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Chang'e 1 completes 2nd braking, closer to final orbit
6/11/2007 11:59

China's first lunar probe, Chang'e 1, completed its second braking this morning, which further decelerated the satellite to get it closer to its final orbit.

Chang'e 1, following the instructions of the Beijing Aerospace Control Center (BACC), started the second braking at 11:21am and entered a 3.5-hour orbit with a perilune of around 200 km and an apolune of 1,700 km at around 11:35am after completing the braking.

The probe is expected to brake for the third time at around 8:00am on Nov. 7, which will further slow down its speed to 1.59 km per second to put it on a 127-minute round polar circular orbit.

The round orbit is also the probe's final destination where it is supposed to start "working" formally.

Before the second braking, Chang'e 1 was traveling along a 12-hour elliptical moon orbit, with a perilune of about 210 km and an apolune of about 8,600 km.

Chang'e 1 successfully completed its first braking and entered the moon's orbit at around 11:37am yesterday, which made it become a "real" circumlunar satellite.

The probe, named after a legendary Chinese goddess who flew to the moon, blasted off on a Long March 3A carrier rocket on Oct. 24 from the Xichang Satellite Launch Center in southwestern Sichuan Province.



Xinhua