The angular diameter of vesta from speckle interferometry |
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| Authors: | Simon P Worden Murray K Stein Gary D Schmidt JRP Angel |
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| Institution: | Steward Observatory, The University of Arizona, Tuczon, Arizona 85721, USA |
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| Abstract: | It is shown that the autocorrelation function of a telescope diffraction-limited image is closely approximated by a subtraction of the mean cross correlation of pairs of speckle photographs from the mean autocorrelation of the same set of data. This fact is used to derive the angular diameter of the asteroid Vesta from a series of speckle interferometry data. The resultant apparent angular diameter of 0″.40 ± 0″.04 corresponds to an absolute diameter of 513 ± 51 km. |
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