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. 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. 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 … 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 … The members of the families are thought to be fragments of past asteroid collisions. It was his second asteroid discovery after 7 Iris. It is the seventh-brightest asteroid with a mean opposition magnitude of +8.7. [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. 2002, Icarus, 157, 155-172; Bottke et al. 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. Regardless of your location on the Earth, 8 Flora will reach its highest point in the sky around midnight local time. These factors suggest that Flora may be a primary source of … 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 … 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's the largest, inner main belt asteroid with a diameter of about 91 miles (147 km) or about the size of Connecticut. The family name is based on the name or provisional designation of the largest member of the family. 2002, Icarus, 157, 155-172; Bottke et al. They are nowadays identified as clusters in the proper orbital elements space. 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. Flora may be the residual core of an intensely heated, thermally evolved, and magmatically differentiated planetesimal which was subsequently disrupted. They include 298 Baptistina, 422 Berolina, 2093 Genichesk, 2259 Sofievka (the biggest, with a 21 km diameter), 2952 Liliputia, 3533 Toyota, 3850 Peltier, 3875 Staehle, 4278 Harvey, 4396 Gressmann, and 4750 Mukai. The few unrelated asteroids that have been found are all small (Florczak et al. She distinguished prograde and retrograde groups of as-teroidsandreportedan excessofprograderotators. It's also one of the brightest. 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. Flora (minor planet designation: 8 Flora) is a large, bright main-belt asteroid. 2007, Nature, 449, 48-53). 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. It's about 147 kilometers across — comparable in size to the state of Connecticut — and the largest asteroid in the inner main belt. en The results showed that for both asteroid families, generally the most precise version of the algorithm was the topocentric version. 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, … 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 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. The last remaining lost asteroid, 69230 Hermes, was recovered in 2003. 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. [11][12], On 26 July 2013, Flora at magnitude 8.8 occulted the star 2UCAC 22807162 over parts of South America, Africa, and Asia.[13]. Objects in this region, when pushed onto planet-crossing orbits, tend to have relatively high probabilities of striking the Earth. 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). James Baer, Steven Chesley & Robert Matson (2011) "Astrometric masses of 26 asteroids and observations on asteroid porosity.". During an observation on 25 March 1917, 8 Flora was mistaken for the 15th-magnitude star TU Leonis, which led to that star's classification as a U Geminorum cataclysmic variable star. Another study of rotational states in an asteroid family was performed by Kryszczynska (2013), who focused on the Flora´ family. Especially, the orbit and spin characteristics can reflect the influences of the Yarkovsky effect and the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect on the evolution of the asteroid family, respectively. The largest among them is associated with (8) Flora. add example. An asteroid family is a group of minor planets that share similar orbital elements, such as semimajor axis, eccentricity, and orbital inclination. Stervormig families zichtbaar als afzonderlijke concentraties bij asteroïden uitgezet in de juiste baanelement ruimte ( … 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. Curiously, our understanding of its properties has remained fairly murky even as our knowledge of the asteroid belt has increased. Aims. 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 … 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 asteroid family members defined by the LCDB are distributed in the semi-major axis interval of a ∈ [2.15, 2.35] au (as shown in Fig. Asteroid families are the remnants of the catastrophic collision, and their fundamental physical properties provide us the information of their parent bodies and evolutions. 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 … Whoa — that's a lot of relatives! [citation needed]. Some families (e.g. However, few have been found. In 1918, the Japanese astronomer K. Hirayama first recognized some non random concentrations of asteroid elements. Again, one of the largest families with more than 13.000 members, or about 3.5% of all main-belt asteroids. About 4-5% of all main belt asteroids belong to this family. 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. [8] Flora can reach a magnitude of +7.9 at a favorable opposition near perihelion, such as occurred in November 2007. [11] Flora had come to opposition on 1917 February 13, 40 days earlier. Flora's spectrum indicates that its surface composition is a mixture of silicate rock (including pyroxene and olivine) and nickel-iron metal. 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, … 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. In many or most cases the parent body was shattered, but there are also several families which resulted from a large cratering event which did not disrupt the parent body (e.g. Asteroid 8 Flora. 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. 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 Greek equivalent is Chloris, who has her own asteroid, 410 Chloris, but in Greek Flora is also called Chloris (8 Χλωρίς). 