Shape and motion estimate of LEO debris using light curves |
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Authors: | T Yanagisawa H Kurosaki |
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Institution: | Japan Aerospace Exploration Agency, 7-44-1 Jindaiji-higashi-machi, Chofu, Tokyo 182-8522, Japan |
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Abstract: | We have derived a tri-axial ellipsoidal model of an LEO object, a Cosmos 2082 rocket body, including its rotational axis direction, rotation period, precession, and a compositional parameter, using only light curve data from an optical telescope. The brightness of the object was monitored for two days and least-squares fitting was used to determine these values. The derived axial ratios are 100:18:18, the coordinates of the rotational axis direction on the celestial sphere are R.A. = 305.8° and Dec. = 2.6°, and its observed average rotation period is 41 s. When precession is considered, its amplitude and precession period are 30.5° and 29.4 min. These results show that optical light curve data are sufficient to determine the shapes and the motions of LEO objects. |
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Keywords: | Space debris Optical observation Light curve |
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