سمینار این هفته را آقای دکتر محمد تقی میرترابی از دانشکده فیزیک شیمی دانشگاه الزهرا ارائه خواهند کرد. عنوان و چکیدهٔ سمینار ایشان به شرح زیر است:

روشی جدید برای تعیین پارامتر های  مداری اجرام نزدیک زمین

 (A New Method to Determine Orbital Elements for Near Earth Objects)

 

Abstract: Near Earth objects (NEO) are solar system objects revolving around the sun and potentially can strike the earth in near future.  These objects are mostly small asteroids, comets,  comet debris and solar orbiting satellites.  A precise method of orbit determination could help to predict path of a hazardous NEO before it get close to the earth.  The standard method of orbit determination is traditionally based on Gauss method which uses three independent observations.  Gauss method suffers from an inconsistency where it requires the three independent observations to be close to better approximate the Kepler second law. If closeness is comparable to the observational error, Gauss method losses ability to estimate the plane of the orbit. A good estimation of plane of the orbit needs wide spaced observation which would not stratify the Gauss approximation. We have developed a new method of orbit determination based on conserved quantities. We used linear relation between energy and angular momentum to contribute more than three points and determined more precise orbital elements.

این سمینار در روز یکشنبه ۱۰ آبان ماه ۱۳۹۴، ساعت ۱۵ در کلاس فیزیک ۴ در طبقهٔ اول  دانشکدهٔ فیزیک برگزار خواهد شد.