An Updated Shape Model of Dimorphos from DART Data

0582761 - ASÚ 2025 RIV US eng J - Journal Article
Daly, R. T. - Ernst, C. M. - Barnouin, O. S. - Pravec, Petr … Total 19 authors
An Updated Shape Model of Dimorphos from DART Data.
The Planetary Science Journal. Roč. 5, č. 1 (2024), č. článku 24. E-ISSN 2632-3338
R&D Projects: GA ČR(CZ) GA20-04431S
Institutional support: RVO:67985815
Keywords : asteroid surfaces * near-Earth objects * asteroid satellites
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 3.4, year: 2022
Method of publishing: Open access

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, which will accelerate future shape modeling efforts for other objects with limited imaging data. The updated shape model is similar to the earlier model but slightly smaller (-2.8% change in volume) than the previous Dimorphos global shape model, and the updated shape is slightly more elongated. The additional analysis reported here supports an oblate preimpact shape for Dimorphos. This result indicates that the postimpact elongation of Dimorphos derived from ground-based observations is evidence for a large crater or global reshaping of the asteroid due to the DART impact. The updated global shape model of Dimorphos, as well as the earlier version, will be available in the Planetary Data System Small Bodies Node and through the public Small Body Mapping Tool.
Permanent Link: https://hdl.handle.net/11104/0353174