Ariane 5
| Company type | Launch vehicle program |
|---|---|
| Industry | Aerospace |
| Founder | Centre national d'études spatiales (CNES) |
| Fate | Retired |
| Successor | Ariane 6 |
| Headquarters | Kourou , French Guiana |
Area served | Space launch services |
Key people | Daniel Neuenschwander (ESA’s space transportation director) |
| Products | Heavy-lift launch vehicle |
| Owner | European Space Agency (ESA), Arianespace |
| Parent | Arianespace (management) |
Ariane 5 was a European heavy-lift launch vehicle managed by Arianespace on behalf of the European Space Agency (ESA). Operating out of the Guiana Space Centre in French Guiana, it successfully transported payloads to geostationary transfer orbit (GTO), low Earth orbit (LEO), and farther destinations. Between April 2003 and December 2017, Ariane 5 completed 82 consecutive successful launches. Its successor, Ariane 6, had its maiden flight in 2024.
The rocket was developed by France's Centre national d'études spatiales (CNES) in collaboration with European partners and formed part of the Ariane rocket series, although it was not a direct evolution of earlier versions. The main contractor, Aérospatiale (later merged into ArianeGroup), led a multinational consortium involving France, Germany, Italy, Spain, Belgium, Switzerland, and Sweden. Initially engineered to deploy the Hermes crewed spacecraft, Ariane 5 was certified for human spaceflight.
Throughout its service life, Ariane 5 underwent several iterations including "G", "G+", "GS", "ECA", and "ES". It incorporated the SYLDA (Système de Lancement Double Ariane) dual-payload system, allowing the simultaneous launch of two sizable geostationary communication satellites. Smaller satellites could be launched in groups of three using the SPELTRA (Structure Porteuse Externe Lancement Triple Ariane), while up to eight additional secondary payloads were accommodated on an ASAP platform.
Following the August 2020 launch, Arianespace secured contracts for the final eight Ariane 5 flights before fully shifting to Ariane 6 operations, as stated by ESA’s space transportation director Daniel Neuenschwander. The Ariane 5 program concluded with its last mission on 5 July 2023.
Cryogenic main stage
The cryogenic main stage of Ariane 5, designated H173 (with earlier variants H158 for Ariane 5G, G+, and GS), known as the EPC (Étage Principal Cryotechnique), consisted of a tank measuring in diameter and in height. This tank was divided into separate compartments for liquid oxygen and liquid hydrogen. Propulsion was provided by a single Vulcain 2 engine generating thrust in vacuum conditions. The H173 EPC had an approximate mass of , including around of propellant. Upon exhausting its fuel supply, the stage re-entered Earth's atmosphere and descended into the ocean.
Solid boosters
Flanking the main stage were two P241 solid rocket boosters (earlier P238 models used on Ariane 5G and G+), also known as EAPs from French Étages d'Accélération à Poudre. Each booster weighed roughly fully fueled and produced approximately thrust during operation. Their propellant consisted of a composite mixture: ammonium perchlorate (68%), aluminium powder (18%), and hydroxyl-terminated polybutadiene (HTPB) binder (14%). These boosters burned for about 130 seconds before detaching and falling into the sea. Unlike the reusable solid rocket boosters of the Space Shuttle, Ariane 5’s boosters were not recovered for reuse; however, some were retrieved occasionally for inspection—most notably during the first Ariane 5 ECA flight in 2009 when one booster was recovered at Guiana Space Centre for testing purposes.
The technology employed in these boosters shares considerable heritage with the French M51 submarine-launched ballistic missile (SLBM).
In February 2000, a nose cone from an Ariane 5 booster drifted ashore along the South Texas coastline where it was found by local beachgoers prior to official government recovery efforts.
Second stage
Positioned between the main stage and the payload, the second stage of the original Ariane 5G utilized the EPS (Étage à Propergols Stockables — Storable Propellant Stage), which was powered by monomethylhydrazine (MMH) and nitrogen tetroxide, containing a quantity of storable propellants. Subsequent enhancements to the EPS were implemented for the Ariane 5G+, GS, and ES models.
