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

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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 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. It was launched, along with the Australian Optus D3 satellite, by Arianespace. An Ariane 5ECA rocket was used for the launch, which occurred from ELA-3 at the

Guiana Space Centre The Guiana Space Centre (; CSG), also called Europe's Spaceport, is a spaceport to the northwest of Kourou in French Guiana, an Overseas departments and regions of France, overseas region of France in South America. Kourou is located approxim ...

in Kourou, French Guiana. The launch took place at 22:09 GMT on 21 August 2009, at the start of a 60-minute launch window. JCSAT-12 separated from its carrier rocket into a geosynchronous transfer orbit, from which raise itself to geostationary orbit using a LEROS-1C apogee motor. It has a design life of fifteen years, and carries forty two transponders; twelve G/H band, and thirty J band (US IEEE C and Ku bands respectively).

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{{DEFAULTSORT:Jcsat-12 Spacecraft launched in 2009 Satellites using the A2100 bus Communications satellites of Japan Satellites of Japan

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