@article{3715c1934c8e4d269a040e13b22a8147,
title = "Spin rate distribution of small asteroids",
abstract = "The spin rate distribution of main belt/Mars crossing (MB/MC) asteroids with diameters 3-15 km is uniform in the range from f = 1 to 9.5 d-1, and there is an excess of slow rotators with f < 1 d-1. The observed distribution appears to be controlled by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect. The magnitude of the excess of slow rotators is related to the residence time of slowed down asteroids in the excess and the rate of spin rate change outside the excess. We estimated a median YORP spin rate change of ≈ 0.022 d-1 / Myr for asteroids in our sample (i.e., a median time in which the spin rate changes by 1 d-1 is ≈ 45 Myr), thus the residence time of slowed down asteroids in the excess is ≈ 110 Myr. The spin rate distribution of near-Earth asteroids (NEAs) with sizes in the range 0.2-3 km (∼5 times smaller in median diameter than the MB/MC asteroids sample) shows a similar excess of slow rotators, but there is also a concentration of NEAs at fast spin rates with f = 9 - 10 d-1. The concentration at fast spin rates is correlated with a narrower distribution of spin rates of primaries of binary systems among NEAs; the difference may be due to the apparently more evolved population of binaries among MB/MC asteroids.",
keywords = "Asteroids, Near-Earth objects, Photometry, Satellites of asteroids, rotation",
author = "P. Pravec and Harris, {A. W.} and D. Vokrouhlick{\'y} and Warner, {B. D.} and P. Ku{\v s}nir{\'a}k and K. Hornoch and Pray, {D. P.} and D. Higgins and J. Oey and A. Gal{\'a}d and {\v S} Gajdo{\v s} and L. Korno{\v s} and J. Vil{\'a}gi and M. Hus{\'a}rik and Krugly, {Yu N.} and V. Shevchenko and V. Chiorny and N. Gaftonyuk and Cooney, {W. R.} and J. Gross and D. Terrell and Stephens, {R. D.} and R. Dyvig and V. Reddy and Ries, {J. G.} and F. Colas and J. Lecacheux and R. Durkee and G. Masi and Koff, {R. A.} and R. Goncalves",
note = "Funding Information: The work at Ond{\v r}ejov was supported by the Grant Agency of the Czech Republic, Grant 205/05/0604. The work at Space Science Institute (A.W.H.) was supported by Grant NAG5-13244 from the NASA Planetary Geology-Geophysics Program. D. Vokrouhlick{\'y} has been supported by the Research Program MSM0021620860 of the Czech Ministry of Education. Funding for observations at the Palmer Divide Observatory (B.D.W.) has been provided by NASA grant NNG06GI32G, by National Science Foundation grant AST-0607505, and by a Gene Shoemaker NEO grant from the Planetary Society. Funding for observations at the Carbuncle Hill Observatory (D. Pray) and at the Hunters Hill Observatory (D. Higgins) has been provided by Gene Shoemaker NEO Grants from the Planetary Society. The work at Modra Observatory was supported by the Slovak Grant Agency for Science VEGA, Grants 1/3074/06 and 1/3067/06. The work at Skalnat{\'e} Pleso Observatory (Astronomical Institute SAS, Tatransk{\'a} Lomnica) was supported by the Slovak Grant Agency for Sciences VEGA, Grant 2/7009/27. We thank to M. Pikler and G. {\v C}erv{\'a}k for observational assistance. The work at McDonald Observatory was supported by NASA's NEO Observation Program Grant NNG04G124G. The work at Pic du Midi Observatory has been supported by CNRS – Programme de Plan{\'e}tologie. We thank to P. Brown, S. Nudds, and Z. Krzeminski for their contribution with observations from Elginfield Observatory, University of Western Ontario. ",
year = "2008",
month = oct,
doi = "10.1016/j.icarus.2008.05.012",
language = "English (US)",
volume = "197",
pages = "497--504",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
number = "2",
}