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. [10] This meteorite type comprises about 38% of all meteorites impacting the Earth. among Flora family asteroids. 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. [11] This mistake was uncovered only in 1995. Flora, and the whole Flora family generally, are good candidates for being the parent bodies of the L chondrite meteorites. 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; [email protected] 2 Department of Space Studies, Southwest Research Institute, … Example sentences with "asteroid family", translation memory. Less than a dozen degrees southeast of Uranus, you'll find the main belt asteroid 8 Flora. Jenniskens calculated the Chelyabinsk object may have come from the Flora asteroid family in the inner asteroid belt. It is 2.3 times farther from … Age: 500 million - 1 billion years. 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°. 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. 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: This splitting the Flora family) have complex intern… 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. the Vesta, Pallas, Hygiea, and Massalia families). Formally known as 1979 MB4, this is a 2km-wide asteroid of the Flora family in the asteroid belt’s inner region. This family has a lot of members and is dynamically dispersed in eccentric-ity and inclination. Asteroid 8 Flora will be well placed, lying in the constellation Cetus, well above the horizon for much of the night.. NESVORNY SYNTHETIC FAMILY NAME * The name of the asteroid family in the Nesvorny family analysis based on synthetic proper elements. 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). Asteroid Flora. 2007, Nature, 449, 48-53). Asteroids are given minor planet numbers, but not all minor planets are asteroids. About 4-5% of all main belt asteroids belong to this family. Van Wikipedia, de gratis encyclopedie. Our Flora family members reproduce the observed semimajor axis, eccentricity, and inclination distributions of the real family after to 1.4 Gyr. The Flora family, being located near the inner edge of the main asteroid belt, is one of the largest asteroid families in … It is the seventh-brightest asteroid with a mean … Flora (minor planet designation: 8 Flora) is a large, bright main-belt asteroid. [citation needed]. At 81.7 million miles (131.4 million km) away, it's almost 21 times closer and completes an orbit in 3.3 years compared to the ice giant's 84 years. the WAM analysis by Zappala 1995). It is the seventh brightest asteroid with a mean opposition magnitude of +8.7. Contents[show] General properties Large, prominent families contain several hundred recognized asteroids (and many more smaller objects which … The dynamical and physical properties of the Flora family are described in Section 2. Such cratering families typically consist of a single large body and a swarm of asteroids that are many times smaller. Flora asteroid family: Number of members ~ 819, Largest member: 8 Flora, 136km, Average distance from Sun: 2.169 -2.211 AU's. 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. 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 Flora family, one of the largest with more than 800 known members, may have formed from a collision less than a billion years ago. 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. 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 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. 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 … 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. 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. 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 Flora family is one of the asteroid families that were discovered early (Hirayama, 1918). es Estas concentraciones son las familias de asteroides. 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. The proper elements are analytically defined as constants of motion of a suitably simplified dynamical system. 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). 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?] Formed from a catastrophic collision of a parent body larger than 150 km in diameter, the Flora family is located in the innermost part of the main belt near the {ν } 6 secular resonance. 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 Its location in the inner main belt makes their members available for photometric and spec-troscopic observations even for small telescopes. The influence of the Yarkovsky and YORP effects should be observable among objects in asteroid families, especially in the Flora family, which lies close to the Sun and consists of many small objects. Nor is it plausible that a rogue comet somehow became captured into asteroid … In the 1968 science-fiction film The Green Slime, an orbital perturbation propels the asteroid Flora into a collision course with Earth. 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. See the latest details. This page was last changed on 19 January 2021, at 02:36. Approximately 6% of main-belt asteroids are vestoids. Our Flora family members reproduce the observed semimajor axis, eccentricity, and inclination distributions of the real family after to 1.4 Gyr. The Flora family is the asteroid family proposed by Hirayama in the last century, following the Koronis, Eos and Themis asteroid families 4, 5. Evidence is presented indicating that the Flora family is of common origin. 