STARS' POSITIONS DETERMINED BY COMBINING MICROMETRIC OBSERVATIONS WITH AN OBSERVED KNOWN STAR IN A VERTICAL PLANE CLOSE TO THE MERIDIAN.
ARMY ENGINEER GEODESY INTELLIGENCE AND MAPPING RESEARCH AND DEVELOPMENT AGENCY FORT BELVOIR VA
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The research note describes the mathematical formulations developed to provide accurate positions of stars, so that they can be used as reference stars in astronomical photography. Bodies, such as the moon, minor planets, artificial earth satellites, and the like, are photographed against stellar background, and their positions are derived from their orientation to certain known stars, the positions of which have been established. The accuracy in the positions of the bodies depends wholly on the accuracy of the positions of the known stars. The positions determined for some stars selected, however, are of a low order of accuracy. Here, a method and technique for improving accuracy in the positions of these selected stars are employed. The selected stars are to be related among themselves by means of a filar micrometer. If at least one of these stars is chosen to form a pair with a known stars position, and both are observed in the same vertical plane, not far from the meridian, the position of the star can be determined as function of the coordinates of the known star thus, the positions of all the unknown stars can definitely be determined. Author