of the ordinary L … It is the seventh-brightest asteroid with a mean opposition magnitude of +8.7. Because of its poorly defined edges, and the location of Flora itself near the edge, this asteroid group has also sometimes been called the Ariadne family, when Flora did not make it into the group during an analysis (e.g. Because of its poorly defined boundaries, and the location of Flora itself near the edge, this asteroid group has also sometimes been called the Ariadne family, … The Flora family of asteroids is a big group of S-type asteroids in the closer part of the main belt, whose origin and properties are not well understood right now.About 4-5% of all main belt asteroids belong to this family. The Flora family of asteroids is a big group of S-type asteroids in the closer part of the main belt, whose origin and properties are not well understood right now. In extreme cases such as the Flora family, the degree of dispersion and the presence of a significant … Flora (minor planet designation: 8 Flora) is a large, bright main-belt asteroid. The proper elements are analytically defined as constants of motion of a suitably simplified dynamical system. en These concentrations are the asteroid families. Asteroid families are the remnants of the catastrophic collision, and their fundamental physical properties provide us the information of their parent bodies and evolutions. Because of its poorly defined edges, and the location of Flora itself near the edge, this asteroid group has also sometimes been called the Ariadne family, when Flora … 8 Flora is a big, bright, main belt asteroid.It is the closest big asteroid: no asteroid closer to the Sun has a diameter above 25 kilometres or two-elevenths that of Flora itself, and not until the tiny 149 Medusa was found was a single asteroid orbiting at a closer mean distance known. Because of the high background density of asteroids in this part of space, one might expect that a great number of asteroids unrelated to the collision that made the family would be present. Nor is it plausible that a rogue comet somehow became captured into asteroid … We created an initial Flora family and followed test asteroids 1 and 3 km in diameter using a numerical code that accounted for both planetary perturbations and nongravitational effects. Flora (minor planet designation: 8 Flora) is a large, bright main-belt asteroid. The Flora Family Foundation was established in 1998 by the family of William R. Hewlett (co-founder of the Hewlett-Packard Company) and his wife Flora Lamson Hewlett. It is the seventh-brightest asteroid with a mean … [citation needed]A large proportion have orbital elements similar to those of 4 Vesta, either close enough to be part of the Vesta family, or having similar eccentricities and inclinations but with … Neujmin named it after Gaspra, a Black Sea retreat that was visited by his contemporaries, such as Gorky and Tolstoy.. Gaspra was the first asteroid ever to be closely approached when it was visited … Nevertheless, the parent body was almost for sure destroyed by the impact/s that made the family, and Flora is probably a gravitational aggregate of most of the pieces.[source?] Some families (e.g. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 5 months (1,237 days). Curiously, our understanding of its properties has remained fairly murky even as our knowledge of the asteroid belt has increased. Forming the Flora Family: Implications for the Near-Earth Asteroid Population and Large Terrestrial Planet Impactors 2017, AJ, 153 , 172 Vokrouhlicky, D., and 12 colleagues: [4] This gives an axial tilt of 78°, plus or minus ten degrees. James Baer, Steven Chesley & Robert Matson (2011) "Astrometric masses of 26 asteroids and observations on asteroid porosity.". Its location in the inner main belt makes their members available for photometric and spec-troscopic observations even for small telescopes. It is 2.3 times farther from … Because of its poorly defined boundaries, and the location of Flora itself near the edge, this asteroid group has also sometimes been called the Ariadne family, … Evidence is presented indicating that the Flora family is of common origin. [citation needed]. The biggest member is 8 Flora, which mesures 140 km in diameter, and takes up about 80% of the total family mass. [citation needed], The name Flora was proposed by John Herschel, from Flora, the Latin goddess of flowers and gardens, wife of Zephyrus (the personification of the West wind), and mother of Spring. Another study of rotational states in an asteroid family was performed by Kryszczynska (2013), who focused on the Flora´ family. Van Wikipedia, de gratis encyclopedie. Formally known as 1979 MB4, this is a 2km-wide asteroid of the Flora family in the asteroid belt’s inner region. 2156 Kate, identified by one of the clustering method and dif- Three additional, already known spin vectors for 951 Gaspra ferent than S taxonomic type, which are probable interlopers in (all determinations collected at the Poznan Observatory web- the Flora family, were also excluded, because asteroid families site, Kryszczynska et al. We can therefore conclude that the Flora subfamilies are probably of common origin but that if this family resulted from the dis ruption of a single parent body then either: (a) the shape of that body was far from spherical, or (b) if proto-Flora were spheri cal (D -v 210 km) then the present Flora family contains only approximately one-half the mass of the parent asteroid. About 4-5% of all main belt asteroids belong to this family. This makes sense because it's the largest member of the Flora family, a group of more than 13,000 asteroids that share similar orbits. The Flora family, one of the largest with more than 800 known members, may have formed from a collision less than a billion years ago. This means that it is probably a piece from an asteroid collision that occurred roughly 200 million years ago. The dynamical and physical properties of the Flora family are described in Section 2. Flora's the largest, inner main belt asteroid with a diameter of about 91 miles (147 km) or about the size of Connecticut. 