Fireball Trajectory, Photometry, Dynamics, Fragmentation, Orbit, and Meteorite Recovery
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Radar-Enabled Recovery of the Sutter's Mill Meteorite, A
RESEARCH ARTICLES the area (2). One meteorite fell at Sutter’sMill (SM), the gold discovery site that initiated the California Gold Rush. Two months after the fall, Radar-Enabled Recovery of the Sutter’s SM find numbers were assigned to the 77 me- teorites listed in table S3 (3), with a total mass of 943 g. The biggest meteorite is 205 g. Mill Meteorite, a Carbonaceous This is a tiny fraction of the pre-atmospheric mass, based on the kinetic energy derived from Chondrite Regolith Breccia infrasound records. Eyewitnesses reported hearing aloudboomfollowedbyadeeprumble.Infra- Peter Jenniskens,1,2* Marc D. Fries,3 Qing-Zhu Yin,4 Michael Zolensky,5 Alexander N. Krot,6 sound signals (table S2A) at stations I57US and 2 2 7 8 8,9 Scott A. Sandford, Derek Sears, Robert Beauford, Denton S. Ebel, Jon M. Friedrich, I56US of the International Monitoring System 6 4 4 10 Kazuhide Nagashima, Josh Wimpenny, Akane Yamakawa, Kunihiko Nishiizumi, (4), located ~770 and ~1080 km from the source, 11 12 10 13 Yasunori Hamajima, Marc W. Caffee, Kees C. Welten, Matthias Laubenstein, are consistent with stratospherically ducted ar- 14,15 14 14,15 16 Andrew M. Davis, Steven B. Simon, Philipp R. Heck, Edward D. Young, rivals (5). The combined average periods of all 17 18 18 19 20 Issaku E. Kohl, Mark H. Thiemens, Morgan H. Nunn, Takashi Mikouchi, Kenji Hagiya, phase-aligned stacked waveforms at each station 21 22 22 22 23 Kazumasa Ohsumi, Thomas A. Cahill, Jonathan A. Lawton, David Barnes, Andrew Steele, of 7.6 s correspond to a mean source energy of 24 4 24 2 25 Pierre Rochette, Kenneth L. -
Meteorite Collections: Sample List
Meteorite Collections: Sample List Institute of Meteoritics Department of Earth and Planetary Sciences University of New Mexico October 01, 2021 Institute of Meteoritics Meteorite Collection The IOM meteorite collection includes samples from approximately 600 different meteorites, representative of most meteorite types. The last printed copy of the collection's Catalog was published in 1990. We will no longer publish a printed catalog, but instead have produced this web-based Online Catalog, which presents the current catalog in searchable and downloadable forms. The database will be updated periodically. The date on the front page of this version of the catalog is the date that it was downloaded from the worldwide web. The catalog website is: Although we have made every effort to avoid inaccuracies, the database may still contain errors. Please contact the collection's Curator, Dr. Rhian Jones, ([email protected]) if you have any questions or comments. Cover photos: Top left: Thin section photomicrograph of the martian shergottite, Zagami (crossed nicols). Brightly colored crystals are pyroxene; black material is maskelynite (a form of plagioclase feldspar that has been rendered amorphous by high shock pressures). Photo is 1.5 mm across. (Photo by R. Jones.) Top right: The Pasamonte, New Mexico, eucrite (basalt). This individual stone is covered with shiny black fusion crust that formed as the stone fell through the earth's atmosphere. Photo is 8 cm across. (Photo by K. Nicols.) Bottom left: The Dora, New Mexico, pallasite. Orange crystals of olivine are set in a matrix of iron, nickel metal. Photo is 10 cm across. (Photo by K. -
The Meteoritical Society Newsletter 2011
The Meteoritical Society Newsletter (November 2011) IN THIS ISSUE Important reminders From the President Annual Meetings Renew your membership by Jan. 1! Don’t risk From the Treasurer missing issues of MAPS. And, mailing you Publications Reports reminders is expensive. Renew online at http://metsoc.meteoriticalsociety.net. MAPS GCA Nominate your colleagues and students for Elements awards! Deadlines are in January. See From the Nomenclature Committee Awards section for details. From the Membership Committee Awards Nominations for new fellows are due in Recently Announced Awards January. Nominations are welcome. Call for Nominations From the Secretary Proposals to host the 2016 MetSoc meeting Election of New Council are due in March. Contact the secretary for MetSocCom - Electronic Discussion procedures. Group Vote in the Elements Poll if you haven’t Website Is Moving voted already. I am pleased to report on the some of the major PRESIDENT’S EDITORIAL accomplishments of the past year and some plans for the future. The reports by the treasurer and chairs of I am honored to take over as president from major committees that follow provide many more Hiroko Nagahara and can report that the new council details. has operated successfully for nine months. The new council has met twice, in Houston in March and in Annual Meetings Greenwich in August. One subtheme of our meetings has been to look for new ways to maintain the interest The 74th annual meeting of the Meteoritical and participation of all society members. Another has Society was held at the University of Greenwich in the been to call the attention of the broader scientific Old Royal Naval College on the banks of the River community to our activities. -
