PIA00229: Gaspra Optical Navigation Image
 Target Name:  Gaspra
 Is a satellite of:  Sol (our sun)
 Mission:  Galileo
 Spacecraft:  Galileo Orbiter
 Instrument:  Solid-State Imaging 
 Product Size:  810 x 855 pixels (w x h)
 Produced By:  JPL
 Producer ID:  P39433
 Addition Date:  1996-02-08
 Primary Data Set:  Galileo EDRs
 Full-Res TIFF:  PIA00229.tif (204 kB)
 Full-Res JPEG:  PIA00229.jpg (231.3 kB)

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Original Caption Released with Image:

This time-exposure picture of the asteroid Gaspra and background stars is one of four optical navigation images made by Galileo's imaging system to improve knowledge of Gaspra's location for the spacecraft flyby. The 26-second exposure was made October 13, 1991, when Galileo was about 11 million kilometers (7 million miles) from the asteroid. The camera was deliberately slewed about 0.14 degrees to stretch the asteroid and star images into streaks. Information from this and other navigation images was used to design trajectory correction maneuvers to place the spacecraft in the best path for its observations of Gaspra.

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