The EPS upper stage was equipped with a restart function, initially trialed during flight V26 on 5 October 2007 after payload separation. Its first operational restart took place on 9 March 2008, allowing two engine burns to insert the inaugural Automated Transfer Vehicle (ATV) into orbit, followed by a third burn to safely de-orbit the stage—this sequence was consistently applied in all later ATV missions.
For Ariane 5ECA, the ESC (Étage Supérieur Cryotechnique — Cryogenic Upper Stage) was employed, utilizing liquid hydrogen and liquid oxygen as propellants. This stage incorporated the HM7B engine from Ariane 4’s third stage, carrying 14.7 tonnes of propellant capable of a 945-second burn and delivering a thrust of 6.5 tonnes. The ESC managed roll control during powered flight and maintained full attitude control during payload separation through hydrogen gas thrusters, while oxygen thrusters were used to control acceleration after engine shutdown. Additionally, this stage contained the Vehicle Equipment Bay, which housed flight electronics and payload interface systems.
Fairing
To ensure aerodynamic stability and shield the payload and upper stages from thermal and acoustic stresses encountered during supersonic ascent, a fairing encapsulated these components. Produced by Ruag Space, from flight VA-238 onwards, it consists of four panels that are jettisoned once the vehicle surpasses approximately 100 kilometers altitude.
Variants
| Variant | Description |
|---|---|
| G | The initial Ariane 5G (Generic) variant had a launch mass of 737 t (1,625,000 lb) with a GTO payload capacity of 6,900 kg (15,200 lb) for single payloads or 6,100 kg (13,400 lb) for dual launches. It completed 16 missions with one failure and two partial failures. |
| G+ | Featuring an enhanced EPS second stage, Ariane 5G+ increased GTO payload capacity to 7,100 kg (15,700 lb) for single or 6,300 kg (13,900 lb) for dual payloads. It flew three times in 2004 without any failures. |
| GS | As part of the Ariane 5ECA investigation, certain ECA cores were adapted with original Vulcain engines and tank sizes, designated as Ariane 5GS. This configuration combined ECA boosters with G+ EPS, delivering 6,600 kg (14,600 lb) for single or 5,800 kg (12,800 lb) for dual payloads to GTO. It flew six missions between 2005 and 2009 without failures. |
| ECA | Launched in 2005, Ariane 5ECA introduced an upgraded Vulcain 2 engine and replaced the EPS second stage with ESC-A for improved efficiency and propellant utilization. Initial GTO capacities were 9,100 kg (20,100 lb) dual or 9,600 kg (21,200 lb) single payloads; later PB+ and PC production batches enhanced this to 11,115 kg (24,504 lb). |
| ECA+ | Successfully debuting in 2019, Ariane 5ECA+ incorporated the advanced ESC-D upper stage to boost performance. |
| ES | Combining an ECA core and boosters with a restartable EPS second stage, Ariane 5ES achieved an estimated LEO capacity of 21,000 kg (46,000 lb). It supported missions deploying Automated Transfer Vehicles (ATVs) to low Earth orbit and directly placed Galileo satellites into their operational orbits. This variant flew eight times from 2008 through 2018 without failure. |
| ME (cancelled) |
The Ariane 5ME (Mid-life Evolution) project was under development until funding ended in December 2014 to focus resources on Ariane 6. The Vinci upper stage engine development continued within the Ariane 6 program, concluding final activities by late 2015. |
Pricing for launches and competitive landscape
As of , the commercial launch fee for an Ariane 5 carrying a "midsize satellite in the lower slot" was roughly €50 million, operating within an increasingly competitive launch market.
Satellites positioned in the upper slot on dual-payload Ariane 5 missions, typically heavier, commanded a higher price near €90 million. The overall cost for an Ariane 5 launch, capable of deploying two satellites simultaneously (upper and lower positions), was approximately €150 million.
Ariane 5 ME
The Ariane 5 ME (Mid-life Evolution) project was pursued until early 2015 as an interim launcher bridging the gap between Ariane 5ECA/Ariane 5ES and the forthcoming Ariane 6. Originally scheduled for a debut flight in 2018, it was intended to serve as ESA’s primary launcher until Ariane 6 became operational. However, ESA terminated funding in late 2014 to concentrate resources on Ariane 6 development.
