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Binary asteroid population. 3. Secondary rotations and elongations

Pravec, P. and Scheirich, P. and Kušnirák, P. and Hornoch, K. and Galád, A. and Naidu, S.P. and Pray, D.P. and Világi, J. and Gajdoš, Š. and Kornoš, L. and Krugly, Yu.N. and Cooney, W.R. and Gross, J. and Terrell, D. and Gaftonyuk, N. and Pollock, J. and Husárik, M. and Chiorny, V. and Stephens, R.D. and Durkee, R. and Reddy, V. and Dyvig, R. and Vraštil, J. and Žižka, J. and Mottola, S. and Hellmich, S. and Oey, J. and Benishek, V. and Kryszczyńska, A. and Higgins, D. and Ries, J. and Marchis, F. and Baek, M. and Macomber, B. and Inasaridze, R. and Kvaratskhelia, O. and Ayvazian, V. and Rumyantsev, V. and Masi, G. and Colas, F. and Lecacheux, J. and Montaigut, R. and Leroy, A. and Brown, P. and Krzeminski, Z. and Molotov, I. and Reichart, D. and Haislip, J. and LaCluyze, A. (2016) Binary asteroid population. 3. Secondary rotations and elongations. Icarus, 267, 267 - 295. Elsevier. DOI: 10.1016/j.icarus.2015.12.019 ISSN 0019-1035

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Official URL: http://www.sciencedirect.com/science/article/pii/S0019103515005722

Abstract

Abstract We collected data on rotations and elongations of 46 secondaries of binary and triple systems among near-Earth, Mars-crossing and small main belt asteroids. 24 were found or are strongly suspected to be synchronous (in 1:1 spin–orbit resonance), and the other 22, generally on more distant and/or eccentric orbits, were found or are suggested to have asynchronous rotations. For 18 of the synchronous secondaries, we constrained their librational angles, finding that their long axes pointed to within 20° of the primary on most epochs. The observed anti-correlation of secondary synchroneity with orbital eccentricity and the limited librational angles agree with the theories by Ćuk and Nesvorný (Ćuk, M., Nesvorný, D. 2010. Icarus 207, 732–743) and Naidu and Margot (Naidu, S.P., Margot, J.-L. 2015. Astron. J. 149, 80). A reason for the asynchronous secondaries being on wider orbits than synchronous ones may be longer tidal circularization time scales at larger semi-major axes. The asynchronous secondaries show relatively fast spins; their rotation periods are typically < 10 h. An intriguing observation is a paucity of chaotic secondary rotations; with an exception of (35107) 1991 VH, the secondary rotations are single-periodic with no signs of chaotic rotation and their periods are constant on timescales from weeks to years. The secondary equatorial elongations show an upper limit of a 2 / b 2 ∼ 1.5 . The lack of synchronous secondaries with greater elongations appears consistent, considering uncertainties of the axis ratio estimates, with the theory by Ćuk and Nesvorný that predicts large regions of chaotic rotation in the phase space for a 2 / b 2 ≳ 2 . Alternatively, secondaries may not form or stay very elongated in gravitational (tidal) field of the primary. It could be due to the secondary fission mechanism suggested by Jacobson and Scheeres (Jacobson, S.A., Scheeres, D.J. 2011. Icarus 214, 161–178), as its efficiency is correlated with the secondary elongation. Sharma (Sharma, I. 2014. Icarus 229, 278–294) found that rubble-pile satellites with a 2 / b 2 ≲ 1.5 are more stable to finite structural perturbations than more elongated ones. It appears that more elongated secondaries, if they originally formed in spin fission of parent asteroid, are less likely to survive intact and they more frequently fail or fission.

