ESA and NASA are mounting a joint campaign to observe Jupiter over the next few weeks with two different spacecraft. Rosetta will watch the big picture from its current position near Mars, whilst New Horizons will take close-up data as it speeds past the largest planet in our Solar System on its journey to Pluto.

https://www.esa.int/Science_Exploration/Space_Science/Rosetta/Rosetta_teams_up_with_New_Horizons