2024
DOI: 10.3847/psj/ad0b07
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An Updated Shape Model of Dimorphos from DART Data

R. Terik Daly,
Carolyn M. Ernst,
Olivier S. Barnouin
et al.

Abstract: Dimorphos was the target of the Double Asteroid Redirection Test (DART) mission. This paper summarizes the properties of an updated shape model of Dimorphos, describes the differences between the updated shape model and an earlier version published by Daly, Ernst, Barnouin et al. (doi:10.1038/s41586-023-05810-5), summarizes the data products associated with this model, and explains where the products can be accessed. The updated shape model benefited from improved methods of incorporating limb information, whi… Show more

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Cited by 17 publications
(32 citation statements)
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“…The cohesive strength also factors into predicting the outcome of DARTʼs impact on Dimorphos' surface. For a set of simulations that suggest >10 Pa to tens of kPa, a crater with a diameter of ∼30-60 m is predicted (Stickle et al 2024), which is a sizable crater on Dimorphos, whose volumeequivalent diameter is only 150 m (Daly et al 2024). For models that suggest a strength < a few Pa, the simulations suggest that DARTʼs impact caused global deformation and reshaping of Dimorphos rather than a well-defined crater (Raducan et al 2024a).…”
Section: Dart's Kinetic Impact Eventmentioning
confidence: 96%
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“…The cohesive strength also factors into predicting the outcome of DARTʼs impact on Dimorphos' surface. For a set of simulations that suggest >10 Pa to tens of kPa, a crater with a diameter of ∼30-60 m is predicted (Stickle et al 2024), which is a sizable crater on Dimorphos, whose volumeequivalent diameter is only 150 m (Daly et al 2024). For models that suggest a strength < a few Pa, the simulations suggest that DARTʼs impact caused global deformation and reshaping of Dimorphos rather than a well-defined crater (Raducan et al 2024a).…”
Section: Dart's Kinetic Impact Eventmentioning
confidence: 96%
“…Given the high-quality and extensive post-impact photometric observations (Moskovitz et al 2024), the observations have been able to provide constraints on the post-impact axial dimensions of Dimorphos, through both dynamical modeling of the orbit (Naidu et al 2024) and by directly measuring the rotational lightcurve of Dimorphos in a subset of the observations (Pravec et al 2023). The estimated post-impact equatorial axis ratio of Dimorphos from modeling the orbit is 1.3 (Naidu et al 2024), differing significantly from the preimpact oblate shape with an equatorial axis ratio of 1.02 (Daly et al 2024). The Dimorphos rotational lightcurve is also suggestive of Dimorphos having different post-impact axial ratios (Pravec et al 2023), outside of the uncertainties associated with the axial ratios that were determined using the pre-impact DRACO images (Daly et al 2024).…”
Section: Dart's Kinetic Impact Eventmentioning
confidence: 99%
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