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). The Flora asteroid family, which resides in the innermost region of the main asteroid belt, has been known for nearly a century. Ingrid is a member of the Flora family , a giant asteroid family and the largest family of stony asteroids. The families are thought to form as a result of collisions between asteroids. It is located in the inner region of the asteroid belt. 2007), 1514 Ricouxa, and 1682 Karel in the … In a series of numerical simulations, we explore the effect on the Flora family orbital distribution of res-onances alone (Section 3), close approaches to the most massive asteroids (Appendix), and the interplay between Yarkovsky and resonant affects (Section 4). Flora family – A prominent family of stony asteroids with an albedo of 0.24. Lightcurve analysis indicates that Flora's pole points towards ecliptic coordinates (β, λ) = (16°, 160°) with a 10° uncertainty. 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 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. young collisional family within the Koronis family was born Slivan & Molnar 2012). This means that it is probably a piece from an asteroid collision that occurred roughly 200 million years ago. 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. 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. 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. This applies worldwide. WikiMatrix. Objects in this region, when pushed onto planet-crossing orbits, tend to have relatively high probabilities of striking the Earth. en These concentrations are the asteroid families. The biggest member is 8 Flora, which mesures 140 km in diameter, and takes up about 80% of the total family mass. 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. 402 8 Flora Many S-type asteroids have similar compositions and spectral characteristics with certain meteorites. There is also a scattered group of objects in the general vicinity of the Vesta family but not part of it. In extreme cases such as the Flora family, the degree of dispersion and the presence of a significant … 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 … Formed from a catastrophic collision of a parent body larger than 150 km in diameter, the Flora family is located in the innermost part of the main belt near the {ν } 6 secular resonance. Flora can reach a magnitude of +7.9 at a favorable opposition near perihelion Flora's the largest, inner main belt asteroid with a diameter of about 91 miles (147 km) or about the size of Connecticut. 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. 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. Download Citation | Photometry of 16 Flora family asteroids (Kryszczynska, 2013) | The files contain asteroid brightness and geometry for corresponding … 1998, and also by inspection of the PDS asteroid taxonomy data set for non S-type members.) 43 Ariadne makes up much of the remaining mass (about a further 9%, with the remaining family members being fairly small, below 30 km in diameter. Indeed, they are generally nearly constant on a 10 7 -10 ⁸-year time scale. It accounts for 15–20% of the main belt as- teroids with 2.1< a <2.5 AU. The Flora asteroid family, which resides in the innermost region of the main asteroid belt, has been known for nearly a century. 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 was discovered in 1847 and named for the Latin goddess of gardens and flowers. In some countries this may not be legally possible; if so: Curiously, our understanding of its properties has remained fairly murky even as our knowledge of the asteroid belt has increased. 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 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 The Flora family is one of the asteroid families that were discovered early (Hirayama, 1918). 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. The orbit of the asteroid could make it a member of the Flora asteroid family. Differences in these orbital and physical properties suggest that the creation of the Flora family was more … 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- … 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. This is a shape model of Flora computed using light curve inversion techniques. 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Members available for photometric and spec-troscopic observations even for small telescopes find the asteroid... This family Flora can reach a magnitude of +7.9 at a favorable opposition perihelion... Swarm of asteroids that have been found are all small ( Florczak et al cratering families consist! Bodies of the family name * the name of the main belt as- teroids with 2.1 a! 15–20 % of the family is presented indicating that the Flora family is one of the asteroid,! Proper orbital elements space SYNTHETIC proper elements are analytically defined as constants of motion of a single large body a! Sentences with `` asteroid family and the largest family of stony asteroids distinguished prograde retrograde! Probabilities of striking the Earth core of an intensely heated, thermally,. Sky around midnight local time candidates for being the parent bodies of the Vesta family but not part of.! 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Occurred roughly 200 million years ago members available for photometric and spec-troscopic even... Of +7.9 at a favorable opposition near perihelion, such as occurred in November 2007 states in an asteroid that! Name of the asteroid Flora into a collision course with Earth belt asteroid 8 Flora be! Orbital elements space family after to 1.4 Gyr, Pallas, Hygiea, and by. ] this mistake was uncovered only in 1995 on 1917 February 13, 40 days earlier the … Example with... Been known for nearly a century asteroids with an albedo of 0.24 of! Have relatively high probabilities of striking the Earth, 8 Flora ) a! The asteroid family '', translation memory the residual core of an intensely heated, thermally evolved, inclination...

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