The Meteoritical Society Committee on Meteorite Nomenclature
THE METEORITICAL SOCIETY COMMITTEE ON METEORITE NOMENCLATURE GUIDELINES FOR METEORITE NOMENCLATURE FEBRUARY 1980 Revised October 2000; October 2004; April 2005; October 2006; July 2010; March 2011; December 2011; May 2012; July 2012; August 2012; February 2015; July 2015; March 2019 [Addition of §4.2c] Contents GUIDELINES FOR METEORITE NOMENCLATURE ............................................................... 1 1. INTRODUCTION ................................................................................................................... 2 1.1 Objectives. ......................................................................................................................... 2 1.2 Scope. ................................................................................................................................ 2 2. APPLICATION AND REQUIREMENTS OF A METEORITE NAME ............................... 3 2.1 Unique names. ................................................................................................................... 3 2.2 Distinctive names. ............................................................................................................. 3 2.3 Precedents. ......................................................................................................................... 3 2.4 International usage............................................................................................................. 4 3. NEW METEORITE NAMES ................................................................................................ -
Identification of Meteorite Source Regions in the Solar System
Icarus 311 (2018) 271–287 Contents lists available at ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus Identification of meteorite source regions in the Solar System ∗ Mikael Granvik a,b, , Peter Brown c,d a Department of Physics, P.O. Box 64, 0 0 014 University of Helsinki, Finland b Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, Kiruna, Box 848, S-98128, Sweden c Department of Physics and Astronomy, University of Western Ontario, London N6A 3K7, Canada d Centre for Planetary Science and Exploration, University of Western Ontario, London N6A 5B7, Canada a r t i c l e i n f o a b s t r a c t Article history: Over the past decade there has been a large increase in the number of automated camera networks that Received 27 January 2018 monitor the sky for fireballs. One of the goals of these networks is to provide the necessary information Revised 6 April 2018 for linking meteorites to their pre-impact, heliocentric orbits and ultimately to their source regions in the Accepted 13 April 2018 solar system. We re-compute heliocentric orbits for the 25 meteorite falls published to date from original Available online 14 April 2018 data sources. Using these orbits, we constrain their most likely escape routes from the main asteroid belt Keywords: and the cometary region by utilizing a state-of-the-art orbit model of the near-Earth-object population, Meteorites which includes a size-dependence in delivery efficiency. While we find that our general results for escape Meteors routes are comparable to previous work, the role of trajectory measurement uncertainty in escape-route Asteroids identification is explored for the first time. -
Citizen Science with the Desert Fireball Network
EPSC Abstracts Vol. 13, EPSC-DPS2019-1178-2, 2019 EPSC-DPS Joint Meeting 2019 c Author(s) 2019. CC Attribution 4.0 license. Fireballs in the Sky: Citizen Science with the Desert Fireball Network Brian Day (1), Phil Bland (2), Renae Sayers (2) (1) NASA Solar System Exploration Research Virtual Institute. NASA Ames Research Center. Moffett Field, CA, USA. ([email protected]) (2) Curtin University. Perth, WA, Australia. ([email protected]) ([email protected]) Abstract Curtin University in Western Australia. It is led by Phil Bland of Curtin University. Fireballs in the Sky is an innovative Australian citizen science program that connects the public with 2. Observatory Design and Network the research of the Desert Fireball Network (DFN). The observatories are fully autonomous intelligent This research aims to understand the early workings imaging systems, capable of operating for 12 months of the solar system, and Fireballs in the Sky invites in a harsh environment without maintenance, and people around the world to learn about this science, storing all imagery collected over that period. Each contributing fireball sightings via a user-friendly observatory uses a 36MP consumer DSLR camera augmented reality mobile app. Tens of thousands of equipped with a fisheye lens providing spatial people have downloaded the app world-wide and precision of approximately one arcminute. The participated in the science of meteoritics. The DSLR is modified with a liquid crystal (LC) shutter. Fireballs in the Sky app allows users to get involved The LC shutter is used to break the fire-ball trail into with the Desert Fireball Network research, dashes for velocity calculation, after triangulation. -
