منابع مشابه
Secular spin dynamics of inner main-belt asteroids
Understanding the evolution of asteroid spin states is challenging work, in part because asteroids have a variety of orbits, shapes, spin states, and collisional histories but also because they are strongly influenced by gravitational and non-gravitational (YORP) torques. Using efficient numerical models designed to investigate asteroid orbit and spin dynamics, we study here how several individ...
متن کاملFraction of Contact Binary Trojan Asteroids
We present the results of an optical lightcurve survey of 114 Jovian Trojan asteroids conducted to determine the fraction of contact binaries. Sparse-sampling was used to assess the photometric range of the asteroids and those showing the largest ranges were targeted for detailed follow-up observations. This survey led to the discovery of two Trojan asteroids, (17365) and (29314) displaying lar...
متن کاملBinary Asteroids and the Formation of Doublet Craters
found we could duplicate the observed fraction of doublet craters found on Earth, Venus, and Mars. Our results suggest At least 10% (3 out of 28) of the largest known impact craters that any search for asteroid satellites should place emphasis on Earth and a similar fraction of all impact structures on on km-sized Earth-crossing asteroids with short-rotation Venus are doublets (i.e., have a com...
متن کاملBinary asteroids in the near-Earth object population.
Radar images of near-Earth asteroid 2000 DP107 show that it is composed of an approximately 800-meter-diameter primary and an approximately 300-meter-diameter secondary revolving around their common center of mass. The orbital period of 1.755 +/- 0.007 days and semimajor axis of 2620 +/- 160 meters constrain the total mass of the system to 4.6 +/- 0.5 x 10(11) kilograms and the bulk density of ...
متن کاملForming Binary Near-Earth Asteroids From Tidal Disruptions
Title of Dissertation: Forming Binary Near-Earth Asteroids From Tidal Disruptions Kevin J. Walsh, Doctor of Philosophy, 2006 Dissertation directed by: Professor Derek C. Richardson Department of Astronomy We present simulations and observations as part of a model of the binary near-Earth asteroid population. The study of binary asteroid formation includes a series of simulations of near-Earth a...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1992
ISSN: 0074-1809
DOI: 10.1017/s0074180900091129