dawn dawn mission. dawn how do we get there? dawn dawn a journey to the beginning of the solar...

Dawn

Dawn

Dawn Mission

Dawn

Dawn

How Do We Get There?

Dawn

Dawn

DAWNA Journey to the Beginning of the Solar System

Vesta

Travel Plans: Dawn’s Itinerary

The Dawn Spacecraft will travel

• 6.3 billion kilometers

• Almost ten years

• To the asteroid 4 Vesta and Dwarf planet 1 Ceres.

Ceres

Dawn

Dawn

Travel Plans: Cross-Country Trip

• A 3000 mile trip from Los Angeles to New York City requires:

• 120 gallons of fuel

–16 cubic feet storage

–adds 685 pounds weight

• 4 days travel time

Dawn

Dawn

A Trip to Mars

• A 35 million mile trip from Earth to Mars requires:

• 900 metric tons of rocket fuel

• 6 months travel time

Dawn

Dawn

Interplanetary Trajectory

Dawn

Dawn

Hydrazine tank

45 kg capacity

Xenon tank

450 kg capacity

Folded solar arraysIon thruster

2.3 meters

Ion Propulsion System

Dawn

Dawn

Thrust vs. Time

To change velocity 1000 m/s using: Type of Propulsion Ion Propulsion Conventional Chemical Mass of propellant 25 kg Xenon 300 kg chemical Time 100 days 20 minutes Thrust 92 mN 500 N