Eutelsat 4A

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Eutelsat 4A
Names Orion 2 (pre-launch)
RESSAT (pre-launch)
Eutelsat W1 (2000-09)
Eurobird 4A (2009-12)
Eutelsat 4A (2012—)
Mission type Communications
Operator Eutelsat
COSPAR ID 2000-052A
SATCAT № 26487
Mission duration 12 years
Spacecraft properties
Bus Eurostar-2000+
Manufacturer Astrium
Launch mass 3,250 kilograms (7,170 lb)
Start of mission
Launch date 6 September 2000, 22:33 (2000-09-06UTC22:33Z) UTC
Rocket Ariane 44P-3
Launch site Kourou ELA-2
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime Geosynchronous
Longitude 2000-2009: 10° East
2009— : 4° East

Eutelsat 4A, previously Eurobird 4A and Eutelsat W1 [1] is a French communications satellite which is operated by Eutelsat. It was constructed by Astrium is based on the Eurostar-2000+ satellite bus. Its launch was contracted by Arianespace, using an Ariane 4 44P-3 carrier rocket. The launch occurred on 6 September 2000, at 22:33 UTC from ELA-2 at the Guiana Space Centre.

It was originally built as Orion 2 for Orion Network Systems. This was later cancelled when Orion merged with Loral Skynet, who opted to procure satellites from their sister company, Space Systems Loral. It was subsequently sold to Eutelsat as a backup satellite and designated RESSAT. It was subsequently launched in place of the original Eutelsat W1, which was damaged whilst under construction and eventually launched as Eutelsat W5.[1]

Following its launch and on-orbit testing, it was placed in geostationary orbit at 10° East, from where it provided broadcast and communications services to Europe using wide-band feeds. In June 2009, it was moved to 4° East,[2] and redesignated Eurobird 4A. It carries twenty eight transponders, and has an expected on-orbit lifespan of 12 years.

In 2012 it was renamed Eutelsat 4A.[2]


  1. 1.0 1.1 "Eurobird 4A". Satellite fleet. Eutelsat. Retrieved 2009-06-11.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. 2.0 2.1 Krebs, Gunter. "Eutelsat W4". Gunter's Space Page. Retrieved 2009-05-02.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>