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Nature volume 113, page 655 (03 May 1924) | Download Citation



JUPITER.—This planet, now rising before midnight, will soon be visible in the evening hours. The chief features, including the great Red Spot and the South Tropical Disturbance situated in nearly the same latitude, continue to be perceptible and invite renewed Observation. The Red Spot is at present situated in longitude about 180° (System II.), and will therefore come to the meridian about 4h 58′ before and after the passages of the zero meridian (based on the rotation period gh 55 40-638) as given in the Nautical Almanac. In fact, the Red Spot is now on the opposite side of the planet to the place of the zero meridian. The South Temperate Disturbance is situated in the region following the Red Spot, and the preceding end of the former is, according to Mr. P. M. Ryves's recent observations at Saragossa in Spain, in longitude 197°, and corresponds in place with the following end of the Hollow in the great South Equatorial Belt. The conjunction of the centres of the two objects will probably occur in about three years, for the difference in their velocities is now only 3-8s per rotation. In 1901 the difference was about 20S.

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