WFPC2 Images of the Icy Galilean Satellites

Details WFPC2 Images of the Icy Galilean Satellites WFPC2 Images of the Icy Galilean Satellites

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.0422g&link_type=abstract

American Astronomical Society, DPS meeting #28, #04.22; Bulletin of the American Astronomical Society, Vol. 28, p.1074

Other

Scientific paper

We have observed Europa, Ganymede and Callisto with the Wide Field Planetary Camera 2 (WFPC2) aboard the Hubble Space Telescope (HST). Images were obtained in six filters ranging from the ultraviolet to the near-infrared (effective wavelengths extend from lambda = 286 nm to lambda = 954 nm). The ultraviolet filters sample wavelengths not observable by either Voyager or Galileo imaging experiments. Observations made with the Planetary Camera have a scale of approximately 150 km per pixel. Leading and trailing hemispheres of each satellite were observed. HST images are compared with Voyager image mosaics projected onto a sphere with Minnaert limb-darkening and convolution to the same resolution as the HST images. Nearly all observed albedo features correspond to features in Voyager images, with a few notable exceptions. Small differences (on the order of 10%) are likely due to errors in the photometric calibration of Voyager mosaics and/or errors in the assumed photometric function for particular regions. The greatest differences between Voyager and HST images occur on Ganymede where HST images show a higher than expected albedo at visible and near-infrared wavelengths over a region extending from about 45deg S to the South pole at 275deg W longitude. Europa at lambda =675 and 954 nm (wavelengths not observed by Voyager) appears nearly featureless, in contrast to its appearance at shorter wavelengths. We compare spectrophotometry of these and other selected regions to search for evidence of compositional effects that may account for these observed differences.

Affiliated with

Also associated with

No associations

Rating

WFPC2 Images of the Icy Galilean Satellites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with WFPC2 Images of the Icy Galilean Satellites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and WFPC2 Images of the Icy Galilean Satellites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1460919