Theme Abstract Authors
Is the current Mars cratering rate typical of geologic time? The current Mars cratering rate for small (0.1-3 m) bolides is being measured by Mars Reconnaissance Orbiter. This talk will discuss whether this cratering rate should be trusted to date surfaces millions of years old. McEwen
Current Impact Flux at Mars Discoveries of over 200 fresh, dated impact sites on Mars allow us to measure the current impact rate and validate cratering chronology models. We can also use well-constrained formation dates of these craters to investigate any possible enhancement in asteroid bombardment at aphelion, when Mars is closer to the main asteroid belt. I.J. Daubar, A.S. McEwen, S. Byrne, M. Kennedy
The flux of meteoroids in the Martian system: Models and Observations In this presentation we will review the observations and models to-date and identify measurements and opportunities to acquire urgently-needed data. A.A. Christou, J. Vaubaillon
Effect of Sun elevation on crater counts on Phobos When the Sun is high the old craters are not seen, and when the angle between the Sun and horizon is low the most part of the surface is covered by a shadow. So we can select the area with optimal luminosity where all craters could be determined. T.V. Shingareva, A.T. Basilevsky, K. Gwinner
no no no
Extension of the existing meteor models to the Martian atmosphere We present review of the existing meteoroid models describing their entry into an atmosphere. As an application, we discuss how to derive meteoroid mass and other properties from the observed deceleration rate. We highlight possible future improvements and possible application of the selected model to the atmosphere of Mars. Maria Gritsevich, Apostolos Christou
Исследование тонкой структуры радиантов крупных метеорных потоков второго полугодия. В работе представлены результаты обработки по специально разработанной методике более 3,5 тыс. метеоров, зарегистрированных в 2006 г. на камере FAVOR с высокой проницающей силой. Данная методика позволяет, в частности, при наличии большого количества метеоров, отождествленных с тем или иным потоком, получить не только точное значение координат радианта данного потока, но и некоторое представление о тонкой структуре радианта, например, значения положений субрадиантов, измеренных по метеорам разных яркостей. Приводится анализ нескольких крупных метеорных потоков, для которых на основе большого статистического материала были построены распределения по датам для ярких и слабых метеоров. Леонов В.А.
- - -
Meteoroid fragmentation in the Martian atmosphere Data on terrestrial bolides with detail observational data demonstrated that that most of the corresponding meteoroids are very weak when they hit the top of atmosphere. The cause may be that most meteoroids (even at meter scale) may be highly fractured by previous collisions, or even rubble pile structures. The measured low strength suggest easy breakup in Mars atmosphere for many meteoroids, the altitudes of breakup in the Martian atmosphere are estimated. Popova O.
Официальный Интернет-портал Московского государственного университета геодезии и картографии (МИИГАиК)
Информация © МИИГАиК, 2002–2016 portal@miigaik.ru
Разработка © Управление информатизации МИИГАиК