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dc.contributor.authorAgarwal, J.
dc.contributor.authorKim, Y.
dc.contributor.authorJewitt, D.
dc.contributor.authorMutchler, M.
dc.contributor.authorWeaver, H.
dc.contributor.authorLarson, S.
dc.date.accessioned2021-05-08T00:13:00Z
dc.date.available2021-05-08T00:13:00Z
dc.date.issued2020-11-19
dc.identifier.citationAgarwal, J., Kim, Y., Jewitt, D., Mutchler, M., Weaver, H., & Larson, S. (2020). Component properties and mutual orbit of binary main-belt comet 288P/(300163) 2006 VW139. Astronomy & Astrophysics, 643, A152.en_US
dc.identifier.issn0004-6361
dc.identifier.doi10.1051/0004-6361/202038195
dc.identifier.urihttp://hdl.handle.net/10150/658226
dc.description.abstractThe binary asteroid 288P/(300163) is unusual both for its combination of wide-separation and high mass ratio and for its comet-like activity. It is not currently known whether there is a causal connection between the activity and the unusual orbit or if instead the activity helped to overcome a strong detection bias against such sub-arcsecond systems. Aims. We aim to find observational constraints discriminating between possible formation scenarios and to characterise the physical properties of the system components. Methods. We measured the component separation and brightness using point spread function fitting to high-resolution Hubble Space Telescope/Wide Field Camera 3 images from 25 epochs between 2011 and 2020.We constrained component sizes and shapes from the photometry, and we fitted a Keplerian orbit to the separation as a function of time. Results. Approximating the components A and B as prolate spheroids with semi-axis lengths a < b and assuming a geometric albedo of 0.07, we find aA 0.6 km, bA 1.4 km, aB 0.5 km, and bB 0.8 km.We find indications that the dust production may have concentrated around B and that the mutual orbital period may have changed by 1-2 days during the 2016 perihelion passage. Orbit solutions have semi-major axes in the range of (105-109) km, eccentricities between 0.41 and 0.51, and periods of (117.3-117.5) days preperihelion and (118.5-119.5) days post-perihelion, corresponding to system masses in the range of (6.67-7.23) 1012 kg. The mutual and heliocentric orbit planes are roughly aligned. Conclusions. Based on the orbit alignment, we infer that spin-up of the precursor by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect led to the formation of the binary system. We disfavour (but cannot exclude) a scenario of very recent formation where activity was directly triggered by the break-up, because our data support a scenario with a single active component. © J. Agarwal et al. 2020.en_US
dc.description.sponsorshipH2020 European Research Councilen_US
dc.language.isoenen_US
dc.publisherEDP Sciencesen_US
dc.rights© J. Agarwal et al. 2020. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0).en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subjectMinor planets, asteroids: individual: 288P/(300163)en_US
dc.titleComponent properties and mutual orbit of binary main-belt comet 288P/(300163) 2006 VW139en_US
dc.typeArticleen_US
dc.identifier.eissn1432-0746
dc.contributor.departmentLunar and Planetary Laboratory, University of Arizonaen_US
dc.identifier.journalAstronomy and Astrophysicsen_US
dc.description.noteOpen access articleen_US
dc.description.collectioninformationThis 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.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleAstronomy & Astrophysics
dc.source.volume643
dc.source.beginpageA152
refterms.dateFOA2021-05-08T00:13:00Z


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© J. Agarwal et al. 2020. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0).
Except where otherwise noted, this item's license is described as © J. Agarwal et al. 2020. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0).