Dynamical Erosion of the Asteroid Belt and Implications for Large Impacts in the Inner Solar System
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On the V-Type Asteroids Outside the Vesta Family. I. Interplay Of
Astronomy & Astrophysics manuscript no. carruba September 16, 2018 (DOI: will be inserted by hand later) On the V-type asteroids outside the Vesta family I. Interplay of nonlinear secular resonances and the Yarkovsky effect: the cases of 956 Elisa and 809 Lundia V. Carruba1, T. A. Michtchenko1 , F. Roig2, S. Ferraz-Mello1, and D. Nesvorn´y3, 1 IAG, Universidade de S˜ao Paulo, S˜ao Paulo, SP 05508-900, Brazil e-mail: [email protected] 2 Observat´orio Nacional, Rio de Janeiro, RJ 20921-400, Brazil e-mail: [email protected] 3 Southwest Research Institute, Department of Space Studies, Boulder, Colorado 80302 e-mail: [email protected] Received May 2nd 2005; accepted June 22nd 2005. Abstract. Among the largest objects in the main belt, asteroid 4 Vesta is unique in showing a basaltic crust. It is also the biggest member of the Vesta family, which is supposed to originate from a large cratering event about 1 Gyr ago (Marzari et al. 1996). Most of the members of the Vesta family for which a spectral classification is available show a V-type spectra. Due to their characteristic infrared spectrum, V-type asteroids are easily distinguished. Before the discovery of 1459 Magnya (Lazzaro et al. 2000) and of several V-type NEA (Xu 1995), all the known V-type asteroids were members of the Vesta family. Recently two V-type asteroids, 809 Lundia and 956 Elisa, (Florczak et al. 2002) have been discovered well outside the limits of the family, near the Flora family. We currently know 22 V-type asteroids outside the family, in the inner asteroid belt (see Table 2). -
O Lunar and Planetary Institute Provided by the NASA Astrophysics Data System 1516 Lpscmv LARGE FLOOR-FRACTURED CRATERS: R.W
LPSCXXIV 1515 LARGE FLOOR-FRACTURED CRATERS AND ISOSTATIC CRATER MODIFICATION: IMPLICATIONS FOR LITHOSPHERIC THICKNESS ON VENUS. R.W. Wichman, Dept. of Space Studies, Univ. of North Dakota, Grand Forks, ND 58202-7306 and P.H. Schultz, Dept. of Geological Sciences, Brown Univ., Providence RI 02912 Introduction: Several of the largest craters on Venus, including Mead, Meitner and Isabella, exhibit well-developed floor fracture patterns combining a central set of radial features with a peripheral set of concentric fractures. This pattern strongly resembles the fracture patterns observed in the largest floor- fractured craters on the Moon (eg. Humboldt, Gauss, Petavius). Although most lunar floor-fractured craters apparently reflect crater modification by igneous intrusions and volcanism [I,2,3], we propose that the fractures in these larger craters represent domical flexure events in response to post-impact isostatic uplift. Since the extent of uplift and surface failure in this model depends on both the size of the basin cavity and the local lithospheric thickness, this interpretation also provides a means for constraining lithospheric thicknesses on Venus. Based on the apparent onset diameter of isostatic crater modification, we derive lithospheric thickness estimates for the Moon of -80-100 km, and for Venus of -50-70 km. Large Floor-fractured Craters: As noted in a companion abstract [4], ten craters on Venus show patterns of concentric or polygonal fractures resembling failure patterns observed in lunar floor-fractured craters. These craters are comparable in size (-20-90 km) to most of the lunar examples, and three craters in particular contain well-defined, moat-like structures around a scarp-bounded central floor plate identical to features observed in the most extensively modified craters on the Moon [5]. -
List of Scientific Presentations
