• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2-2019 QR6

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    stab3719.pdf
    Size:
    2.182Mb
    Format:
    PDF
    Description:
    Final Published Version
    Download
    Author
    Fatka, P.
    Moskovitz, N.A.
    Pravec, P.
    Micheli, M.
    Devogèle, M.
    Gustafsson, A.
    Kueny, J.
    Skiff, B.
    Kušnirák, P.
    Christensen, E.
    Ries, J.
    Brucker, M.
    Mcmillan, R.
    Larsen, J.
    Mastaler, R.
    Bressi, T.
    Show allShow less
    Affiliation
    Wyant College of Optical Sciences, University of Arizona
    The University of Arizona, Lunar and Planetary Laboratory
    Issue Date
    2022
    Keywords
    Celestial mechanics
    Minor planets, asteroids: Individual
    
    Metadata
    Show full item record
    Publisher
    Oxford University Press
    Citation
    Fatka, P., Moskovitz, N. A., Pravec, P., Micheli, M., Devogèle, M., Gustafsson, A., Kueny, J., Skiff, B., Kušnirák, P., Christensen, E., Ries, J., Brucker, M., Mcmillan, R., Larsen, J., Mastaler, R., & Bressi, T. (2022). Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2-2019 QR6. Monthly Notices of the Royal Astronomical Society.
    Journal
    Monthly Notices of the Royal Astronomical Society
    Rights
    Copyright © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Asteroid pairs are genetically related asteroids that recently separated (<few million years), but still reside on similar heliocentric orbits. A few hundred of these systems have been identified, primarily in the asteroid main belt. Here, we studied a newly discovered pair of near-Earth objects (NEOs): 2019 PR2 and 2019 QR6. Based on broad-band photometry, we found these asteroids to be spectrally similar to D-types, a type rare amongst NEOs. We recovered astrometric observations for both asteroids from the Catalina Sky Survey from 2005, which significantly improved their fitted orbits. With these refinements we ran backwards orbital integrations to study formation and evolutionary history. We found that neither a pure gravitational model nor a model with the Yarkovsky effect could explain their current orbits. We thus implemented two models of comet-like non-gravitational forces based on water or CO sublimation. The first model assumed quasi-continuous, comet-like activity after separation, which suggested a formation time of the asteroid pair $300^{+120}_{-70}$ yr ago. The second model assumed short-term activity for up to one heliocentric orbit (∼13.9 yr) after separation, which suggested that the pair formed 272 ± 7 yr ago. Image stacks showed no activity for 2019 PR2 during its last perihelion passage. These results strongly argue for a common origin that makes these objects the youngest asteroid pair known to date. Questions remain regarding whether these objects derived from a parent comet or asteroid, and how activity may have evolved since their separation. © 2021 The Author(s).
    Note
    Immediate access
    ISSN
    0035-8711
    DOI
    10.1093/mnras/stab3719
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1093/mnras/stab3719
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.