The Indian Space Research Organisation (ISRO) is now looking forward to two key dates-- December 1, when the MOM spacecraft leaves the earth's sphere of influence and September 24 next year, when it's captured by Martian orbit. The spacecraft launched on Nov 5 would go around the earth for 25 days before the ISRO plans to do trans-Mars injection at 0.42 hours on December 1 enabling it to undertake the long voyage towards the Red planet.