Jupiter in 2019, Report no.4
This report covers activity on Jupiter up to early May. It includes:
–A zonal wind profile made by Marco Vedovato from amateur images on 2019 April 19-21.
–Maps of the planet in April, and images of the EZ during Juno’s fly-over at Perijove-19.
–Detailed coverage of the action around the GRS, where incoming ring-shaped vortices on the SEBs jet have been causing red ‘flakes’ to detach from the f. end of the GRS, and now also from its p. end. Recently a strikingly dark grey collar has also formed around the GRS. Links to animations are given, and a summary of past history of such red flakes.
–Tracking the STB Spectre, which has grown to ~70 deg long, in methane images; its p. end has now arrived alongside the GRS.
The text of the report is here (PDF): JupLet 2019cc_Report-no4.pdf
Miniatures of the figures are here (PDF): Report-no4_Figures.pdf
The full-size figures are here (ZIP): Jup-2019_Report-no4_Figures.zip
Two animations of maps of the GRS activity (north up, south up) are here:
A labelled map of the planet is below.