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The colors of Jupiter in 2022 (2) North-South scans and color indices by Christophe.P
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Here is the second part of the work!
In 2022, several important color moves have been observed on Jupiter, the most important ones being:
- The brightening of the EZ, that has past from deep orange to yellow.
Its albedo rised from 45% to more than 60% in blue light.
However, last year it still did not reached its brighter state (this could be for the coming apparition, by looking at the first images).
The change is also important in that region on the B/U color index,
which is nice to detect special "red" coloration events,
but not so in CH4 (although a slight dimming is maybe observed).
- The brigtening of the NTB ("fade")
- And a large darkening and reddening of all equatorial,
tropical and first temperate south latitudes (EZ, NTrZ, STB somewhere)
But other changes can be observed. Inspired by the Jupiter work performed by Antonio Cidadao,
Steve Hill and Barry Adcock, I have begun to play with images math operation and you can find one here.
The substraction of equatorial strip maps from the two years,
on psf-processed and LD compensated images is producing a nice binary color code for both albedo changes and color shifts.
All scans display the previous value from 2021 in dashed line.
Not a surprise, you can see that the changes are becoming gradually muted when the wavelength increases,
and they become almost undectable in infrared.
I have added a CH4 profile including the GRS.
There will be more to discuss on the color of the GRS but this will be for the next message,
that will send the photometric spectra of some individual features or regions.
 ALPO-Japan Latest Jupiter Section
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