Abstract
Abstract Photographic observations of Jupiter and its Red Spot between 13 November 1969 and 21 September 1970 are reported. The Red Spot continues its 90-day oscillation in longitude with considerable regularity. An outstanding event of the apparition was the appearance of a new disturbance in the South Tropical Zone. A bright spot at zenographic latitude 23°.8 N displayed the shortest rotation period ever recorded on Jupiter, 9 h 47 m 3 s .
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