First Workshop on Binaries in the Solar System August 20-23, 2007 Steamboat Springs, Colorado USA Scientific Presentations First Author Institution Presentation Title Benner JPL Radar images of ten binary near-Earth asteroids Britt Univ Central Florida The density and porosity of binary asteroids Buie Lowell Observatory Dynamical and physical studies of the Pluto system Chapman Southwest Research Inst Implications for small-body binaries from doublet craters Conrad Keck Observatory Shape, size, and pole of resolved asteroids Durda SwRI / NASA Headquarters Numerical models of the formation of asteroid satellites in large impacts Enke Southwest Research Inst Satellite-forming impact simulations: past, present, and funded future Fahnestock Univ Michigan The dynamics of binary NEAs and their evolution: Perspectives from the KW4 investigation Grundy Lowell Observatory A new, large HST large survey of trans-neptunian binary orbits: Strategy and early results Harris Space Science Inst How binaries color themselves green, and other just-so stories Holsapple Univ Washington The spin fission of small asteroids into binaries Howell Arecibo Observatory Radar detection of binary asteroids Kern Space Telescope Science Inst Variability of Kuiper Belt binaries Kitazato Univ Tokyo Decelerating spin state of 25143 Itokawa due to YORP effect (poster) Kryszczynska Astron. Observatory, Poznan, Poland 809 Lundia - a new synchronous V-type binary in the Flora family Lacerda Univ Hawaii The abundance of contact binaries in the Kuiper Belt Maley United Space -
Asteroid Regolith Weathering: a Large-Scale Observational Investigation
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 5-2019 Asteroid Regolith Weathering: A Large-Scale Observational Investigation Eric Michael MacLennan University of Tennessee, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Recommended Citation MacLennan, Eric Michael, "Asteroid Regolith Weathering: A Large-Scale Observational Investigation. " PhD diss., University of Tennessee, 2019. https://trace.tennessee.edu/utk_graddiss/5467 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Eric Michael MacLennan entitled "Asteroid Regolith Weathering: A Large-Scale Observational Investigation." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Geology. Joshua P. Emery, Major Professor We have read this dissertation and recommend its acceptance: Jeffrey E. Moersch, Harry Y. McSween Jr., Liem T. Tran Accepted for the Council: Dixie L. Thompson Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Asteroid Regolith Weathering: A Large-Scale Observational Investigation A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Eric Michael MacLennan May 2019 © by Eric Michael MacLennan, 2019 All Rights Reserved. -
The Minor Planet Bulletin
THE MINOR PLANET BULLETIN OF THE MINOR PLANETS SECTION OF THE BULLETIN ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS VOLUME 38, NUMBER 2, A.D. 2011 APRIL-JUNE 71. LIGHTCURVES OF 10452 ZUEV, (14657) 1998 YU27, AND (15700) 1987 QD Gary A. Vander Haagen Stonegate Observatory, 825 Stonegate Road Ann Arbor, MI 48103 [email protected] (Received: 28 October) Lightcurve observations and analysis revealed the following periods and amplitudes for three asteroids: 10452 Zuev, 9.724 ± 0.002 h, 0.38 ± 0.03 mag; (14657) 1998 YU27, 15.43 ± 0.03 h, 0.21 ± 0.05 mag; and (15700) 1987 QD, 9.71 ± 0.02 h, 0.16 ± 0.05 mag. Photometric data of three asteroids were collected using a 0.43- meter PlaneWave f/6.8 corrected Dall-Kirkham astrograph, a SBIG ST-10XME camera, and V-filter at Stonegate Observatory. The camera was binned 2x2 with a resulting image scale of 0.95 arc- seconds per pixel. Image exposures were 120 seconds at –15C. Candidates for analysis were selected using the MPO2011 Asteroid Viewing Guide and all photometric data were obtained and analyzed using MPO Canopus (Bdw Publishing, 2010). Published asteroid lightcurve data were reviewed in the Asteroid Lightcurve Database (LCDB; Warner et al., 2009). The magnitudes in the plots (Y-axis) are not sky (catalog) values but differentials from the average sky magnitude of the set of comparisons. The value in the Y-axis label, “alpha”, is the solar phase angle at the time of the first set of observations. All data were corrected to this phase angle using G = 0.15, unless otherwise stated. -
