Question: when does the james webb space telescope launch
Answer: 46 ft ) ( sunshield ) Power 2,000 watts Start of mission Launch date Spring 2019 Rocket Ariane 5 ECA Launch site Kourou ELA - 3 Contractor Arianespace Orbital parameters Reference system Sun -- Earth L Regime Halo orbit Periapsis 374,000 km ( 232,000 mi ) Apoapsis 1,500,000 km ( 930,000 mi ) Period 6 months Epoch planned Main Type Korsch telescope Diameter 6.