| Eutelsat 16C | |
| Names List: | SESAT-1 (2000–2012) Eutelsat 16C (2012–2018) Eutelsat SESAT |
| Mission Type: | Communications |
| Operator: | Eutelsat Communications |
| Cospar Id: | 2000-019A |
| Satcat: | 26243 |
| Website: | https://www.eutelsat.com/en/home.html |
| Mission Duration: | 10 years (planned) 17.8 years (achieved) |
| Spacecraft: | SESAT-1 |
| Spacecraft Type: | KAUR |
| Spacecraft Bus: | MSS-2500-GSO |
| Manufacturer: | NPO PM Alcatel Alenia Space |
| Power: | 5.6 kW[1] |
| Launch Date: | 17 April 2000, 21:06:00 UTC |
| Launch Rocket: | Proton-K / DM-2M |
| Launch Site: | Baikonur, Site 200/39 |
| Launch Contractor: | Khrunichev State Research and Production Space Center |
| Entered Service: | June 2000 |
| Disposal Type: | Graveyard orbit |
| Deactivated: | 13 February 2018 |
| Orbit Reference: | Geocentric orbit |
| Orbit Regime: | Geostationary orbit |
| Orbit Longitude: | 36° East (2000–2010) 16° East (2010–2018) |
| Apsis: | gee |
| Trans Band: | 18 Ku-band |
| Trans Bandwidth: | 72 MHz |
| Trans Coverage: | Europe, Africa, Russia |
| Programme: | Eutelsat constellation |
| Previous Mission: | Eutelsat W4 |
| Next Mission: | Eutelsat W1 |
Eutelsat 16C (formerly SESAT 1) was a satellite operated by Eutelsat Communications, originally the first of a series of SESAT (Siberia - Europe SATellite) satellites. It provided a wide range of telecommunications services over a very large geographical coverage area that extends from the Atlantic Ocean to Eastern Russia, including a large part of Siberia. The satellite also provided broadcasting services to Africa by means of steerable spotbeams.[2]
On 29 January 2010, the satellite moved to 16° East to take over some services from the malfunctioning Eutelsat W2 satellite. The satellite was deactivated on 13 February 2018, after 17 years and 10 months of service, setting a record for in-orbit life.[3]