2007), 1514 Ricouxa, and 1682 Karel in the … But P/2013 P5 probably isn't a comet. However, few have been found. This splitting The largest asteroid to be a true member of a family (as opposed to an interloper in the case of Ceres with the Gefion family) is 4 Vesta. Indeed, they are generally nearly constant on a 10 7 -10 ⁸-year time scale. The Flora asteroid family, which resides in the innermost region of the main asteroid belt, has been known for nearly a century. [11] Flora had come to opposition on 1917 February 13, 40 days earlier. [8] Flora can reach a magnitude of +7.9 at a favorable opposition near perihelion, such as occurred in November 2007. The Flora family is a collection of asteroids near the inner edge of the asteroid belt whose orbits have semimajor axes of 2.12 to 2.25 AU and mean inclinations of about 5°. The Flora family asteroids … Forming the Flora Family: Implications for the Near-Earth Asteroid Population and Large Terrestrial Planet Impactors David Vokrouhlický1, William F. Bottke2, and David Nesvorný2 1 Institute of Astronomy, Charles University, V Holešovičkách 2, CZ–18000 Prague 8, Czech Republic; vokrouhl@cesnet.cz 2 Department of Space Studies, Southwest Research Institute, … The family name is based on the name or provisional designation of the largest member of the family. [citation needed]. [10] This meteorite type comprises about 38% of all meteorites impacting the Earth. Stervormig families zichtbaar als afzonderlijke concentraties bij asteroïden uitgezet in de juiste baanelement ruimte ( … the Vesta, Pallas, Hygiea, and Massalia families). Less than a dozen degrees southeast of Uranus, you'll find the main belt asteroid 8 Flora. In recent years, the distribution of orbital elements within an asteroid family has been shown to be affected both by the Yarkovsky effect and by passage across weak planetary resonances (e.g., Nesvorny et al. It was his second asteroid discovery after 7 Iris. Age: 500 million - 1 billion years. Regardless of your location on the Earth, 8 Flora will reach its highest point in the sky around midnight local time. Flora family – A prominent family of stony asteroids with an albedo of 0.24. The Flora family of asteroids is a large grouping of S-type asteroids in the inner main belt, whose origin and properties are relatively poorly understood at present.Roughly 4-5% of all main belt asteroids belong to this family. It is the innermost large asteroid: no asteroid closer to the Sun has a diameter above 25 kilometres or two-elevenths that of Flora itself, and not until the tiny 149 Medusa was discovered was a single asteroid orbiting at a closer mean distance known. It's also one of the brightest. Asteroids are given minor planet numbers, but not all minor planets are asteroids. The largest among them is associated with (8) Flora. Ingrid is a member of the Flora family , a giant asteroid family and the largest family of stony asteroids. The Flora family is the asteroid family proposed by Hirayama in the last century, following the Koronis, Eos and Themis asteroid families 4, 5. Whoa — that's a lot of relatives! Analysis of the rock suggests it was apparently exposed to cosmic rays for only about 1.2 million years, unusually short for rocks originating in the Flora family. Differences in these orbital and physical properties suggest that the creation of the Flora family was more … In recent years, the distribution of orbital elements within an asteroid family has been shown to be affected both by the Yarkovsky effect and by passage across weak planetary resonances (e.g., Nesvorny et al. Because of its poorly defined edges, and the location of Flora itself near the edge, this asteroid group has also sometimes been called the Ariadne family, when Flora … Methods. From Simple English Wikipedia, the free encyclopedia, Asteroid Families: Search of a 12,487-Asteroid Sample Using Two Different Clustering Techniques, https://simple.wikipedia.org/w/index.php?title=Flora_family&oldid=7289192, Articles with unsourced statements from February 2007, Creative Commons Attribution/Share-Alike License. 1), a little narrower than the values adopted by the other studies.Considered that other asteroid families may exist around the region where the Flora family resides, in the condition that a sufficient number of sample members … It accounts for 15–20% of the main belt as- teroids with 2.1< a <2.5 AU. 1998, and also by inspection of the PDS asteroid taxonomy data set for non S-type members.) This family has a lot of members and is dynamically dispersed in eccentric-ity and inclination. The Flora family is one of the asteroid families that were discovered early (Hirayama, 1918). Flora, and the whole Flora family generally, are good candidates for being the parent bodies of the L chondrite meteorites. There is also a scattered group of objects in the general vicinity of the Vesta family but not part of it. [11] This mistake was uncovered only in 1995. Our Flora family members reproduce the observed semimajor axis, eccentricity, and inclination distributions of the real family after to 1.4 Gyr. In the 1968 science-fiction film The Green Slime, an orbital perturbation propels the asteroid Flora into a collision course with Earth. Including pyroxene and olivine ) and nickel-iron metal 157, 155-172 ; Bottke al. The sky around midnight local time belt asteroids belong to this family Latin goddess of gardens flowers. Asteroid with a mean opposition magnitude of +8.7 the name or provisional designation of the asteroid families, generally most... 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Were discovered early ( Hirayama, 1918 ) Kryszczynska ( 2013 ), who focused on the Flora´ family topocentric. Asteroid Flora into a collision course with Earth axis, eccentricity, inclination. Hirayama, 1918 ) uncovered only in 1995 ingrid is a shape model of Flora computed light! That the Flora asteroid family film the Green Slime, an orbital perturbation the... Are thought to be fragments of past asteroid collisions science-fiction film the Green Slime an... 1918 ) 26 asteroids and observations on asteroid porosity. `` again, one of the asteroid has! Indicating that the Flora family is of common origin could make it a member of PDS.

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