The Ellerslie Meteorite: Description and Correction to Historical Find Site
Journal & Proceedings of the Royal Society of New South Wales, vol. 154, part 1, 2021, pp. 12–23. ISSN 0035-9173/21/010012-12 The Ellerslie Meteorite: Description and correction to historical find site William D. Birch Geosciences, Museums Victoria, Melbourne, Australia Email: [email protected] Abstract The 10.2 kg Ellerslie meteorite was donated to the National Museum of Victoria in May 1905 by Mr Henry Crawford, who informed the curator at that time that it had been found on the Ellerslie Estate in August 1900. The Ellerslie Estate, which Mr Crawford co-owned, is some 40 km east of Enngonia in northern New South Wales, adjacent to the Queensland border. In an unexplained historical error, the official find site for the Ellerslie meteorite has been recorded as “Tego, Maranoa, Queensland” in the 2000 Catalogue of Meteorites. This paper provides the first formal description of the meteorite, confirming it as an L5 ordinary chondrite showing mild shock features. It also investigates the source of the error in the historical record of the find site. Keywords: Ellerslie meteorite, find site, historical error, L5 ordinary chondrite, Tego. Introduction list of Australian meteorites. In the resulting Historical background paper, published in the Australian Museum Memoirs in 1939, Hodge-Smith stated that n 27 May 1905, Mr Henry Crawford the meteorite was “known 1905” from the paid a visit to the National Museum O Ellerslie Estate, “about 80 miles north of of Victoria (NMV) in Melbourne. He had a Bourke, New South Wales,” which was the gift for the museum, a large and heavy (10.2 locality as entered in the NMV’s register. -
Machine Learning for Semi-Automated Meteorite Recovery
Machine Learning for Semi-Automated Meteorite Recovery Seamus Anderson1*, Martin Towner1, Phil Bland1, Christopher Haikings2,3, William Volante4, Eleanor Sansom1, Hadrien Devillepoix1, Patrick Shober1, Benjamin Hartig1, Martin Cupak1, Trent Jansen- Sturgeon1, Robert Howie1, Gretchen Benedix1, Geoff Deacon5 1Space Science and Technology Center, Curtin University, GPO Box U1987, Perth, WA 6845, Australia 2Spectre UAV Concepts, 191 St Georges Terrace, Perth, WA 6000, Australia 3Amotus Pty Ltd, Level 25/71 Eagle St, Brisbane City, QLD 4000, Australia 4Department of Psychology, Clemson University, 418 Brackett Hall, Clemson, SC, 29634 5Western Australian Museum, 49 Kew St, Welshpool, WA 6106, Australia *Corresponding author: E-mail: [email protected]. Abstract We present a novel methodology for recovering meteorite falls observed and constrained by fireball networks, using drones and machine learning algorithms. This approach uses images of the local terrain for a given fall site to train an artificial neural network, designed to detect meteorite candidates. We have field tested our methodology to show a meteorite detection rate between 75-97%, while also providing an efficient mechanism to eliminate false-positives. Our tests at a number of locations within Western Australia also showcase the ability for this training scheme to generalize a model to learn localized terrain features. Our model-training approach was also able to correctly identify 3 meteorites in their native fall sites, that were found using traditional searching techniques. Our methodology will be used to recover meteorite falls in a wide range of locations within globe- spanning fireball networks. Introduction Fireballs and meteors have been observed since antiquity by Chinese, Korean, Babylonian and Roman astronomers (Bjorkman 1973), while meteorites and their unique metallurgical properties have also been known and used by various cultures around the world from Inuit tools (Rickard 1941) to an Egyptian ceremonial dagger (Comelli et al. -
Special Report
enjoy reading it, and that you learn something from it. I know I did. THE Oh, one more thing: When referring to specific comets, I’ve used their popular names (e.g., Halley’s Comet), rather than identifying them by FLINT RIVER their technical names. -Bill OBSERVER You’re trash. (Did he really say that?) NEWSLETTER OF THE FLINT Well…Yes, I did. I’ve always wanted to say it. RIVER ASTRONOMY CLUB But don’t worry, I’m trash too. All of us are. We’re products of a process that began when the An Affiliate of the Astronomical League Sun became a star 4-1/2 billion years ago. Along Summer, 2016 with everything else in the solar system, we’re debris left over when the Sun filled itself to * * * * * * * * * * * * * * * * * * * * * * * * * overflowing and