|Mission duration||16 years (planned)|
|Manufacturer||Alcatel Alenia Space|
|Launch mass||4,953 kilograms (10,919 lb)|
|Dry mass||2,286 kilograms (5,040 lb)|
|Start of mission|
|Launch date||03 February 2005, 03:27UTC|
|Launch site||Baikonur 81/24|
|Semi-major axis||42,241.0 kilometres (26,247.3 mi)|
|Perigee altitude||35,857.0 kilometres (22,280.5 mi)|
|Apogee altitude||35,883.2 kilometres (22,296.8 mi)|
|Band||72 IEEE C-band)|
Star One C12 (also called as NSS-10, Worldsat 2, AMC-12, GE-1I and Astra 4A) is a communications satellite operated by SES S.A with headquarters in Luxembourg. It was built by Thales Alenia Space based on the Spacebus-4000C3 satellite bus, and was launched on 3 February 2005 03:27 UTC by a Proton-M carrier rocket.
The start mass was 4953 kg.