JCSAT-RA, previously known as JCSAT-12, is a Japanese geostationary communications satellite, which is operated by SKY Perfect JSAT Group.

It was ordered to replace the JCSAT-11 satellite which was lost in a launch failure on a Proton-M/Briz-M rocket in 2007, and is currently used as an on-orbit spare satellite; a role in which it replaced the older JCSAT-R spacecraft, providing a reserve for if one of the company's other satellites fails. It is a 4,000-kilogram (8,800 lb) satellite, which was constructed by Lockheed Martin based on the A2100AX satellite bus, with the same configuration as JCSAT-10 and JCSAT-11. The contract to build JCSAT-12 was awarded on 6 September 2007, the day after JCSAT-11 failed to reach orbit.

Optus D3 is an Australian geostationary communications satellite, which is operated by Optus and provides communications services to Australasia. D3 was the third Optus-D satellite to be launched. It is a 2,401-kilogram (5,293 lb) satellite, which was constructed by Orbital Sciences Corporation based on the Star-2.4 satellite bus, with the same configuration as the earlier Optus D2 satellite.