blinked into existence. The solar system is a vast junkyard of leftover parts. The largest spare parts -- the planets -- are stable in their solar orbits. They are like big brothers and SPECIAL sisters in the solar family. Other, smaller parts such as comets and the dust they release as they approach the Sun are less stable, and they are at the mercy of REPORT anything larger that gets in their way. * * * * * * * * * * * * * * * * * * * * * * * * * Asteroids. Like everything else in the solar system, asteroids (a.k.a. minor planets) are space junk. Most of them are found in the asteroid belt, FIRE IN THE SKY: orbiting the Sun between Mars and Jupiter. Billions of asteroids inhabit the asteroid belt; they range in size from 600 miles in diameter (Ceres) to boulders, Everything You Could rocks and pebbles. -
Small Near-Earth Asteroids As a Source of Meteorites
Small Near-Earth Asteroids as a Source of Meteorites Jiří Borovička and Pavel Spurný Astronomical Institute of the Czech Academy of Sciences Peter Brown University of Western Ontario __________________________________________________________________________ Small asteroids intersecting Earth’s orbit can deliver extraterrestrial rocks to the Earth, called meteorites. This process is accompanied by a luminous phenomena in the atmosphere, called bolides or fireballs. Observations of bolides provide pre-atmospheric orbits of meteorites, physical and chemical properties of small asteroids, and the flux (i.e. frequency of impacts) of bodies at the Earth in the centimeter to decameter size range. In this chapter we explain the processes occurring during the penetration of cosmic bodies through the atmosphere and review the methods of bolide observations. We compile available data on the fireballs associated with 22 instrumentally observed meteorite falls. Among them are the heterogeneous falls Almahata Sitta (2008 TC3) and Benešov, which revolutionized our view on the structure and composition of small asteroids, the Příbram-Neuschwanstein orbital pair, carbonaceous chondrite meteorites with orbits on the asteroid-comet boundary, and the Chelyabinsk fall, which produced a damaging blast wave. While most meteoroids disrupt into fragments during atmospheric flight, the Carancas meteoroid remained nearly intact and caused a crater-forming explosion on the ground. 1. INTRODUCTION Well before the first asteroid was discovered, people unknowingly had asteroid samples in their hands. Could stones fall from the sky? For many centuries, the official answer was: NO. Only at the end of the 18th century and the beginning of the 19th century did the evidence that rocks did fall from the sky become so overwhelming that this fact was accepted by the scientific community. -
Black As Coal . Hard As Rock. Ordinary As a Chondrite
Meteorite-Times Magazine Contents by Editor Like Sign Up to see what your friends like. Featured Monthly Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Meteorite Market Trends by Michael Blood Bob’s Findings by Robert Verish IMCA Insights by The IMCA Team Micro Visions by John Kashuba Galactic Lore by Mike Gilmer Meteorite Calendar by Anne Black Meteorite of the Month by Michael Johnson Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2010 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner. -
Meteorite-Times 2010 1.Pdf
Meteorite-Times Magazine Contents by Editor Like Sign Up to see what your friends like. Featured Monthly Articles Accretion Desk by Martin Horejsi Jim’s Fragments by Jim Tobin Meteorite Market Trends by Michael Blood Bob’s Findings by Robert Verish IMCA Insights by The IMCA Team Micro Visions by John Kashuba Galactic Lore by Mike Gilmer Meteorite Calendar by Anne Black Meteorite of the Month by Michael Johnson Tektite of the Month by Editor Terms Of Use Materials contained in and linked to from this website do not necessarily reflect the views or opinions of The Meteorite Exchange, Inc., nor those of any person connected therewith. In no event shall The Meteorite Exchange, Inc. be responsible for, nor liable for, exposure to any such material in any form by any person or persons, whether written, graphic, audio or otherwise, presented on this or by any other website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. does not endorse, edit nor hold any copyright interest in any material found on any website, web page or other cyber location linked to from this website. The Meteorite Exchange, Inc. shall not be held liable for any misinformation by any author, dealer and or seller. In no event will The Meteorite Exchange, Inc. be liable for any damages, including any loss of profits, lost savings, or any other commercial damage, including but not limited to special, consequential, or other damages arising out of this service. © Copyright 2002–2010 The Meteorite Exchange, Inc. All rights reserved. No reproduction of copyrighted material is allowed by any means without prior written permission of the copyright owner.