Establishing Earth's Minimoon Population through Characterization of Asteroid 2020 CD3

Show simple item record Fedorets, Grigori Micheli, Marco Jedicke, Robert Naidu, Shantanu P. Farnocchia, Davide Granvik, Mikael Moskovitz, Nicholas Schwamb, Megan E. Weryk, Robert Wierzchos, Kacper Christensen, Eric Pruyne, Theodore Bottke, William F. Ye, Quanzhi Wainscoat, Richard Devogele, Maxime Buchanan, Laura E. Djupvik, Anlaug Amanda Faes, Daniel M. Fohring, Dora Roediger, Joel Seccull, Tom Smith, Adam B. 2021-11-22T22:46:53Z 2021-12-18T03:45:48Z 2020-12
dc.identifier.citation Fedorets , G , Micheli , M , Jedicke , R , Naidu , S P , Farnocchia , D , Granvik , M , Moskovitz , N , Schwamb , M E , Weryk , R , Wierzchos , K , Christensen , E , Pruyne , T , Bottke , W F , Ye , Q , Wainscoat , R , Devogele , M , Buchanan , L E , Djupvik , A A , Faes , D M , Fohring , D , Roediger , J , Seccull , T & Smith , A B 2020 , ' Establishing Earth's Minimoon Population through Characterization of Asteroid 2020 CD3 ' , Astronomical Journal , vol. 160 , no. 6 , 277 .
dc.identifier.other PURE: 157189841
dc.identifier.other PURE UUID: dd4ba2e9-1e25-47c9-873d-7d681f12267f
dc.identifier.other WOS: 000591796900001
dc.identifier.other ORCID: /0000-0002-5624-1888/work/85118049
dc.description.abstract We report on our detailed characterization of Earth's second known temporary natural satellite, or minimoon, asteroid 2020 CD3. An artificial origin can be ruled out based on its area-to-mass ratio and broadband photometry, which suggest that it is a silicate asteroid belonging to the S or V complex in asteroid taxonomy. The discovery of 2020 CD3 allows for the first time a comparison between known minimoons and theoretical models of their expected physical and dynamical properties. The estimated diameter of 1.2(-0.2)(+0.4) m and geocentric capture approximately a decade after the first known minimoon, 2006.RH120, are in agreement with theoretical predictions. The capture duration of 2020 CD3 of at least 2.7 yr is unexpectedly long compared to the simulation average, but it is in agreement with simulated minimoons that have close lunar encounters, providing additional support for the orbital models. 2020 CD3's atypical rotation period, significantly longer than theoretical predictions, suggests that our understanding of meter-scale asteroids needs revision. More discoveries and a detailed characterization of the population can be expected with the forthcoming Vera C. Rubin Observatory Legacy Survey of Space and Time. en
dc.format.extent 14
dc.language.iso eng
dc.relation.ispartof Astronomical Journal
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Near-Earth objects
dc.subject Asteroids
dc.subject Transient sources
dc.subject Astrometry
dc.subject Broad band photometry
dc.subject Earth-moon system
dc.subject Light curves
dc.subject Orbit determination
dc.subject ORBIT
dc.subject SATELLITES
dc.subject FRAGMENTS
dc.subject PLANETS
dc.subject DENSITY
dc.subject OBJECTS
dc.subject TARGET
dc.subject 115 Astronomy, Space science
dc.title Establishing Earth's Minimoon Population through Characterization of Asteroid 2020 CD3 en
dc.type Article
dc.contributor.organization Department of Physics
dc.contributor.organization Planetary-system research
dc.contributor.organization Particle Physics and Astrophysics
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0004-6256
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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