Artbook & Distributed Art Publishers Artbook D.A.P
artbook & distributed art publishers distributed artbook D.A.P. SPRING 2017 CATALOG Matthew Ronay, “Building Excreting Purple Cleft Ovoids” (2014). FromMatthew Ronay, published by Gregory R. Miller & Co. See page 108. FEATURED RELEASES 2 Journals 77 CATALOG EDITOR SPRING HIGHLIGHTS 84 Thomas Evans Art 86 ART DIRECTOR Writings & Group Exhibitions 117 Stacy lakefield Photography 122 IMAGE PRODUCTION Maddie Gilmore Architecture & Design 140 COPY lRITING Janine DeFeo, Thomas Evans, Annabelle Maroney, Kyra Sutton SPECIALTY BOOKS 150 PRINTING Sonic Media Solutions, Inc. Art 152 Group Exhibitions 169 FRONT COVER IMAGE Photography 172 Kazimir Malevich, “Red House” (detail), 1932. From Revolution: Russian Art 1917–1932, published by Royal Academy of Arts. See page 5. Backlist Highlights 178 BACK COVER IMAGE Dorothy Iannone, pages from A CookBook (1969). Index 183 From Dorothy Iannone: A CookBook, published by JRP|Ringier. See page 51. CONTRIBUTORS INCLUDE ■ BARRY BERGDOLL Curator, Department of Architecture and Design, The Museum of Modern Art and Meyer Schapiro Professor of Art History and Archaeology, Department of Art History, Columbia University ■ JOHN MICHAEL DESMOND Professor, College of Art & Design, Louisiana State University ■ CAROLE ANN FABIAN Director, Avery Architectural & Fine Arts Library, Columbia University ■ JENNIFER GRAY Project Research Assistant, Department of Architecture and Design, The Museum of Modern Art ■ ELIZABETH S. HAWLEY PhD Candidate, The Graduate Center, City University of New York ■ JULIET KINCHIN Curator, Department of Architecture and Design, The Museum of Modern Art ■ NEIL LEVINE Emmet Blakeney Gleason Research Professor of History of Art and Architecture, Modern Architecture, Harvard University ■ ELLEN MOODY Assistant Projects Conservator, The Museum of Modern Art ■ KEN TADASHI OSHIMA Professor, Department of Architecture, University of Washington Frank Lloyd Wright: Unpacking the Archive ■ MICHAEL OSMAN Edited by Barry Bergdoll, Jennifer Gray. -
VENUS Corona M N R S a Ak O Ons D M L YN a G Okosha IB E .RITA N Axw E a I O
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Multiple Asteroid Systems: Dimensions and Thermal Properties from Spitzer Space Telescope and Ground-Based Observations Q ⇑ F
Icarus 221 (2012) 1130–1161 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations q ⇑ F. Marchis a,g, , J.E. Enriquez a, J.P. Emery b, M. Mueller c, M. Baek a, J. Pollock d, M. Assafin e, R. Vieira Martins f, J. Berthier g, F. Vachier g, D.P. Cruikshank h, L.F. Lim i, D.E. Reichart j, K.M. Ivarsen j, J.B. Haislip j, A.P. LaCluyze j a Carl Sagan Center, SETI Institute, 189 Bernardo Ave., Mountain View, CA 94043, USA b Earth and Planetary Sciences, University of Tennessee, 306 Earth and Planetary Sciences Building, Knoxville, TN 37996-1410, USA c SRON, Netherlands Institute for Space Research, Low Energy Astrophysics, Postbus 800, 9700 AV Groningen, Netherlands d Appalachian State University, Department of Physics and Astronomy, 231 CAP Building, Boone, NC 28608, USA e Observatorio do Valongo, UFRJ, Ladeira Pedro Antonio 43, Rio de Janeiro, Brazil f Observatório Nacional, MCT, R. General José Cristino 77, CEP 20921-400 Rio de Janeiro, RJ, Brazil g Institut de mécanique céleste et de calcul des éphémérides, Observatoire de Paris, Avenue Denfert-Rochereau, 75014 Paris, France h NASA, Ames Research Center, Mail Stop 245-6, Moffett Field, CA 94035-1000, USA i NASA, Goddard Space Flight Center, Greenbelt, MD 20771, USA j Physics and Astronomy Department, University of North Carolina, Chapel Hill, NC 27514, USA article info abstract Article history: We collected mid-IR spectra from 5.2 to 38 lm using the Spitzer Space Telescope Infrared Spectrograph Available online 2 October 2012 of 28 asteroids representative of all established types of binary groups. -
