Optus D3 is an Australian geostationary communications satellite, which is operated by Optus and provides communications services to Australasia.

[2] It was launched, along with the Japanese JCSAT-12 satellite, by Arianespace.

An Ariane 5ECA rocket was used for the launch, which occurred from ELA-3 at the Guiana Space Centre in Kourou, French Guiana.

[3] Optus D3 separated from its carrier rocket into a geosynchronous transfer orbit, from which it raised itself to geostationary orbit using an IHI -500-N apogee motor.

It has a design life of fifteen years, and carries thirty two J band transponders (US IEEE Ku band).