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Stroboscopic Shooting of Comets
Authors: Viktor Ya. Tsvetkov, Igor' P. Deshko
Number of views: 44
The article examines the photogrammetric method for determining the characteristics of a moving body in space research. The object of research is comets. The method belongs to the field of space photogrammetry and space geoinformatics. A comet is considered as a moving body, but the technique can be used to track meteorites and other small celestial bodies. Stroboscopic shooting is proposed as a method of observation and measurement. A simple stroboscope in the form of a circle with a circular hole at the edge is proposed. Stroboscopic shooting allows not only photographing sections of the trajectory, but also linking them to time. Stroboscopic shooting allows you to change two parameters: shooting frequency and exposure time. These parameters are selected for the speed of the moving object and its distance from the shooting point. The basic diagram of stroboscopic shooting is described. Three qualitatively different sections of the trajectory of a moving object, which are obtained during stroboscopic shooting, are described. The plots characterize the approach of the subject to the shooting point. The most informative is the second section of the trajectory, which corresponds to the middle of the trajectory. A schematic diagram of photographing a moving object is described. Estimation formulas for determining the velocity of a space body are given. A practical example of shooting with an open shutter and using a stroboscope is given. The method allows one to study the dynamics of an object's movement, including its destruction or collision with another object. The method can be applied to survey ground objects, for example, aircraft or missiles of any range.