| Ekspress-A1 | |
| Names List: | Экспрeсс-А1 Express-A1 Ekspress-6A No.1 |
| Mission Type: | Communication |
| Operator: | Russian Satellite Communications Company (RSCC) |
| Website: | https://eng.rscc.ru/ |
| Mission Duration: | 7 years (planned) Failed to orbit |
| Spacecraft: | Ekspress-A1 |
| Spacecraft Type: | KAUR |
| Spacecraft Bus: | MSS-2500-GSO |
| Manufacturer: | NPO PM (bus) Alcatel Space (payload) |
| Power: | 2540 watts |
| Launch Date: | 27 October 1999, 16:16:00 UTC |
| Launch Site: | Baikonur, Site 200/39 |
| Launch Contractor: | Khrunichev State Research and Production Space Center |
| Entered Service: | Failed to orbit |
| Orbit Reference: | Geocentric orbit (planned) |
| Orbit Regime: | Geostationary orbit |
| Orbit Longitude: | 11° West |
| Apsis: | gee |
| Trans Band: | 17 transponders: 12 C-band 5 Ku-band |
| Trans Coverage: | Russia |
| Insignia Size: | 200px |
| Programme: | Ekspress constellation |
| Previous Mission: | Ekspress-2 |
Ekspress-A1 (ru|Экспрeсс-А1 meaning Express-A1), also designated Ekspress-6A No.1, is a Russian communications satellite which is operated by Russian Satellite Communications Company (RSCC).
It was constructed by NPO Prikladnoi Mekhaniki (ISS Reshetnev) and Alcatel Space and is based on the MSS-2500-GSO satellite bus. It is equipped with seventeen transponders.
The satellite was launched at Baikonur Cosmodrome at Site 200/39 on 27 October 1999, at 16:16:00 UTC. The launch was made by Khrunichev State Research and Production Space Center, and a Proton-K / DM-2 launch vehicle was used.[1] It is part of the Ekspress satellite constellation.
The Russian Ekspress-A1 communications satellite was launched in October 1999 but the Proton-K launch vehicle failed early in flight, during second stage burn. This is the second failure of the 8K82K Proton-K in 1999.[2]