Juno Mission To JupiterNASA New Frontiers Program

Launch Date: Aug. 5, 11:34 a.m. EDTLaunch Period: Aug. 5 – 26 (~60 min window)Launch Vehicle: Atlas V-551 – ULA DenverLaunch Site: Cape Canaveral NASA: Jet Propulsion Laboratory Principal Investigator : Southwest Research Institute Co-Investigator : University of Colorado Spacecraft: Lockheed Martin Denver

Launch Date: Aug. 5, 11:34 a.m. EDTLaunch Period: Aug. 5 – 26 (~60 min window)Launch Vehicle: Atlas V-551 – ULA DenverLaunch Site: Cape Canaveral NASA: Jet Propulsion Laboratory Principal Investigator : Southwest Research Institute Co-Investigator : University of Colorado Spacecraft: Lockheed Martin Denver

Atlas V 551New Horizons

Jupiter

• 484 million miles from Sun (receives ~4% the solar energy)• 9.9 hour day, Jovian year is ~11.9 Earth years• 318 times as massive as Earth• 1,400 more volume, 88,846 miles in diameter• ¼ as Dense (1.33 times water)• 63 moons +• Centuries old Great Red Spot• Largest planetary magnetic field • Radiates more heat than it receives from the Sun• Atmosphere 90% hydrogen, 10% helium; traces of methane,

ammonia, water, ethane, ice• Visited by Pioneers, Voyagers, Cassini, New Horizons• Orbited by Galileo with an atmospheric probe

• 484 million miles from Sun (receives ~4% the solar energy)• 9.9 hour day, Jovian year is ~11.9 Earth years• 318 times as massive as Earth• 1,400 more volume, 88,846 miles in diameter• ¼ as Dense (1.33 times water)• 63 moons +• Centuries old Great Red Spot• Largest planetary magnetic field • Radiates more heat than it receives from the Sun• Atmosphere 90% hydrogen, 10% helium; traces of methane,

ammonia, water, ethane, ice• Visited by Pioneers, Voyagers, Cassini, New Horizons• Orbited by Galileo with an atmospheric probe

Trajectory & Science• Five-year cruise to Jupiter, arriving July 2016• Deep Space Maneuver (DSM): 2, 33 min Engine Burns • Earth Fly-by Gravity Assist• Jupiter polar orbit for about one year

– 33 orbits, (11 day period)– Galileo plan was 2 years, lasted 8 years

• Mission ends with de-orbit into Jupiter – Same as Galileo (protect Moons)

• 9 Experiments, 25 Sensors• Color camera - Junocam

– First detailed glimpse of the Jupiter's poles.– 9.3 mile/pixel resolution – Education & Public Outreach

Spacecraft Overview•Spacecraft Mass 7992 pounds, 4 tons

– Larger and more propellant than Galileo with its probe•3 Solar Arrays 8.7 feet x 29.5 feet, total area 650 ft2

– 15 kilowatts at Earth, 450 watts at Jupiter (3-4%)– 50% more efficient then 20 years ago– All previous Jupiter “visits” used Plutonium RTGs

•Spin-stabilized 3 rpm, like Pioneer for pointing and control– Keeps pointed towards Sun

•Propulsion – Bi-propellant system, 4400 lb, 2 tons– 145 lbf thrust main engine with a protective cover

•Titanium “Vault” to protect Electronics from Magnetic field– Weights 157 kg (346 lb)– Shields from electrons and protons– Testing difficult due to vacuum,

LN2 temperatures and high energy particles

– Exposure • ~100 million Dental X-rays

Propulsion System& Ti Vault In Denver

Spacecraft Vacuum Test in Denver