摘要: Areocentric coordinates of about 150 Martian surface features are determined from photographs taken at the 1954 and 1956 oppositions. The data lead to the tentative conclusion that the flattening of the solid surface of the planet... 展开 Areocentric coordinates of about 150 Martian surface features are determined from photographs taken at the 1954 and 1956 oppositions. The data lead to the tentative conclusion that the flattening of the solid surface of the planet is about twice the dynamical value. The coordinates of a large number of clouds and other temporary features are also given. (Author) 收起