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OFFICE OF PUBLIC INFORMATION
JET PROPULSION LABORATORY, CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIFORNIA. TELEPHONE 354-5011
FOR RELEASE: WEDNESDAY, AUGUST 25, 1971
The Mariner 9 spacecraft will complete its 87th day of
travel today having covered 140,000,000 miles on its 247 million
mile journey to Mars since launch on May 30.
The 2200 pound spacecraft is 20,000,000 miles from
Earth as it slowly draws away from Earth towards the orbit of
Mars. It is traveling on a curving path around the Sun at 61,000
miles per hour relative to the Sun.
The previous abnormal high rate of usage of the
nitrogen gas in the attitude control subsystem has stabilized to
a normal 4 to 6 milli-pounds per day. There is sufficient gas to
allow orbital operations of one year if an extended mission,
beyond the basic 90 day mission, is funded.
On November 13th the flight path of Mariner 9 will
intersect the orbital path of Mars and the firing of a 300 pound
thrust retro engine will insert Mariner into a Mars orbit.
Basic objective of the mission is 90 days in orbit and
mapping of about 70% of the Martian surface with two television
cameras. Other experiments will record atmospheric and surface
data.
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8/25/71 #591