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Photometric Survey of Binary Near-Earth Asteroids

Pravec, Petr und Scheirich, P. und Kusnirak, P. und Sarounova, L. und Mottola, Stefano und Hahn, Gerhard und Brown, P. und Esquerdo, G. und Kaiser, N. und Krzeminski, Z. und Pray, D.P. und Warner, B.D. und Harris, A.W. und Nolan, M.C. und Howell, E.S. und Benner, L.A.M. und Margot, J.-L. und Galád, A. und Holliday, W. und Hicks, M.D. und Krugly, Yu.N. und Tholen, D. und Whiteley, R. und Marchis, F. und DeGraff, D.R. und Grauer, A. und Larson, S. und Velichko, F.P. und Cooney, W.R. und Stephens, R. und Zhu, J. und Kirsch, K. und Dyvig, R. und Snyder, L. und Reddy, V. und Moore, S. und Gajdoš, Š. und Világi, J. und Masi, G. und Higgins, D. und Funkhouser, G. und Knight, B. und Slivan, S. und Behrend, R. und Grenon, M. und Burki, G. und Roy, R. und Demeautis, C. und Matter, D. und Waelchli, N. und Refaz, Y. und Klotz, A. und Rieugné, M. und Thierry, P. und Cotrez, V. und Brunetto, L. und Kober, G. (2005) Photometric Survey of Binary Near-Earth Asteroids. Icarus: International Journal of Solar System Studies, 181 (1), Seiten 63-93. Elsevier. DOI: 10.1016/j.icarus.2005.10.014. ISSN 0019-1035.

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Offizielle URL: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6WGF-4HTBM4P-1-KD&_cdi=6821&_user=100058&_orig=browse&_coverDate=03%2F31%2F2006&_sk=998189998&view=c&wchp=dGLbVtb-zSkzV&md5=b8d96708a8ea4ea68c6142ca216cbe63&ie=/sdarticle.pdf

Kurzfassung

Photometric data on 17 binary near-Earth asteroids (15 of them are certain detections, two are probables) were analysed and characteristic properties of the near-Earth asteroid (NEA) binary population were inferred. We have found that binary systems with a secondary-to-primary mean diameter ratio Ds/Dp &gt; 0.18 concentrate among NEAs smaller than 2 km in diameter; the abundance of such binaries decreases significantly among larger NEAs. Secondaries show an upper size limit of Ds = 0.5–1 km. Systems with Ds/Dp &lt; 0.5 are abundant but larger satellites are significantly less common. Primaries have spheroidal shapes and they rotate rapidly, with periods concentrating between 2.2 to 2.8 h and with a tail of the distribution up to ~4 h. The fast rotators are close to the critical spin for rubble piles with bulk densities about 2 g/cm<sup>3</sup>. Orbital periods show an apparent cut-off at P<sub>orb</sub> ~11 h; closer systems with shorter orbital periods have not been discovered, which is consistent with the Roche limit for strengthless bodies. Secondaries are more elongated on average than primaries. Most, but not all, of their rotations appear to be synchronized with the orbital motion; non-synchronous secondary rotations may occur especially among wider systems with P<sub>orb</sub> > 20 h. The specific total angular momentum of most of the binary systems is similar to within ±20% and close to the angular momentum of a sphere with the same total mass and density, rotating at the disruption limit; this suggests that the binaries were created by mechanism(s) related to rotation near the critical limit and that they neither gained nor lost significant amounts of angular momentum during or since formation. A comparison with six small asynchronous binaries detected in the main belt of asteroids suggests that the population extends beyond the region of terrestrial planets, but with characteristics shifted to larger sizes and longer periods. The estimated mean proportion of binaries with Ds/Dp &gt; 0.18 among NEAs larger than 0.3 km is 15±4%. Among fastest rotating NEAs larger than 0.3 km with periods between 2.2-2.8 h, the mean proportion of such binaries is (66<sup>+10</sup><sub>−12</sub>)%.

