The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes.
Journal
Science (New York, N.Y.)
ISSN: 1095-9203
Titre abrégé: Science
Pays: United States
ID NLM: 0404511
Informations de publication
Date de publication:
19 04 2019
19 04 2019
Historique:
received:
13
11
2018
accepted:
12
03
2019
pubmed:
21
3
2019
medline:
21
3
2019
entrez:
21
3
2019
Statut:
ppublish
Résumé
The near-Earth carbonaceous asteroid 162173 Ryugu is thought to have been produced from a parent body that contained water ice and organic molecules. The Hayabusa2 spacecraft has obtained global multicolor images of Ryugu. Geomorphological features present include a circum-equatorial ridge, east-west dichotomy, high boulder abundances across the entire surface, and impact craters. Age estimates from the craters indicate a resurfacing age of [Formula: see text] years for the top 1-meter layer. Ryugu is among the darkest known bodies in the Solar System. The high abundance and spectral properties of boulders are consistent with moderately dehydrated materials, analogous to thermally metamorphosed meteorites found on Earth. The general uniformity in color across Ryugu's surface supports partial dehydration due to internal heating of the asteroid's parent body.
Identifiants
pubmed: 30890587
pii: science.aaw0422
doi: 10.1126/science.aaw0422
pmc: PMC7370239
mid: NIHMS1531029
doi:
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't
Langues
eng
Pagination
252Subventions
Organisme : Exploration Systems NASA
Pays : United States
Organisme : Science Earth Science System NASA
Pays : United States
Commentaires et corrections
Type : CommentIn
Informations de copyright
Copyright © 2019, American Association for the Advancement of Science.
Références
Nature. 2014 Apr 10;508(7495):233-6
pubmed: 24695219
Science. 2001 Apr 20;292(5516):484-8
pubmed: 11313490
Science. 2006 Jun 2;312(5778):1347-9
pubmed: 16741112
Science. 2019 Apr 19;364(6437):268-272
pubmed: 30890588
Science. 2007 May 18;316(5827):1011-4
pubmed: 17446355
Nature. 2001 Sep 27;413(6854):394-6
pubmed: 11574880
Sci Rep. 2015 Nov 02;5:16029
pubmed: 26522880
Science. 2019 Apr 19;364(6437):272-275
pubmed: 30890589