Abstract
THE LUNAR ECLIPSE OF SUNDAY, OCTOBER 16.—This eclipse, which will be nearly total, begins at 9h. 14m. (position angle 45°), reaches its greatest phase (0.938 of the diameter, the south limb being uneclipsed) at 10h. 54m., and ends at 12h. 34m. (position angle 283°). As there is not another large lunar eclipse visible at a convenient altitude in the British Isles until September, 1932, this occasion should be utilised. The chief work during lunar eclipses is the observation of occultations, both phases being visible under similar conditions. Such observations facilitate the determination of the moon's diameter, and serve to test the suggestion that the lunar atmosphere may have more refractive power by day than by night. Six stars in the Bonn Durchmusterung will be occulted during eclipse. The details are given in the following list (computed for Greenwich):—
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Our Astronomical Column. Nature 108, 226 (1921). https://doi.org/10.1038/108226a0
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DOI: https://doi.org/10.1038/108226a0