Twitter thread index of DART mission
Crater Size Predictions of Asteroid Dimorphos
Pre-impact papers :
See only Angela Stickle's papers
See only Sabina Raducan papers
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By - Sabina Raducan & Martin Jutzi, June 2022
Summary -
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Title - Reshaping and ejection processes on rubble-pile asteroids by impacts
By - Sabina Raducan et al, Sept 2022
Summary -
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By - Angela Stickle et al, Sept 2022
Summary -
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Title - Predicting asteroid material properties from a DART-like kinetic impact
By - Kathryn Kumamoto et al, Sept 2022
Summary -
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Title - Spacecraft Geometry Effects on Kinetic Impactor Missions
By - Michael Owen et al, Sept 2022 (Sabina Raducan)
Summary -
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By - Patrick Michel et al, July 2022 (Sabina Raducan, Yun Zhang, Angela Stickle)
Summary -
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By - SD Raducan et al, 2020
Summary -
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Title - The Double Asteroid Redirection Test (DART): Planetary Defense Investigations and Requirements
By - Andrew Rivkin et al, 2021
Summary -
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Title - Dynamical Evolution of Ejecta from the DART Impact on Dimorphos
By - Alessandro Rossi et al, May 2022
Summary -
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Title - Model of Double Asteroid Redirection Test Impact Ejecta Plume Observations
By - Andrew Cheng et al, June 2022 (SD Raducan, Angela Stickle)
Summary -
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By - Andrew Cheng et al, 2018 (Angela Stickle)
Summary -
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Title - The shape and structure of small asteroids as a result of sub-catastrophic collisions
By - Martin Jutzi, 2019
Summary -
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By - Robert Luther et al, Oct 2022 (SD Raducan)
Summary -
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By - Fabio Ferrari et al, July 2022 (SD Raducan, Martin Jutzi)
Summary -
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By - Masatoshi Hirabayashi et al, Jun 2022 (Fabio Ferrari, Martin Jutzi, SD Raducan)
Summary -
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By - Thomas Statler et al, Oct 2022
Summary - The essence of kinetic impact is not merely that the impactor spacecraft deposits its own momentum on the target, but that the kinetic energy liberated in the hypervelocity collision excavates and ejects a large amount of material, the recoil impulse from which can exceed the directly delivered momentum, greatly enhancing the effect of the deflection.
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By - Harrison Agrusa et al, July 2022
Summary -
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Title - Pre-encounter Predictions of DART Impact Ejecta Behavior and Observability
By - Eugene Fahnestock et al, Sept 2022
Summary -
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By - James Walker et al, Sept 2022 (about physical experiments)
Extracts - "larger size of the DART spacecraft compared to our 3.0 cm diameter impactor should increase β while the likely higher porosity of Dimorphos compared to our target will reduce β."
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By - Ryota Nakano et al, July 2022
Summary -
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By - Marshall Eubanks, 2017
Summary -
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Title - Predictions for the Dynamical States of the Didymos System before and after the Planned DART Impact
By - Derek Richardson et al, July 2022
Extracts - "The value of β resulting from the DART impact is expected to lie in the range from 1 to 5, based on impact modeling (Stickle et al. 2022)"
"In addition, the post-impact orbital period will fluctuate by anywhere on the order of tens of seconds to several minutes, on timescales ranging from a few days to months ..."
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Video Title - 21st Meeting of the NASA Small Bodies Assessment Group
By - Patrick Michel, 2019 YouTube video (Hera Investigation Team PI)
Summary - 8:48, crater morphology won't change over 3-4 years
Links - PDF Slides
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By - Harrison Agrusa et al, Aug 2022
Summary -
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Title - Boulder exhumation and segregation by impacts on rubble-pile asteroids
By - Ormo et al, Sept 2022 (SD Raducan, Martin Jutzi)
Summary -
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Title - The role of asteroid strength, porosity and internal friction in impact momentum transfer
By - SD Raducan et al, 2019 (Davison, Collins, Luther)
Summary -
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Title - The role of asteroid strength and porosity in impact momentum transfer
By - SD Raducan et al, 2017 (Davison, Collins)
Summary - For a porosity of 20%, which is the current best estimate for the Didymos system, crater radii ranged from 6m to 15m (crater diameter : 12 m to 30 m). While these are somewhat larger than previous estimates of crater size for the DART impact, that assumed higher target strengths, they lie between ... which appear to be the most appropriate analogs for porous rocky asteroid surfaces.
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Title - Ejecta distribution and momentum transfer from oblique impacts on asteroid surfaces
By - SD Raducan et al, March 2022 (Davison, Collins)
Summary -
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Title - A hybrid SPH-SSDEM framework for end-to-end impact cratering modeling
By - Yun Zhang et al, March 2021
Summary - Matching simulations to Ryugu impact cratering
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Title - Impact cratering on small asteroids: Expectations and opportunities for AIM
By - GS Collins et al, 2016
Summary - The paper is one of many, inside the pdf. Search by name.
See only Sabina Raducan papers
Post-impact papers :
P1. ----------------------------
Title - Ejecta from the DART-produced active asteroid Dimorphos
By - Jian-Yang Li et al, Nov 2022
Summary - This paper shares observations of the impact ejecta with the Hubble Space Telescope from impact time (T)+15 minutes to T+18.5 days. The dust ejected at speeds much higher than the escape speed of the binary system (0.25 m/s) is directly ejected out of the system. The dust ... displayed signatures of gravitational interaction with the binary asteroid system, forming spirals and extended features. Slow ejecta is ultimately pushed in the antisolar direction (nearly opposite the impact direction) by solar radiation pressure to form a tail. The possible mechanisms of the secondary dust emission could include the re-impact of ejecta blocks onto Dimorphos or Didymos, or large ejecta blocks disintegrating into small pieces due to spin up or mutual collisions.
P2. ----------------------------
Title - Momentum Transfer from the DART Mission Kinetic Impact on Asteroid Dimorphos
By - Andrew Cheng et al, March 2023
Summary - DART impact slowed down Dimorphos by 2.7 mm/s, indicating that the recoil from the ejecta amplified the momentum change by a factor of 2.2 to 4.9 (depending on the mass of Dimorphos). If Dimorphos and Didymos are assumed to have equal densities of 2,400 kg/m^3, then β=3.61. Bulk density for Dimorphos varies from 1,500 to 3,300 kg/m^3.
News - JHUAPL Press Release
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Title - Morphology and spectral properties of the DART impact ejecta with VLT/MUSE
By - Opitom et al, 2023
Summary - Dimorphos seems to be a dry asteroid - no water or oxygen detected in the spectra of ejecta. There was also no evidence of traces of the hydrazine fuel that was on board DART, nor the xenon from its ion engine, although given their small quantities the non-detection is not a surprise.
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Title - Optical spectropolarimetry of binary asteroid Didymos-Dimorphos before and after the DART impact
By - Stefano Bagnulo et al, 2023
Summary - .
News - ESO
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Title - Light Curves and Colors of the Ejecta from Dimorphos after the DART Impact
By - Ariel Graykowski et al, 2023
Summary - .
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Title - Ejecta from the DART-produced active asteroid Dimorphos
By - Jian-Yang Li et al, 2023
Summary - .
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Title - Orbital Period Change of Dimorphos Due to the DART Kinetic Impact
By - Cristina Thomas et al, 2023
Summary - .
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Title - ALMA Observations of the DART Impact: Characterizing the Ejecta at Sub-Millimeter Wavelengths
By - Nathan Roth et al, 2023
Summary - .
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Title - The Dimorphos Boulder Swarm
By - David Jewitt et al, July 2023
Summary - .
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