  Understanding the motion of debris cloud produced by the anti-satellite test
can help us to know the danger of these tests. This study presents the orbit
status of 57 fragments observed by the CelesTrak and presented in the NORAD
Two-Line Element Sets of India Anti-Satellite Test. There are 10 of these
observed fragments have altitudes of the apogee larger than 1000.0km, the
maximum one is 1725.7km. We also numerical calculated the number of debris, the
results show that the number of debris with the diameter larger than 0.2m is
14, the number of debris with the diameter larger than 0.01m is 6587, and the
number of debris with the diameter larger than 0.001m is 7.22e+5. The results
of the secondary collision of the debris will produced more fragments in the
space. The life time of the fragments depends on the initial orbit parameters
and the sizes of the debris.
