China's first lunar probe Chang'e-1 completed its first orbital transfer
Thursday afternoon, another key move in its 380,000-km journey to
the moon.
The orbital transfer began at 5:55 PM and succeeded after 130
seconds. The probe was transferred into an orbit with a perigee of
about 600 km, 400 km up from the former 200-km perigee, according
to the Beijing Aerospace Control Center (BACC).
Chang'e-1, named after a mythical Chinese goddess who, according
to legend, flew to the moon, blasted off on a Long March3A carrier
rocket at 6:05 PM on Wednesday from the Xichang Satellite Launch
Center in the southwestern province of Sichuan.
The circumlunar satellite will experience another three
accelerations, which will further shorten its distance to the moon
orbit, Zhou said.
The probe will complete its second orbital transfer on Friday,
in which it will enter a 24-hour trajectory and orbit the earth
along the new trajectory for three days.
It is expected to enter its earth-moon transfer orbit on Oct. 31
and enter the moon's orbit on Nov. 5.
The 2,300-kg moon orbiter carried eight probing facilities,
including a stereo camera and interferometer, an imager and
gamma/x-ray spectrometer, a laser altimeter, a microwave detector,
a high energy solar particle detector and a low energy ion
detector.
It will fulfill four scientific objectives: conduct a
three-dimensional survey of the Moon's surface; conduct an analysis
of the abundance and distribution of elements on lunar surface;
conduct an investigation of the characteristics of lunar regolith
and the powdery soil layer on the surface; conduct an exploration
of the circumstance between the earth and the moon.
The satellite will relay the first picture of the moon in late
November and will then continue scientific explorations of the moon
for a year.
To date China's lunar orbiter project has cost 1.4 billion yuan
(US$133 to 187 million) since research and development of the
project was approved at the beginning of 2004.
The launch of the orbiter marks the first step of China's
three-stage moon mission, which will lead to a moon landing and
launch of a moon rover at around 2012.
In the third phase, another rover will land on the moon and
return to earth with lunar soil and stone samples for scientific
research around 2017.
China carried out its maiden manned space flight in October
2003, making it only the third country in the world after the
Soviet Union and the United States to have sent men into space. In
October 2005, China completed its second manned space flight, with
two astronauts on board.
Japan launched its first lunar probe, nicknamed Kaguya after a
moon princess in an ancient Japanese folktale, in mid-September,
and India is planning to send its own lunar probe into space next
April.
But Luan Enjie, chief commander of China's lunar orbiter
project, said: "China is not involved in a moon race with any other
country in any form."
"China will, in the principle of pursuing the policy of peaceful
use of airspace, share the achievements of the lunar exploration
with the whole world," he told Xinhua.
(Xinhua News Agency October 26, 2007)