Hacker News new | ask | show | jobs
by ncmncm 2491 days ago
You have to imagine the eccentric orbit, 114 km perigee on the far side and a long wait going out to 18k km, toward and away from Earth, looping past the moon's poles.

Over time the eccentric orbit will swing away from pointing at Earth. They will do burns at perigee and the eccentricity will gradually contract until the orbit is about circular. After a week it has Earth in view full- time, a good time to do the final burns; after 2 weeks it has swung around to going behind the moon again, still going over the poles. They will land during the first period when the orbiter is in view full-time.

Congratulations to everyone from India. This has to be a proud moment.

1 comments

Actually I was wrong about the initial and later direction of the orbit axis. It started with the orbiter swinging way to the left, as seen from earth (axis pointing at us), and is rotating now to be behind the moon, most of the time, come early next week, and in sight when it needs to do burns to circularize its orbit. By the time it lands, the orbit should have swung further and be coming up close to its axis pointing not too far from us, again. It should be in line of sight most of the time, by then.