Main Engine Cut Off

Juno Executes Long Burn to Avoid Fatal Eclipse

From the JPL blog:

Juno began the maneuver yesterday, on Sept. 30, at 7:46 p.m. EDT (4:46 p.m. PDT) and completed it early on Oct. 1. Using the spacecraft's reaction-control thrusters, the propulsive maneuver lasted five times longer than any previous use of that system. It changed Juno's orbital velocity by 126 mph (203 kph) and consumed about 160 pounds (73 kilograms) of fuel. Without this maneuver, Juno would have spent 12 hours in transit across Jupiter's shadow - more than enough time to drain the spacecraft's batteries. Without power, and with spacecraft temperatures plummeting, Juno would likely succumb to the cold and be unable to awaken upon exit.

Sounds like the team didn’t predict such a long eclipse before launch. I wonder how much that’s tied to the fact that Juno is in a 53-day orbit rather than the intended 14-day orbit, due to the propulsion failure earlier in the mission.

Nice flying by the Juno team.