The Chang 'e-1 probe was successfully launched by the Long March 3A carrier rocket from xichang satellite launch center at 20071October 24th 18: 05 Beijing time. After the satellite is launched, it takes 8 to 9 days to complete the phase modulation orbit, the earth-moon transfer orbit and the orbit around the moon. After eight orbit changes, it officially entered the working track on165438+10.7. 165438+1October 18, the satellite turned to the moon orientation attitude,165438+1October 20th, and the detection data began to be transmitted back.
When circling the earth:
16 hour orbit: orbit inclination is 3 1 degree, perigee is 200 kilometers, and apogee is 5 1000 kilometers.
24-hour orbit: perigee 600 km, apogee 7 1000 km.
48-hour orbit: apogee altitude 137000 km,
Try to calculate the time around the earth: 16 hour orbit, 24 hour orbit.