| Astra 1C | |
| Mission Type: | Communications |
| Operator: | SES |
| Cospar Id: | 1993-031A |
| Satcat: | 22653 |
| Website: | https://www.ses.com/ |
| Mission Duration: | 12 years (planned) 18 years (achieved) |
| Spacecraft Type: | Boeing 601 |
| Spacecraft Bus: | HS-601 |
| Manufacturer: | Hughes Space and Communications |
| Power: | 3.5 kW |
| Launch Date: | 12 May 1993, 00:56:32 UTC |
| Launch Rocket: | Ariane 42L (V56) |
| Launch Site: | Centre Spatial Guyanais, ELA-2 |
| Launch Contractor: | Arianespace |
| Entered Service: | July 1993 |
| Disposal Type: | Graveyard orbit |
| Deactivated: | 2015 |
| Orbit Reference: | Geocentric orbit[1] |
| Orbit Regime: | Geostationary orbit |
| Orbit Longitude: | Astra 19.2°E (1993-2006) Astra 5°E (2007-2008) 2°E (2008-2011) 73°W (2014) 1.2°W (2014) 152°W (2014) 40°W (2014-2015) |
| Apsis: | gee |
| Trans Band: | 18 (+6) Ku-band |
| Trans Bandwidth: | 26 MHz |
| Trans Coverage: | Europe |
| Programme: | Astra constellation |
| Previous Mission: | Astra 1B |
| Next Mission: | Astra 1D |
Astra 1C was a geostationary communications satellite launched in 1993 by SES. The satellite remained in service until 2011 and is now derelict.
Astra 1C was the third communications satellite placed in orbit by SES, and was originally deployed at the Astra 19.2°E orbital position.[2]
The satellite was intended to be replaced in 2002, along with Astra 1B, by Astra 1K but this satellite failed to reach its intended orbit. It was eventually relieved of its remaining television/radio payloads by Astra 1KR in 2006.[3]
In November 2006, prior to the launch of Astra 1L to the 19.2° East position, Astra 1C was placed in an inclined orbit and moved first to 2.0° East for tests, and then in February 2007 to 4.6° East, notionally part of the Astra 5°E cluster of satellites[4] but largely unused.
After November 2008, the satellite operated back at 2.0° East,[5] in an inclined orbit. On 2 November 2011, the satellite was taken out of use as Eutelsat, the rightholder for the 3° allocation, came on air with Eutelsat 3A and current rules ask for a minimum of 2° separation. In the summer of 2014, the satellite was moved to 73° West, close to SES' AMC-6 satellite,[6] to 1.2° West,[7] to 152° West,[8] and to 40° West next to SES-6.[9] From January 2015, it was continuously moving west by approximately 5.2° per day.[10]