Chandrayaan - I has successfully entered into the Lunar Orbit today at around 5 pm IST.
Chandrayaan - I was launched on October 22nd, 2008. After its launch the space craft was put into the Earth's orbit, taking an elliptical path of 22,860 km as apogee (farthest point from the Surface of the Earth) and 255 km as perigee (nearest point from the Surface of the Earth). Since then the space craft was propelled, increasing its distance from Earth and nearing the Moon. Its final orbit around the Earth had an apogee of 3,84,000 km and perigee of 1,019 km until Lunar Orbit Insertion (LOI) started at around 5 pm for about 800 secs.
LOI is when a space craft is propelled so that it shifts from Earth's Orbit to the Lunar Orbit. At LOI the Earth and the Moon's gravitational force are almost equal. LOI is always a danger since even a small deviation by the space craft would make it crash into the Moon's surface or the Earth's surface or out into the deep space. Experts recall that about 30% of the unmanned moon missions by NASA and Soviet Union have failed during LOI.
Chandrayaan, after completing LOI at around 5:15 pm, is now making an elliptical orbit around the Moon with 7,500 km as aposelene (farthest point from the Surface of the Moon) and 500 km as pericelene (nearest point from the Surface of the Moon). Chandrayaan will further reduce its distance from the Moon to merely about 100 km. This may probably happen on November 14th or 15th.