April 4, 2019 – The launch took place on Thursday, April 4, at 2:03 pm (local time) from the Guiana Space Center (CSG), Europe’s Spaceport in French Guiana (South America). This was the fifth O3b mission by Arianespace, which has now orbited all 20 satellites in the first phase of this medium Earth orbit (MEO) constellation. Arianespace has launched a total of 61 satellites overall for SES since 1988, both geostationary and non-geostationary. With this fourth successful launch of the year, and the second Soyuz mission for constellations in 2019, Arianespace continues to prove that its family of launchers is perfectly suited to all types of missions into all orbits.