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Enhanced Early View of Ceres from Dawn

Dec 05, 2014
As NASA's Dawn spacecraft flies through space toward the dwarf planet Ceres, the unexplored world appears to its camera as a bright light in the distance, full of possibility for scientific discovery.

As the Dawn spacecraft flies through space toward the dwarf planet Ceres, the unexplored world appears to its camera as a bright light in the distance, full of possibility for scientific discovery.

This view was acquired as part of a final calibration of the science camera before Dawn's arrival at Ceres. To accomplish this, the camera needed to take pictures of a target that appears just a few pixels across. On Dec. 1, 2014, Ceres was about nine pixels in diameter, nearly perfect for this calibration. The images provide data on very subtle optical properties of the camera that scientists will use when they analyze and interpret the details of some of the pictures returned from orbit.

Ceres is the bright spot in the center of the image. Because the dwarf planet is much brighter than the stars in the background, the camera team selected a long exposure time to make the stars visible. The long exposure made Ceres appear overexposed, and exaggerated its size; this was corrected by superimposing a shorter exposure of the dwarf planet in the center of the image.

A cropped, magnified view of Ceres appears in the inset image at lower left.

The image was taken on Dec. 1, 2014 with the Dawn spacecraft's framing camera, using a clear spectral filter. Dawn was about 740,000 miles (1.2 million kilometers) from Ceres at the time. Ceres is 590 miles (950 kilometers) across and was discovered in 1801.

The Dawn mission to Vesta and Ceres is managed by NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, for NASA's Science Mission Directorate, Washington D.C. UCLA is responsible for overall Dawn mission science. The Dawn framing cameras were developed and built under the leadership of the Max Planck Institute for Solar System Research, Göttingen, Germany, with significant contributions by DLR German Aerospace Center, Institute of Planetary Research, Berlin, and in coordination with the Institute of Computer and Communication Network Engineering, Braunschweig. The Framing Camera project is funded by the Max Planck Society, DLR, and NASA/JPL.

More information about Dawn is online at http://www.nasa.gov/dawn.

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Mission
  • Dawn
Target
  • Ceres
Spacecraft
  • Dawn
Instrument
  • Framing Camera
Credit
NASA/JPL-Caltech/UCLA/MPS/DLR/IDA

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Dawn Stereo Anaglyph of Hydrothermal Deposits at Occator Crater, Ceres

Dawn Stereo Anaglyph of Southeast Floor and Rim of Occator Crater, Ceres

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Stars on Occator's Floor

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