Jupiter in Extended Spectrum
I'm torturing Jupiter again with strange filter combinations. This one combines near-infrared, visible green, and near-ultraviolet light. Shorter wavelengths are scattered along the equatorial regions, appearing as a ghostly blue glow. Longer wavelengths are more prominent at the poles, causing them to glow red. I remain unsure if this is scattering or emission, though I am leaning towards atmospheric scattering. A more familiar example is our planet Earth, which itself can appear slightly blue at its limb.
The Great Red Spot appears intensely red as it was relatively dark in both visible and near-uv wavelengths. Ahead of the GRS, nearly centered on the southern hemisphere, is Red Spot Junior.
Io appears at the upper right as a fiercely glowing red dot. Io is much brighter than Jupiter itself at this particular band of near-infrared, and it was bright enough this time to have saturated (turned 100% white) the sensor, destroying some details.
This image represents Jupiter as it appeared on 2017 Feb 02 at 03:00:20 UTC.
Observations from the following proposal were used to create this image:
Red: WFC3 UVIS FQ889N
Green: WFC3 UVIS F502N
Blue-Cyan: WFC3 UVIS F275W
North is up.