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Tumbling asteroids

Pravec, Petr und Harris, Alan W. und Scheirich, P. und Kušnirák, P. und Šarounová, L. und Hergenrother, Cark W. und Mottola, Stefano und Hicks, Michael und Masi, Gianluca und Krugly, Yura N. und Shevchenko, V.G. und Nolan, Michael C. und Howell, Ellen S. und Kaasalainen, Mikko und Galád, A. und Brown, P. und DeGraff, D. R. und Lambert, J. V. und Cooney Jr., V. R. und Foglia, S. (2004) Tumbling asteroids. Icarus: International Journal of Solar System Studies, 173 (1), Seiten 108-131. Elsevier. DOI: doi:10.1016/j.icarus.2004.07.021.

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We present both a review of earlier data and new results on non-principal axis rotators (tumblers) among asteroids. Among new tumblers found, the best data we have are for 2002 TD60, 2000WL107, and (54789) 2001 MZ7—each of them shows a lightcurve with two frequencies (full terms with linear combinations of the two frequencies are present in the lightcurve). For 2002 TD60, we have constructed a physical model of the NPA rotation. Other recent objects which have been found to be likely tumblers based on their lightcurves that do not fit with a single periodicity are 2002 NY40, (16067) 1999 RH27, and (5645) 1990 SP. We have done a statistical analysis of the present sample of the population of NPA rotators. It appears that most asteroids larger than ~ 0.4 km with estimated damping timescales (Harris, 1994, Icarus 107, 209) of 4.5 byr and longer are NPA rotators. The statistic of two short-period tumblers (D = 0.04 and 0.4 km) with non-zero tensile strength suggests that for them the quantity μQ/T , where μ is the mechanical rigidity, Q is the elastic dissipation factor, and T is a spin excitation age (i.e., a time elapsed since the last significant spin excitation event), is greater by two to four orders of magnitude than the larger, likely rubble-pile tumblers. Among observational conditions and selection effects affecting detections of NPA rotations, there is a bias against detection of low-amplitude (small elongation) tumblers.

Dokumentart:Zeitschriftenbeitrag
Titel:Tumbling asteroids
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Pravec, PetrAstronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Harris, Alan W.Space Science Institute, Boulder, CO 80301, USA
Scheirich, P.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Kušnirák, P.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Šarounová, L.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Hergenrother, Cark W.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA
Mottola, StefanoNICHT SPEZIFIZIERT
Hicks, MichaelJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Masi, GianlucaPhysics Department, University of Rome “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
Krugly, Yura N.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, Ukraine
Shevchenko, V.G.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, Ukraine
Nolan, Michael C.Arecibo Observatory, National Astronomy and Ionosphere Center, PR 00612, USA
Howell, Ellen S.Arecibo Observatory, National Astronomy and Ionosphere Center, PR 00612, USA
Kaasalainen, MikkoDepartment of Mathematics/Rolf Nevanlinna Institute, University of Helsinki, PO Box 4, FIN-00014, Finland
Galád, A.Modra Observatory, Astronomical Institute, FMFI Comenius University, Bratislava, Slovak Republic
Brown, P.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
DeGraff, D. R.Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
Lambert, J. V.Air Force Maui Optical and Supercomputing Facility, Kihei, HI 96753, USA
Cooney Jr., V. R.Blackberry Observatory, 1927 Fairview Dr., Port Allen, LA 70767, USA
Foglia, S.Serafino Zani Observatory, Lumezzane, I-25065, Italy
Datum:25 September 2004
Erschienen in:Icarus: International Journal of Solar System Studies
Band:173
DOI :doi:10.1016/j.icarus.2004.07.021
Seitenbereich:Seiten 108-131
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:Asteroids, excited rotation, photometry
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Asteroiden und Kometen (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Asteroiden und Kometen
Hinterlegt von: Dr.phys. Stefano Mottola
Hinterlegt am:24 Jan 2007
Letzte Änderung:12 Dez 2013 20:08

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