|Operator||Gazprom Space Systems|
|Mission duration||15 years (planned)|
6 years, 4 months and 25 days (in progress)
|Manufacturer||ISS Reshetnev (bus)|
Thales Alenia Space (payload)
|Launch mass||2,976 kg (6,561 lb)|
|Start of mission|
|Launch date||15 December 2014,|
|Rocket||Proton-M / Briz-M|
|Launch site||Baikonur, Site 81/24|
|Contractor||Khrunichev State Research and Production Space Center|
|Entered service||February 2015|
|Reference system||Geocentric orbit |
Yamal-401 (Russian: Ямал-401) is a Russian geostationary communications satellite operated by Gazprom Space Systems. It was built by ISS Reshetnev and is based on the Ekspress-2000 satellite bus. It is equipped with 17 C-band and 36 Ku-band transponders. It has a design life of 15 years.
In February 2009, Gazprom ordered two Yamal-400 type satellites from Thales Alenia Space. The satellites were name Yamal-401 and Yamal-402. Thales Alenia Space was to be responsible for all aspects of the development and building of the satellites. Both satellites were to be based on Spacebus4000C3 satellite buses.
However, in 2010, Gazprom changed their satellite order so that the Yamal-401 satellite would be developed by ISS Reshetnev and be based on their Ekspress-2000 satellite bus. Thales Alenia Space would deliver the payload for Yamal-401 as originally agreed (also, no changes on the payload side of things). There were no changes with the Yamal-402 satellite, with Thales Alenia developing and building the whole satellite as originally planned.
International Launch Services (ILS) was contracted to launch Yamal-401, using a Proton-M / Briz-M launch vehicle. The launch took place from Site 81/24 at the Baikonur Cosmodrome, at 00:16:00 UTC on 15 December 2014. The satellite was deployed into the planned geostationary transfer orbit (GTO).