Jupiter Moon Transit, January 24, 2015 (07:10 UT)

Three moons and their shadows parade across Jupiter near the end of the event at 07:10 UT on January 24, 2015. Europa has entered the frame at lower left. Slower-moving Callisto is above and to the right of Europa. Fastest-moving Io is approaching the eastern limb of the planet. Europa's shadow is toward the left side of the image and Callisto's shadow to the right. (The moons' orbital velocities are proportionally slower with increasing distance from the planet.)

About the colours

These images are composites of separate exposures acquired by the WFC3 instrument on the Hubble Space Telescope. Several filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F395N (395 nm) Green: F502N (502 nm) Red: F631N (631 nm)

About the data

The image was created from Hubble data from the following proposal: 14042 PI: Z. Levay (STScI), K. Noll (NASA/GSFC), M. Mutchler, J. Mack, L. Frattare, C. Christian, M. Livio, and S. Meyett (Hubble Heritage Team, STScI/AURA), A. Roman (STScI), A. Simon (NASA/GSFC), M.H. Wong (University of California, Berkeley), and R. Landis (NASA/JSC).