Mike’s Tweets

LADEE in Lunar Orbit

The LADEE spacecraft is now in Lunar orbit. Tracking data will later confirm the precise parameters of the orbit, but based on telemetry of thruster performance and accelerations, the LOI-1 burn appears to be close to nominal.

The planned Lunar orbit has an orbit period of 23.1 hrs. The next planned maneuver (Lunar Aposelene Maneuver […]

LADEE Update: 15 min to LOI

 

 

 

 

 

 

LADEE Update: 30 min to LOI

 

 

1.5 hrs to LOI

 

 

5.5 Hrs to LOI

 

 

LADEE Lunar Orbit Insertion 1 (LOI-1)

Watch the Lunar Orbit Period and Lunar Apoapsis Altitude come down once the Lunar Eccentricity goes below 1.0 (from Hyperbolic to Elliptical).

LADEE Now in the Moon’s Sphere

The Moon is now under control. Based on LADEE’s altitude (below 66,000 km) the Moon is now the primary gravitational body acting on the spacecraft. In other words, the Moon’s gravity is now stronger than the Earth’s.

 

 

This picture really shows the change the Moon is imposing on the orbit, which until […]

Switching to the Moon’s gravity

This figure, created a few days ago, shows the Earth- and Moon-centered orbit estimates. It also shows the uncertainty in these estimates. The uncertainty is very small, although it’s hard to see the scale in this picture since we zoomed in to show it. The uncertainty is shown as a 3 dimensional region in […]