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

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dc.contributor.author Fedorets, Grigori
dc.contributor.author Micheli, Marco
dc.contributor.author Jedicke, Robert
dc.contributor.author Naidu, Shantanu P.
dc.contributor.author Farnocchia, Davide
dc.contributor.author Granvik, Mikael
dc.contributor.author Moskovitz, Nicholas
dc.contributor.author Schwamb, Megan E.
dc.contributor.author Weryk, Robert
dc.contributor.author Wierzchos, Kacper
dc.contributor.author Christensen, Eric
dc.contributor.author Pruyne, Theodore
dc.contributor.author Bottke, William F.
dc.contributor.author Ye, Quanzhi
dc.contributor.author Wainscoat, Richard
dc.contributor.author Devogele, Maxime
dc.contributor.author Buchanan, Laura E.
dc.contributor.author Djupvik, Anlaug Amanda
dc.contributor.author Faes, Daniel M.
dc.contributor.author Fohring, Dora
dc.contributor.author Roediger, Joel
dc.contributor.author Seccull, Tom
dc.contributor.author Smith, Adam B.
dc.date.accessioned 2021-11-22T22:46:53Z
dc.date.available 2021-12-18T03:45:48Z
dc.date.issued 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 . https://doi.org/10.3847/1538-3881/abc3bc
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.identifier.uri http://hdl.handle.net/10138/336600
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 RADIATION PRESSURE
dc.subject PHASE FUNCTION
dc.subject DISTRIBUTIONS
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.doi https://doi.org/10.3847/1538-3881/abc3bc
dc.relation.issn 0004-6256
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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