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filar micrometer
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filar micrometer

instrument

Learn about this topic in these articles:

use in asteroid detection

  • asteroid distribution between Mars and Jupiter
    In asteroid: Asteroids as individual worlds

    A filar micrometer, an instrument normally used in conjunction with a telescope for visual measurement of the separations of double stars, was employed to estimate the diameters of the first four known asteroids. The results established that Ceres was the largest asteroid, having a diameter estimated…

    Read More
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