PIA09239: Io and Ganymede

Io and Ganymede


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.

Cataloging Keywords:

Name Value Additional Values
Target Jupiter Earth, Ganymede, Io, Mercury
System Jupiter Earth
Target Type Planet Earth, Satellite
Mission New Horizons
Instrument Host New Horizons
Host Type Flyby Spacecraft
Instrument Long Range Reconnaissance Imager (LORRI)
Extra Keywords Grayscale, Shadow, Visual, Volcano
Acquisition Date
Release Date 2007-04-02
Date in Caption 2007-01-17
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Source photojournal.jpl.nasa.gov/catalog/PIA09239
Identifier PIA09239