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1. Identity statement Reference Type Conference Paper (Conference Proceedings) Site mtc-m21b.sid.inpe.br Holder Code isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S Identifier 8JMKD3MGP3W34P/3P775SB Repository sid.inpe.br/mtc-m21b/2017/06.29.13.00 Metadata Repository sid.inpe.br/mtc-m21b/2017/06.29.13.00.30 Metadata Last Update 2018:06.04.02.27.32 (UTC) administrator Secondary Key INPE--PRE/ Citation Key WinterAraúMaca:2017:ClNETh Title Classification of NEAs through dynamical evolution Year 2017 Access Date 2024, May 19 Secondary Type PRE CI 2. Context Author 1 Winter, O. C. 2 Araújo, R. A. N. 3 Macau, Elbert Einstein Nehrer Resume Identifier 1 2 3 8JMKD3MGP5W/3C9JGUT Group 1 2 3 LABAC-COCTE-INPE-MCTIC-GOV-BR Affiliation 1 Universidade Estadual Paulista (UNESP) 2 Universidade Estadual Paulista (UNESP) 3 Instituto Nacional de Pesquisas Espaciais (INPE) Author e-Mail Address 1 ocwinter@gmail.com 2 3 elbert.macau@inpe.br Conference Name Asteroids, Comets, Meteors Conference Location Montevideo, Uruguay Date 10-14 Apr. History (UTC) 2017-06-29 13:00:43 :: simone -> administrator :: 2017 2018-06-04 02:27:32 :: administrator -> simone :: 2017 3. Content and structure Is the master or a copy? is the master Content Stage completed Transferable 1 Content Type External Contribution Abstract Introduction: The near Earth asteroids (NEAs) are usually classified according to their orbital characteristics into four groups: Aten, Apollo, Amor and Atira. An Aten has a semi-major axis of less than 1 au and aphelion distance greater than the Earth's perihelion distance. An Amor has perihelion distance greater than the Earth's aphelion distance and aphelion smaller than 1.3 au. An Apollo has semi-major axis of more than 1 au and perihelion distance smaller than the Earth's aphelion distance. An Atira has aphelion distance smaller than Earth's perihelion distance. However, this is a static classification, based on their current osculating orbital elements. The NEAs live in a region highly perturbed by the terrestrial planets. In general, their lifetime is of the order of 10 Myrs. Most of them cross the border from one group to another during their lifetime, that means they temporarily belong to a given group. So, the question is how would they be classified according to their dynamical orbital evolution? Approach: In the present work is studied the temporal orbital evolution of the NEAs. There were performed numerical simulations of a representative sample of NEAs under the gravitational influence of all planets and the Sun. Their dynamics is dominated by the gravitational interactions with the terrestrial planets. A single close encounter with one of this planets can move an asteroid from one group to another. We pay special attention to their mobility as a function of their initial location in the semi-major axis versus eccentricity plane (a x e), and consequently in their transition between the groups. Results: A general view of the results can be seen in Figure 1. T The coded color indicates the states, i.e, to how many groups a NEA belonged to along its lifetime. A representative example is the following. We found two Apollo asteroids with very distinct dynamical behaviors. One of them explores a wide region of the space covering all the groups (from the inner Atira up to the outer Asteroid Main Belt) (Figure 2), while the other asteroid remains its entire lifetime in a narrow region, jumping from Apollo to Atens and vice-versa. The results reveal some sort of patterns to be used in a new classification of the NEAs in terms of dynamical orbital evolution. Area COMP Arrangement urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABAC > Classification of NEAs... doc Directory Content there are no files source Directory Content there are no files agreement Directory Content agreement.html 29/06/2017 10:00 1.0 KiB  4. Conditions of access and use Language en User Group simone Reader Group administrator simone Visibility shown Read Permission allow from all Update Permission not transferred 5. Allied materials Next Higher Units 8JMKD3MGPCW/3ESGTTP Citing Item List 2 Host Collection sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 6. Notes Empty Fields archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label lineage mark mirrorrepository nextedition notes numberoffiles numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume 7. Description control e-Mail (login) simone update

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