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Photometric Survey of Binary Near-Earth Asteroids

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

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Official 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

Abstract

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>)%.

Item URL in elib:https://elib.dlr.de/19326/
Document Type:Article
Title:Photometric Survey of Binary Near-Earth Asteroids
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pravec, PetrAstronomical 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
Kusnirak, P.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech RepublicUNSPECIFIED
Sarounova, L.Astronomical Institute, Academy of Sciences of the Czech Republic, Fricova 1, CZ-25165 Ondrejov, Czech RepublicUNSPECIFIED
Mottola, StefanoUNSPECIFIEDUNSPECIFIED
Hahn, GerhardUNSPECIFIEDUNSPECIFIED
Brown, P.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, CanadaUNSPECIFIED
Esquerdo, G.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, CanadaUNSPECIFIED
Kaiser, N.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, CanadaUNSPECIFIED
Krzeminski, Z.Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, CanadaUNSPECIFIED
Pray, D.P.Carbuncle Hill Observatory, P.O. Box 946, Coventry, RI 02816, USAUNSPECIFIED
Warner, B.D.Palmer Divide Observatory, 17995 Bakers Farm Rd., Colorado Springs, CO 80908, USAUNSPECIFIED
Harris, A.W.Space Science Institute, 4603 Orange Knoll Ave., La Canada, CA 91011, USAUNSPECIFIED
Nolan, M.C.Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, PR 00612, USAUNSPECIFIED
Howell, E.S.Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, PR 00612, USAUNSPECIFIED
Benner, L.A.M.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Margot, J.-L.Department of Astronomy, Cornell University, Ithaca, NY 14853, USAUNSPECIFIED
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, SlovakiaUNSPECIFIED
Holliday, W.River Oaks Observatory, 1125 Isaac Creek Circle, New Braunfels, TX 78132, USAUNSPECIFIED
Hicks, M.D.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Krugly, Yu.N.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, UkraineUNSPECIFIED
Tholen, D.Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, Honolulu, HI 96822, USAUNSPECIFIED
Whiteley, R.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USAUNSPECIFIED
Marchis, F.Department of Astronomy, University of California, 601 Campbell Hall, Berkeley, CA 94720, USAUNSPECIFIED
DeGraff, D.R.Alfred University, 1 Saxon Drive, Alfred, NY 14802, USAUNSPECIFIED
Grauer, A.Department of Physics and Astronomy, University of Arkansas at Little Rock, Little Rock, AR 72204, USAUNSPECIFIED
Larson, S.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USAUNSPECIFIED
Velichko, F.P.Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, UkraineUNSPECIFIED
Cooney, W.R.BREC, LSU, BRAS Highland Road Park Observatory, 13800 Highland Rd., Baton Rouge, LA 70810, USAUNSPECIFIED
Stephens, R.Santana Observatory, Rancho Cucamonga, CA 91737, USAUNSPECIFIED
Zhu, J.Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing, 100012, ChinaUNSPECIFIED
Kirsch, K.Badlands Observatory, Quinn, SD 57775, USAUNSPECIFIED
Dyvig, R.Badlands Observatory, Quinn, SD 57775, USAUNSPECIFIED
Snyder, L.MacLean/Tahoe Observatories, Incline Village, NV 89450, USAUNSPECIFIED
Reddy, V.Department of Space Studies, University of North Dakota, Grand Forks, ND 58202, USAUNSPECIFIED
Moore, S.Astronomy Department, Smith College, Northampton, MA 01063, USAUNSPECIFIED
Gajdoš, Š.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMFI UK, Bratislava SK-84248, SlovakiaUNSPECIFIED
Világi, J.Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMFI UK, Bratislava SK-84248, SlovakiaUNSPECIFIED
Masi, G.Physics Department, University of Rome “Tor Vergata,” Via della Ricerca Scientifica 1, 00133 Rome, Italy; Campo Catino Observatory, Guarcino, I-03016, ItalyUNSPECIFIED
Higgins, D.Hunters Hill Observatory, 7 Mawalan Street, Ngunnawal ACT 2913, Canberra, AustraliaUNSPECIFIED
Funkhouser, G.Department of Astronomy, Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USAUNSPECIFIED
Knight, B.Department of Astronomy, Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USAUNSPECIFIED
Slivan, S.Department of Astronomy, Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USAUNSPECIFIED
Behrend, R.Observatoire de Genève, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Grenon, M.Observatoire de Genève, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Burki, G.Observatoire de Genève, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Roy, R.Blauvac Observatory, St Estève 84570-Blauvac, FranceUNSPECIFIED
Demeautis, C.Village-Neuf Observatory, 9 rue de Huningue, F-68300 Saint-Louis, FranceUNSPECIFIED
Matter, D.Village-Neuf Observatory, 9 rue de Huningue, F-68300 Saint-Louis, FranceUNSPECIFIED
Waelchli, N.F.-X. Bagnoud Observatory, CH-3961 St-Luc, SwitzerlandUNSPECIFIED
Refaz, Y.F.-X. Bagnoud Observatory, CH-3961 St-Luc, SwitzerlandUNSPECIFIED
Klotz, A.Saint-Caprais, F-81800 Rabastens, France; Observatoire de Haute Provence, F-04870 Saint-Michel l’observatoire, FranceUNSPECIFIED
Rieugné, M.Saint-Caprais, F-81800 Rabastens, FranceUNSPECIFIED
Thierry, P.Saint-Caprais, F-81800 Rabastens, FranceUNSPECIFIED
Cotrez, V.Saint-Hélène Observatory, 6 route des Tronquats, F-33480 Saint-Hélène, FranceUNSPECIFIED
Brunetto, L.Antibes Observatory, 252 Chemin Spagnon, F-06600 Antibes, FranceUNSPECIFIED
Kober, G.Antibes Observatory, 252 Chemin Spagnon, F-06600 Antibes, FranceUNSPECIFIED
Date:7 September 2005
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:181
DOI :10.1016/j.icarus.2005.10.014
Page Range:pp. 63-93
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Asteroids, binary, photometry
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Asteroiden und Kometen (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Mottola, Dr.phys. Stefano
Deposited On:11 Apr 2006
Last Modified:14 Jan 2010 20:10

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