Full text of article: Russian language.

Abstract:
In this article it is examined the influence between the projection size of the point light source and the detection error of coordinate centre when projecting on the light-sensitive matrix .With the help of simulation it is formed the dependence of detection error of coordinate from magnitude of dispersion radius projection in case of different position of light source relative to the receiver. Analized operating characteristic of two delimitation of coordinate algorithms : using the method of maximal verisimilitude and using the centroid method. It is find of the ratio between the dispersion radius and size of receiver in the case of minimal error.

Key words:
point light source, detection error of coordinate, astronavigation.

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