Item URL in elib:https://elib.dlr.de/109644/
Document Type:Article
Title:Binary asteroid population. 3. Secondary rotations and elongations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pravec, P.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Scheirich, P.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Kušnirák, P.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Hornoch, K.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Galád, A.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Naidu, S.P.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAUNSPECIFIED
Pray, D.P.Sugarloaf Mountain Observatory, South Deerfield, MA 01373, USAUNSPECIFIED
Világi, J.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMPI UK, Bratislava SK-84248, SlovakiaUNSPECIFIED
Gajdoš, Š.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMPI UK, Bratislava SK-84248, SlovakiaUNSPECIFIED
Kornoš, L.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMPI UK, Bratislava SK-84248, SlovakiaUNSPECIFIED
Krugly, Yu.N.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, UkraineUNSPECIFIED
Cooney, W.R.Sonoita Research Observatory, 77 Paint Trail, Sonoita, AZ 85637, USAUNSPECIFIED
Gross, J.Sonoita Research Observatory, 77 Paint Trail, Sonoita, AZ 85637, USAUNSPECIFIED
Terrell, D.Sonoita Research Observatory, 77 Paint Trail, Sonoita, AZ 85637, USAUNSPECIFIED
Gaftonyuk, N.Crimean Astrophysical Observatory, Department of Radioastronomy and Geodynamics, Simeiz 98680, CrimeaUNSPECIFIED
Pollock, J.Physics and Astronomy Department, Appalachian State University, Boone, NC 28608, USAUNSPECIFIED
Husárik, M.Astronomical Institute of the Slovak Academy of Sciences, SK-05960 Tatranská Lomnica, SlovakiaUNSPECIFIED
Chiorny, V.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, UkraineUNSPECIFIED
Stephens, R.D.Center for Solar System Studies, 9302 Pittsburgh Avenue, Suite 200, Rancho Cucamonga, CA 91730, USAUNSPECIFIED
Durkee, R.Shed of Science Observatory, 5213 Washburn Ave. S, Minneapolis, MN 55410, USAUNSPECIFIED
Reddy, V.Planetary Science Institute, Tucson, AZ 85719, USAUNSPECIFIED
Dyvig, R.Badlands Observatory, 12 Ash Street, P.O. Box 37, Quinn, SD 57775, USAUNSPECIFIED
Vraštil, J.Astronomical Institute, Academy of Sciences of the Czech Republic, Fričova 1, CZ-25165 Ondřejov, Czech RepublicUNSPECIFIED
Žižka, J.Institute of Astronomy, Faculty of Mathematics and Physics, Charles University, Prague, V Holešovičkách 2, CZ-18000 Prague 8, Czech RepublicUNSPECIFIED
Mottola, S.stefano.mottola (at) dlr.deUNSPECIFIED
Hellmich, S.stephan.hellmich (at) dlr.deUNSPECIFIED
Oey, J.Blue Mountains Observatory, Leura, NSW, AustraliaUNSPECIFIED
Benishek, V.Belgrade Astronomical Observatory, Volgina 7, 11060 Belgrade 38, SerbiaUNSPECIFIED
Kryszczyńska, A.Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Sloneczna 36, 60-286 Poznań, PolandUNSPECIFIED
Higgins, D.Hunters Hill Observatory, Ngunnawal, Canberra, AustraliaUNSPECIFIED
Ries, J.The University of Texas at Austin, Astronomy Department/McDonald Observatory, 1 University Station C1400, Austin, TX 78712-0259, USAUNSPECIFIED
Marchis, F.Carl Sagan Center at the SETI Institute, 189 Bernado Av., Mountain View, CA 94043, USAUNSPECIFIED
Baek, M.Carl Sagan Center at the SETI Institute, 189 Bernado Av., Mountain View, CA 94043, USAUNSPECIFIED
Macomber, B.Department of Astronomy, University of California at Berkeley, Berkeley, CA 94720, USAUNSPECIFIED
Inasaridze, R.Kharadze Abastumani Astrophysical Observatory, Ilia State University, G. Tsereteli str. 3, Tbilisi 0162, GeorgiaUNSPECIFIED
Kvaratskhelia, O.Kharadze Abastumani Astrophysical Observatory, Ilia State University, G. Tsereteli str. 3, Tbilisi 0162, GeorgiaUNSPECIFIED
Ayvazian, V.Kharadze Abastumani Astrophysical Observatory, Ilia State University, G. Tsereteli str. 3, Tbilisi 0162, GeorgiaUNSPECIFIED
Rumyantsev, V.Crimean Astrophysical Observatory, 98409 Nauchny, CrimeaUNSPECIFIED
Masi, G.Campo Catino Observatory, I-03016 Guarcino, ItalyUNSPECIFIED
Colas, F.IMCCE-CNRS-Observatoire de Paris, 77 avenue Denfert Rochereau, 75014 Paris, FranceUNSPECIFIED
Lecacheux, J.IMCCE-CNRS-Observatoire de Paris, 77 avenue Denfert Rochereau, 75014 Paris, FranceUNSPECIFIED
Montaigut, R.OPERA Observatory, 33820 Saint Palais, FranceUNSPECIFIED
Leroy, A.OPERA Observatory, 33820 Saint Palais, FranceUNSPECIFIED
Brown, P.Elginfield Observatory, Department of Physics & Astronomy, University of Western Ontario, London, Ontario N6A 3K7, CanadaUNSPECIFIED
Krzeminski, Z.Elginfield Observatory, Department of Physics & Astronomy, University of Western Ontario, London, Ontario N6A 3K7, CanadaUNSPECIFIED
Molotov, I.Keldysh Institute of Applied Mathematics, Russian Academy ofSciences, Miusskaya sq. 4, Moscow 125047, RussiaUNSPECIFIED
Reichart, D.Physics and Astronomy Department, University of North Carolina, Chapel Hill, NC 27514, USAUNSPECIFIED
Haislip, J.Physics and Astronomy Department, University of North Carolina, Chapel Hill, NC 27514, USAUNSPECIFIED
LaCluyze, A.Physics and Astronomy Department, University of North Carolina, Chapel Hill, NC 27514, USAUNSPECIFIED
Date:March 2016
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:267
DOI :10.1016/j.icarus.2015.12.019
Page Range:267 - 295
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Asteroids, rotation; Asteroids, dynamics; Near-Earth objects; Photometry
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Hellmich, Stephan
Deposited On:15 Dec 2016 10:34
Last Modified:06 Sep 2019 15:26

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