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hst_impact_a.txt
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1995-03-09
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HUBBLE IMAGE OF COMET SHOEMAKER-LEVY
FIRST FRAGMENT IMPACT WITH JUPITER
This image of Jupiter's cloudtops was taken at 5:32 EDT on July
July 16, shortly after the impact of the first fragment (A) of
Comet Shoemaker-Levy 9. A violet (410 nanometer) filter of the
Wide Field Planetary Camera 2 of NASA's Hubble Space Telescope
was used to make the image 1.5 hours after the impact.
The impact site is visible as a dark streak and crescent-shaped
feature, several thousand kilometers in size, in the lower left
of the image. The comet entered the atmosphere from the south in
the direction of the streak at an angle of about 45 degrees from
the vertical. The crescent-shaped feature may be the remains of
the plume that was ejected back along the entry path of the
projectile. The features are probably dark particles from the
comet, or possibly condensates dredged up from Jupiter's deep
atmosphere.
Comet Shoemaker-Levy 9 broke up during a close passage by Jupiter
in July of 1992. The fragments will continue to impact the planet
through 22 July 1994. Pre-encounter estimates of the energy of
the combined impacts are highly uncertain, and range up to that
of a million hydrogen bombs (a million megatons of TNT).
Jupiter was approximately 477 million miles (767 million
kilometers) from Earth when the image was taken.
Credit: H. Hammel, MIT
and NASA