Abstract
White Spot on Saturn. It is only at long intervals that any markings are seen on Saturn of a character suitable for the determination of rotation-period; hence advantage should be taken of the opportunity afforded by the appearance of a white spot on the equatorial zone. It was detected on August 3 at 22h 30m U.T. by Mr. William T. Hay at Norbury, having just passed the central meridian. He immediately telephoned to Dr. W. H. Steavenson at West Norwood, who verified the discovery, and noted that the spot was elliptical in outline, and extended in latitude from the south edge of the North Equatorial belt to the projection of the crape ring. The accepted period of rotation for the equator is 101/4 hours, so that seven rotations are equal to 3 days less J hour; the following are approximate dates of crossing the central meridian:
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Astronomical Topics. Nature 132, 248 (1933). https://doi.org/10.1038/132248a0
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DOI: https://doi.org/10.1038/132248a0
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