PIA09239: Io and Ganymede
Target Name: Jupiter
Is a satellite of: Sol (our sun)
Mission: New Horizons
Spacecraft: New Horizons
Instrument: LORRI
Product Size: 899 x 596 pixels (width x height)
Produced By: Johns Hopkins University/APL
Full-Res TIFF: PIA09239.tif (536.6 kB)
Full-Res JPEG: PIA09239.jpg (27.77 kB)

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Original Caption Released with Image:

The New Horizons Long Range Reconnaissance Imager (LORRI) took this 4-millisecond exposure of Jupiter and two of its moons at 01:41:04 UTC on January 17, 2007. The spacecraft was 68.5 million kilometers (42.5 million miles) from Jupiter, closing in on the giant planet at 41,500 miles (66,790 kilometers) per hour. The volcanic moon Io is the closest planet to the right of Jupiter; the icy moon Ganymede is to Io's right. The shadows of each satellite are visible atop Jupiter's clouds; Ganymede's shadow is draped over Jupiter's northwestern limb.

Ganymede's average orbit distance from Jupiter is about 1.07 million kilometers (620,000 miles); Io's is 422,000 kilometers (262,000 miles). Both Io and Ganymede are larger than Earth's moon; Ganymede is larger than the planet Mercury.

Image Credit:
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

Image Addition Date:
2007-04-02