The geology and evolution of the Near-Earth binary asteroid system (65803) Didymos.

Journal

Nature communications

ISSN: 2041-1723

Titre abrégé: Nat Commun

Pays: England

ID NLM: 101528555

Informations de publication

Date de publication:
30 Jul 2024

Historique:

received: 29 09 2023

accepted: 06 04 2024

medline: 31 7 2024

pubmed: 31 7 2024

entrez: 30 7 2024

Statut: epublish

Résumé

Images collected during NASA's Double Asteroid Redirection Test (DART) mission provide the first resolved views of the Didymos binary asteroid system. These images reveal that the primary asteroid, Didymos, is flattened and has plausible undulations along its equatorial perimeter. At high elevations, its surface is rough and contains large boulders and craters; at low elevations its surface is smooth and possesses fewer large boulders and craters. Didymos' moon, Dimorphos, possesses an intimate mixture of boulders, several asteroid-wide lineaments, and a handful of craters. The surfaces of both asteroids include boulders that are large relative to their host body, suggesting that both asteroids are rubble piles. Based on these observations, our models indicate that Didymos has a surface cohesion ≤ 1 Pa and an interior cohesion of ∼10 Pa, while Dimorphos has a surface cohesion of <0.9 Pa. Crater size-frequency analyzes indicate the surface age of Didymos is 40-130 times older than Dimorphos, with likely absolute ages of

Identifiants

DOI: 10.1038/s41467-024-50146-x PMID: 39080262

pubmed: 39080262

doi: 10.1038/s41467-024-50146-x

pii: 10.1038/s41467-024-50146-x

doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

Pagination

6202

Subventions

Organisme : National Aeronautics and Space Administration (NASA)

ID : 80MSFC20D0004

Organisme : Agenzia Spaziale Italiana (Italian Space Agency)

ID : n. 2019-31-HH.0

Organisme : European Commission (EC)

ID : No 870377

Informations de copyright

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