Characterization of Asteroids and Tnos Authors: T
Small Bodies Near and Far (SBNAF): Characterization of asteroids and TNOs Authors: T. G. Müller1, A. Marciniak2, Cs. Kiss3, R. Duffard4, V. Alí-Lagoa1, P. Bartczak2, M. Butkiewicz- Bąk2, G. Dudziński2, E. Fernández-Valenzuela4, G. Marton3, N. Morales4, J.-L. Ortiz4, D. Oszkiewicz2, T. Santana-Ros2, P. Santos-Sanz4, R. Szakáts3, A. Takácsné Farkas3, E. Varga-Verebélyi3 1: MPI für Extraterrestrische Physik (MPE), Garching, Germany. 2: Astronomical Observatory Institute (UAM), Poznań, Poland. 3: Konkoly Observatory, Budapest, Hungary. 4: Instituto de Astrofísica de Andalucía (IAA) - CSIC, Granada, Spain. Abstract: We present results from an EU Horizon2020-funded benchmark study (2016-2019) that addresses critical points in reconstructing physical and thermal prop- erties of near-Earth, main-belt, and trans-Neptunian objects. The combination of the visual and thermal data from the ground and from astrophysics space missions is key to improving the scientific understanding of these objects. The development of new tools is crucial for the interpretation of much larger data sets, but also for the operations and scientific exploitation of interplanetary missions. We combine different methods and techniques to get full information on selected bodies: lightcurve inversion, stellar occultations, thermophysical modeling, radiometric methods, radar ranging and adaptive optics imaging. The applications to objects with ground- truth information from interplanetary missions Hayabusa, NEAR-Shoemaker, Rosetta, and DAWN allow us to advance the techniques beyond the current state-of-the- art and to assess the limitations of each method. We present our recently developed tools, services, products, deliverables, and list important SBNAF publications. Results I: Tools & Services • ISAM service (http://isam.astro.amu.edu.pl/) contains shape models for more than 900 asteroids. -
N94- 28306 5 E,Z-2---"
t PI Contribution No. 825 81 N94- 28306 5 e,Z-2---" slightlyelevatedwesternmarginofthedepression.Fieldworkin SOME IMPLICATIONS OF LARGE IMPACT CRATERS 1989showedsandstoneoutcroppingonthiswesternmargin.Un- AND BASINS ON VENUS FOR TERRESTRIAL RINGED consolidatedsedimentsinthecenterofthestructureseemtobelake CRATERS AND PLANETARY EVOLUTION. W.B. deposits. McKinnon _ and J. S. Alexopoulos 2, 1Department of Earth and Plan- Site2: WelistthissiteimmediatelyaftersiteI becauseitis etary Sciences, Washington University, St. Louis MO 63130, USA, geographicallynear,buttheavailableevidenceforimpactoriginis 2McDonnell Center for the Space Sciences, Washington University, ambiguous.Thecenter is only 4 km east of site l ; a small airport, St. Louis MO 63130, USA. : : Sua Phra Camp, and the villages of Ban Nan Noi and Ban Nong Saena occupy elevated ground surrounding three sides of the Approximately 950 impact craters have been identified on the 0.8 radius, amphitheater-like depression that opens westward into " surface of Venus [e.g., I_,'rnainly in Magellan radar images. From : a small reservoir. The satellite image of the area is dominated by a combination of Earth-based Arecibo, Venera 15/16, and Magellan bleached ground indicating bare soil due possibly to grading or radar images, we have interpreted 72 as unequivocal peak-ring agriculture. craters and four as multiringed basins [2,3]. The morphological and Site 3: This site is located ~l 7 km southeast of Amphoe Det structural preservation of these craters is high, owing to the low Udom. The village of Ban Lup Lao is centered within a 3-kin-radius level of geologic activity on the venusian surface (which is in some partial bull's-eye pattern prominent on both the SPOT image and ways similar to the terrestrial benthic environment). -
