aegis 2008 annual assembly 11 december 2008 propel – asteroid proper elements bojan novaković and...
TRANSCRIPT
Acad
em
ic a
nd E
ducat ional Gr id Init iat ive o
f Serbia
A E G I S
AEGIS 2008 Annual Assembly
11 December 2008
PROPEL – Asteroid proper elements
Bojan Novaković and Zoran Knežević
Astronomical Observatory Belgrade
Serbia
A E G I S
11 December 2008
PROPEL – Asteroid proper elements
Proper elements are quasi integrals of N-body equations of motion. They are nearly constant in time and represent average characteristics of motion over very long time spans, up to hundreds of millions of years. They are used to:
study long term dynamical evolution of asteroids study evolution of the asteroid belt through their classification
into the collisional families assess the stability of their motion identify transport mechanisms at work in the Solar system.
A E G I S
11 December 2008
Importance of Grid for PROPEL
Why grid makes a difference for PROPEL? Computation of asteroid proper elements
requires numerical integrations of thousands of orbits over time spans on the order of millions of years. This is computationally complex, CPU intensive and time consuming procedure. Since it can be simply parallelized by grouping similar orbits into independent batches, it is perfectly suitable for the grid.
The need to speed up the time consuming computations and make them more efficient is justified by the large increase of observational data expected from the next generation all sky surveys.
A E G I S
11 December 2008
Gridification topics
Software Installation Management Running Jobs Data Management Data Access Application-Level Monitoring Benchmarking Installation of appropriate FORTRAN compiler Optimisation for platforms based on both AMD
and Intel Processors Preparation of SEE-GRID-2 wiki pages about
Software installation management Execution and data collecting automation
Launching of PROPEL web site
A E G I S
11 December 2008
PROPEL statistics
A E G I S
11 December 2008
AstDys databaseScreenshot of the AstDys’ statistics: country of visitors’ origin and number of visits.http://hamilton.dm.unipi.it/astdys/
A E G I S
11 December 2008
List of contributors
Zoran Knežević Bojan Novaković Branko Marović Milan Potočnik Branimir Acković Antun Balaž Vladimir Bajčeta Edi Bon