ISRO will perform the final manoeuvre to inject Aditya-L1 spacecraft into its final destination orbit at around 4pm on Saturday, the space agency has announced. The first space-based Indian observatory to study the Sun will be placed in a halo orbit around Lagrange point 1 (L1) of the Sun-Earth system, according to ISRO.ISRO will perform the final manoeuvre to inject Aditya-L1 spacecraft into its final destination orbit at around 4pm on Saturday, the space agency has announced. The first space-based Indian observatory to study the Sun will be placed in a halo orbit around Lagrange point 1 (L1) of the Sun-Earth system, according to ISRO.