PIA01368: Jupiter's Moon Io
Target Name: Io
Is a satellite of: Jupiter
Mission: Voyager
Spacecraft: Voyager 1
Instrument: VG ISS - Narrow Angle
Product Size: 600 x 600 pixels (width x height)
Produced By: JPL
Producer ID: P21334
Addition Date: 1998-12-05
Primary Data Set: Voyager EDRs
Full-Res TIFF: PIA01368.tif (736.2 kB)
Full-Res JPEG: PIA01368.jpg (138.3 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

This picture shows a special color reconstruction of one of the erupting volcanos on Io discovered by Voyager 1 during its encounter with Jupiter on the 4th and 5th of March. The picture was taken March 4 about 5:00 p.m. from a range of about half a million kilometers showing an eruption region on the horizon. This method of color analysis allows scientists to combine data from four pictures, taken in ultraviolet, blue, green and orange light. In this picture one can see the strong change in color of the erupting plume. The region that is brighter in ultraviolet light (blue in this image) is much more extensive than the denser, bright yellow region near the center of the eruption. Scientists will use data of this type to study the amount of gas and dust in the eruption and the size of dust particles. Preliminary analysis suggests that the bright ultraviolet part of the cloud may be due to scattered light from very fine particles (the same effect which makes smoke appear bluish).

Image Credit:
NASA/JPL

Image Addition Date:
1998-12-05