A5049829418- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Gamma-ray bursts and supernovae
- Geological and Geochemical Analysis
- Space Satellite Systems and Control
- Ionosphere and magnetosphere dynamics
- High-pressure geophysics and materials
- Analytical Chemistry and Sensors
- Meteorological Phenomena and Simulations
- Space Science and Extraterrestrial Life
- Astronomical Observations and Instrumentation
- Solar and Space Plasma Dynamics
- Fire Detection and Safety Systems
- earthquake and tectonic studies
- Nuclear Physics and Applications
- Atmospheric and Environmental Gas Dynamics
- Earthquake Detection and Analysis
- Modular Robots and Swarm Intelligence
- Geological Modeling and Analysis
- Fire effects on ecosystems
Curtin University
2018-2022
The Earth is impacted by 35–40 metre-scale objects every year. These meteoroids are the low-mass end of impactors that can do damage on ground. Despite this they very poorly surveyed and characterized, too infrequent for ground-based fireball observation efforts, small to be efficiently detected NEO telescopic surveys whilst still in interplanetary space. We want evaluate suitability different instruments characterizing where come from. use data collected over first 3 yr operation...
Abstract As fireball networks grow, the number of events observed becomes unfeasible to manage by manual efforts. Reducing and analyzing big data requires automated pipelines. Triangulation a trajectory can swiftly provide information on positions and, with timing information, velocities. However, extending this pipeline determine terminal mass estimate meteoroid is complex next step. Established methods typically require assumptions be made physical characteristics (such as shape bulk...
We describe the fall of Dingle Dell (L/LL 5) meteorite near Morawa in Western Australia on October 31, 2016. The fireball was observed by six observatories Desert Fireball Network (DFN), a continental scale facility optimised to recover meteorites and calculate their pre-entry orbits. $30\,\mbox{cm}$ meteoroid entered at 15.44 $\mbox{km s}^{-1}$, followed moderately steep trajectory $51^{\circ}$ horizon from 81 km down 19 altitude, where luminous flight ended speed 3.2 s}^{-1}$. Deceleration...
Abstract On June 19, 2020 at 20:05:07 UTC, a fireball lasting was observed above Western Australia by three Desert Fireball Network observatories. The meteoroid entered the atmosphere with speed of km and followed ° slope trajectory from height 75 down to 18.6 km. Despite poor angle triangulated planes between observatories (29°) large distance observatories, well‐constrained kilo‐size main mass predicted have fallen just south Madura in Australia. However, search area be due uncertainties....
Fireball networks establish the trajectories of meteoritic material passing through Earth's atmosphere, from which they can derive pre-entry orbits. Triangulated atmospheric trajectory data requires different orbit determination methods to those applied observational beyond sphere-of-influence, such as telescopic observations asteroids. Currently, vast majority fireball determine and publish orbital using an analytical approach, with little flexibility include perturbations. Here we present...
Abstract For centuries extremely long grazing fireball displays have fascinated observers and inspired people to ponder about their origins. The Desert Fireball Network is the largest single network in world, covering one third of Australian skies. This expansive size has enabled us capture a majority atmospheric trajectory spectacular event that lasted over 90 s, penetrated as deep ∼58.5 km, traveled 1300 km through atmosphere before exiting back into interplanetary space. Based on our...
Abstract Fireball networks are used to recover meteorites, with the context of orbits. Observations from these cover bright flight, where meteoroid is luminescent, but a fallen meteorite, observations must often be predicted forward in time ground estimate an impact position. This dark-flight modeling deceptively simple, there hidden complexity covering precise interactions between meteorite and (usually active) atmosphere. We describe method approach by Desert Network, detailing issues we...
Abstract Objects gravitationally captured by the Earth–Moon system are commonly called temporarily orbiters (TCOs), natural Earth satellites, or minimoons. TCOs a crucially important subpopulation of near-Earth objects (NEOs) to understand because they easiest targets for future sample-return, redirection, asteroid mining missions. Only one TCO has ever been observed telescopically, 2006 RH 120 , and it orbited about 11 months. Additionally, only fireball prior this study. We present our...
Abstract The Desert Fireball Network observed a significant outburst of fireballs belonging to the Southern Taurid Complex meteor showers between 2015 October 27 and November 17. At same time, Cameras for Allsky Meteor Surveillance project detected distinct population smaller meteors irregular IAU shower #628, s-Taurids. While this returning was predicted in previous work, reason stream is not yet understood. first year that precisely observed, providing an opportunity better understand its...
Abstract Meteorites with known orbital origins are key to our understanding of solar system formation and the source life on Earth. Fireball networks have been developed globally in a unified effort record ultimately retrieve these cosmic samples. However, accuracy determined orbit likelihood meteorite recovery depend directly chosen meteoroid triangulation method. There three leading techniques for discussed literature: method planes, straight-line least-squares method, multiparameter fit...
We present a novel methodology for recovering meteorite falls observed and constrained by fireball networks, using drones machine learning algorithms. This approach uses images of the local terrain given fall site to train an artificial neural network, designed detect candidates. have field tested our show detection rate between 75-97%, while also providing efficient mechanism eliminate false-positives. Our tests at number locations within Western Australia showcase ability this training...
Based on telescopic observations of Jupiter-family comets (JFCs), there is predicted to be a paucity objects at sub-kilometre sizes. However, several bright fireballs and some meteorites have been tenuously linked the JFC population, showing metre-scale do exist in this region. In 2017, Desert Fireball Network (DFN) observed grazing fireball that redirected meteoroid from an Apollo-type orbit JFC-like orbit. Using orbital data collected by DFN, study, we generated artificial dataset close...
Abstract On November 27, 2015, at 10:43:45.526 UTC, a fireball was observed across South Australia by 10 Desert Fireball Network observatories lasting 6.1 s. An ~37 kg meteoroid entered the atmosphere with speed of 13.68 ± 0.09 km s −1 and ablating from height 85 down to 18 km, having slowed 3.28 0.21 . Despite relatively steep 68.5° trajectory, strong atmospheric winds significantly influenced darkflight phase predicted fall line, but analysis put site in center Kati Thanda–Lake Eyre South....
Abstract Murrili, the third meteorite recovered by Desert Fireball Network, is analyzed using mineralogy, oxygen isotopes, bulk chemistry, physical properties, noble gases, and cosmogenic radionuclides. The modal magnetic susceptibility, isotopes of Murrili point to it being an H5 ordinary chondrite. It heterogeneously shocked (S2–S5), depending on method used determine it, although not obviously brecciated in texture. Cosmogenic radionuclides yield a cosmic ray exposure age 6–8 Ma,...
The Desert Fireball Network observed a significant outburst of fireballs belonging to the Southern Taurid Complex meteor showers between October 27 and November 17, 2015. At same time, Cameras for Allsky Meteor Surveillance project detected distinct population smaller meteors irregular IAU shower #628, s-Taurids. While this returning was predicted in previous work, reason stream is not yet understood. 2015 first year that precisely observed, providing an opportunity better understand its...