Bruce Murray Space Image Library
Southern oval on Jupiter

Farther south, the south polar hood/haze is obvious. Its northern edge is usually near 66°S. It is bluish in the enhanced image here, both due to the stronger blue color (relative to red/green) in the polar hood and also because of Rayleigh scattering near the limb. Observations have shown that the top of the main cloud layer is lower in the polar regions than elsewhere.
When Voyager 1 obtained these images it was less than 1 degree south of Jupiter's equatorial plane, while the oval is located near latitude 60°S. This makes the oval highly foreshortened; in reality it is much closer to a circular shape than the images above suggest. These images were acquired at a distance of ~930,000 kilometers from Jupiter's center at a resolution of ~9 km/pixel. Color, contrast, and sharpness have been enhanced to better show various details. NASA / JPL-Caltech / Björn Jónsson