Dokumentart:Zeitschriftenbeitrag
Titel:Photometric Survey of Binary Near-Earth 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
Scheirich, P.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Kusnirak, P.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Sarounova, L.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech Republic
Mottola, StefanoNICHT SPEZIFIZIERT
Hahn, GerhardNICHT SPEZIFIZIERT
Brown, P.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
Esquerdo, G.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
Kaiser, N.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
Krzeminski, Z.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
Pray, D.P.Carbuncle Hill Observatory, P.O. Box 946, Coventry, RI 02816, USA
Warner, B.D.Palmer Divide Observatory, 17995 Bakers Farm Rd., Colorado Springs, CO 80908, USA
Harris, A.W.Space Science Institute, 4603 Orange Knoll Ave., La Canada, CA 91011, USA
Nolan, M.C.Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, PR 00612, USA
Howell, E.S.Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, PR 00612, USA
Benner, L.A.M.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Margot, J.-L.Department of Astronomy, Cornell University, Ithaca, NY 14853, USA
Galád, A.Astronomical Institute, Academy of Sciences of the Czech Republic, Friˇcova 1, CZ-25165 Ondˇrejov, Czech Republic; Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMFI UK, Bratislava SK-84248, Slovakia
Holliday, W.River Oaks Observatory, 1125 Isaac Creek Circle, New Braunfels, TX 78132, USA
Hicks, M.D.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Krugly, Yu.N.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, Ukraine
Tholen, D.Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
Whiteley, R.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA
Marchis, F.Department of Astronomy, University of California, 601 Campbell Hall, Berkeley, CA 94720, USA
DeGraff, D.R.Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
Grauer, A.Department of Physics and Astronomy, University of Arkansas at Little Rock, Little Rock, AR 72204, USA
Larson, S.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA
Velichko, F.P.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, Ukraine
Cooney, W.R.BREC, LSU, BRAS Highland Road Park Observatory, 13800 Highland Rd., Baton Rouge, LA 70810, USA
Stephens, R.Santana Observatory, Rancho Cucamonga, CA 91737, USA
Zhu, J.Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing, 100012, China
Kirsch, K.Badlands Observatory, Quinn, SD 57775, USA
Dyvig, R.Badlands Observatory, Quinn, SD 57775, USA
Snyder, L.MacLean/Tahoe Observatories, Incline Village, NV 89450, USA
Reddy, V.Department of Space Studies, University of North Dakota, Grand Forks, ND 58202, USA
Moore, S.Astronomy Department, Smith College, Northampton, MA 01063, USA
Gajdoš, Š.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMFI UK, Bratislava SK-84248, Slovakia
Világi, J.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMFI UK, Bratislava SK-84248, Slovakia
Masi, G.Physics Department, University of Rome “Tor Vergata,” Via della Ricerca Scientifica 1, 00133 Rome, Italy; Campo Catino Observatory, Guarcino, I-03016, Italy
Higgins, D.Hunters Hill Observatory, 7 Mawalan Street, Ngunnawal ACT 2913, Canberra, Australia
Funkhouser, G.Department of Astronomy, Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA
Knight, B.Department of Astronomy, Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA
Slivan, S.Department of Astronomy, Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA
Behrend, R.Observatoire de Genève, CH-1290 Sauverny, Switzerland
Grenon, M.Observatoire de Genève, CH-1290 Sauverny, Switzerland
Burki, G.Observatoire de Genève, CH-1290 Sauverny, Switzerland
Roy, R.Blauvac Observatory, St Estève 84570-Blauvac, France
Demeautis, C.Village-Neuf Observatory, 9 rue de Huningue, F-68300 Saint-Louis, France
Matter, D.Village-Neuf Observatory, 9 rue de Huningue, F-68300 Saint-Louis, France
Waelchli, N.F.-X. Bagnoud Observatory, CH-3961 St-Luc, Switzerland
Refaz, Y.F.-X. Bagnoud Observatory, CH-3961 St-Luc, Switzerland
Klotz, A.Saint-Caprais, F-81800 Rabastens, France; Observatoire de Haute Provence, F-04870 Saint-Michel l’observatoire, France
Rieugné, M.Saint-Caprais, F-81800 Rabastens, France
Thierry, P.Saint-Caprais, F-81800 Rabastens, France
Cotrez, V.Saint-Hélène Observatory, 6 route des Tronquats, F-33480 Saint-Hélène, France
Brunetto, L.Antibes Observatory, 252 Chemin Spagnon, F-06600 Antibes, France
Kober, G.Antibes Observatory, 252 Chemin Spagnon, F-06600 Antibes, France
Datum:7 September 2005
Erschienen in:Icarus: International Journal of Solar System Studies
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:181
DOI :10.1016/j.icarus.2005.10.014
Seitenbereich:Seiten 63-93
Verlag:Elsevier
ISSN:0019-1035
Status:veröffentlicht
Stichwörter:Asteroids, binary, 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:11 Apr 2006
Letzte Änderung:14 Jan 2010 20:10

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