A 25-Year Progress Report Of Jupiter\u27s Oval BA

Abstract

Oval BA has now been present on Jupiter for 25 years. During this time, the east-west length of this feature, in visible wavelengths, has shown a gradual shrinkage at an average rate of 0.045 degrees/year. The average shrinkage rate of its east-west length in methane band images (wavelength of 890 nanometers) is 0.11 degrees/year. The north-south dimension of this oval has also shrunk. There is also a correlation between the latitude of Oval BA and its speed with respect to Jupiter\u27s interior