Spring 2021 Honor Roll
Spring 2021 Honor Roll ADDISON BARTLETT Kelsey M Blackaller Roll of Excellence Roll of Honor Justin R Bogdan Shannel Davis Roxanne D Kuchta Donald J Bolger Michael J Bowe Justin B Brown ALSIP BEECHER Isabel Butler Roll of Merit Roll of Excellence Nicholas Campbell Breann R Moser Timothy Nelson II Maria C Castaneda Osvaldo Cerdas Roll of Merit Kourtney D Chapman APPLETON Elijah O Bamgbose Anya F Christian Roll of Excellence Catherine E Cronk Luke S Stovall Ravi A Daniel BELLWOOD Caleb Davis Roll of Merit Latavia R Davison AURORA Khadijah Sain Diana A Diaz Roll of Excellence Savanna B Dicostanzo Dennis Budde Emma M Dieckhaus Ulysses Chavez BELVIDERE Faith T Domercant Sarah E Hogan Roll of Excellence Thomas G Dynes Noah Hook Kristina M Sartori Curt Ederle Sydney D Moore Justin David I Escudero Marinna R Perez Brandon A Fagust James D Scott BENSENVILLE Syrena R Feustel Roll of Excellence Jalen C Fleming Roll of Honor Sean Heinz Raven R Fuqua Samara E Bosman Taha W Gabr Christopher Jules Matthew J Gahol Yuritzi Morales BOLINGBROOK Jose L Garcia Menelik Ramirez-rowe Roll of Excellence Emma R Geiger Raul Z Roman Jace Alexzander E Ancheta Gabrielle B Glees Amanda Selvaggio Adrienne R Andrews Moiz Habibi Sebastian S Wesley Nicole Antosik Aislin N Hargreaves Armando Armenta II Carson Harris Roll of Merit Kaitlynn R Barg Brycara J Hemmings Rianat M Adekola Kyle J Barg Katie Hernandez Brianna M Boccassini Christopher A Bayani Natalie M Hidalgo Parker Valek Nicole S Bebenov Donna Huang Emma K Beebe Alysa J Hyland Josie L Bell Keisha Bell Daphne A -
Asteroid Family Physical Properties, Numerical Sim- Constraints on the Ages of Families
Asteroid Family Physical Properties Joseph R. Masiero NASA Jet Propulsion Laboratory/Caltech Francesca DeMeo Harvard/Smithsonian Center for Astrophysics Toshihiro Kasuga Planetary Exploration Research Center, Chiba Institute of Technology Alex H. Parker Southwest Research Institute An asteroid family is typically formed when a larger parent body undergoes a catastrophic collisional disruption, and as such family members are expected to show physical properties that closely trace the composition and mineralogical evolution of the parent. Recently a number of new datasets have been released that probe the physical properties of a large number of asteroids, many of which are members of identified families. We review these data sets and the composite properties of asteroid families derived from this plethora of new data. We also discuss the limitations of the current data, and the open questions in the field. 1. INTRODUCTION techniques that rely on simulating the non-gravitational forces that depend on an asteroid’s albedo, diameter, and Asteroid families provide waypoints along the path of density. dynamical evolution of the solar system, as well as labo- In Asteroids III, Zappala` et al. (2002) and Cellino et ratories for studying the massive impacts that were com- al. (2002) reviewed the physical and spectral properties mon during terrestrial planet formation. Catastrophic dis- (respectively) of asteroid families known at that time. Zap- ruptions shattered these asteroids, leaving swarms of bod- pala` et al. (2002) primarily dealt with asteroid size distri- ies behind that evolved dynamically under gravitational per- butions inferred from a combination of observed absolute turbations and the Yarkovsky effect to their present-day lo- H magnitudes and albedo assumptions based on the subset cations, both in the Main Belt and beyond.