This variant incorporated a redesigned upper stage with an enlarged propellant tank powered by the restartable Vinci engine, enabling complex orbital operations such as deploying dual satellites into distinct orbits, direct insertion into geosynchronous orbit, planetary exploration missions, and assured disposal of the upper stage. The vehicle featured an extended payload fairing up to and supported dual launches accommodating larger satellites. Payload capacity to GTO was expected to rise by 15% to , while achieving a 20% reduction in cost per kilogram compared to the Ariane 5ECA.
Development timeline
Initially referred to as Ariane 5ECB, its first flight was anticipated for 2006 but postponed following the Ariane 5ECA failure in 2002 and a downturn in the satellite market, resulting in cancellation in 2003. Nonetheless, Vinci engine development persisted at a slower pace, with ESA Council renewing funding in November 2008.
In 2009, EADS Astrium obtained a €200 million contract, followed by an additional €112 million in April 2012 to advance Ariane 5ME’s progress, with total expenditures projected around €1 billion. On 21 November 2012, ESA reaffirmed commitment to Ariane 5ME amid mounting competitive pricing pressures, deciding to utilize the Vinci upper stage on both Ariane 5ME and Ariane 6 for component standardization. The qualification flight was targeted for mid-2018.
Nevertheless, on 2 December 2014, ESA halted funding for Ariane 5ME development to prioritize Ariane 6, which offered anticipated reductions in launch costs and enhanced payload adaptability through variable solid boosters—employing two or four P120C units depending on mission demands.
Solid propellant stages
Development of the Ariane 5 EAP motors continued within the framework of the Vega programme. Vega’s first stage engine—the P80—was a shortened variant derived from the EAP motor. Its casing utilized filament-wound graphite epoxy composites, significantly lighter than traditional stainless steel. Performance enhancements included a newly designed composite steerable nozzle, improved thermal insulation, and a narrower throat section. Electromechanical actuators replaced heavier hydraulic systems for thrust vector control.
These innovations were anticipated to influence subsequent Ariane designs, particularly early concepts of Ariane 6 that featured a central P80 booster surrounded by additional boosters. Incorporating the ESC-B solid motor casing improvements alongside an upgraded Vulcain engine could have enabled payloads up to to low Earth orbit (LEO), suitable for lunar mission profiles. However, increased aerodynamic pressure (Max Q) constraints might have limited maximum payload capacity.
Ariane 6
The Ariane 6 was engineered as a cost-efficient launch vehicle designed to transport payloads up to to geostationary transfer orbit (GTO). After multiple design revisions, its capabilities closely paralleled those of the Ariane 5, with a primary focus on minimizing production expenses and reducing launch service fees. By 2014, the estimated cost per flight for Ariane 6 was approximately €70 million, which is nearly half the expense of an Ariane 5 mission.
Initial development expenditures were projected at €3.6 billion. The European Space Agency (ESA) targeted 16 July 2020 for the inaugural flight of Ariane 6. The vehicle successfully completed its first launch on 9 July 2024.
Notable launches
The maiden test flight of Ariane 5 (Ariane 5 Flight 501) on 4 June 1996 ended in failure due to a control software error, resulting in self-destruction just 37 seconds after liftoff. This malfunction was caused by incorrect data conversion within reused software from Ariane 4, which was incompatible with Ariane 5’s distinct preparation process.
The second test mission (L502) on 30 October 1997 experienced a partial failure when a Vulcain engine nozzle roll issue triggered an early shutdown of the core stage, preventing the rocket from reaching its planned orbit. The subsequent flight (L503) on 21 October 1998 was successful, followed by the first commercial deployment (L504) on 10 December 1999 carrying the XMM-Newton X-ray observatory.
On 12 July 2001, a partial malfunction placed two satellites into an orbit significantly lower than planned—approximately half the target altitude. The ESA Artemis telecommunications satellite later utilized ion propulsion to achieve its intended orbit in January 2003.
The launch on 1 March 2002 successfully inserted the Envisat environmental satellite into a , making it the heaviest single payload until the first Automated Transfer Vehicle (ATV) launch in March 2008 at .
The initial flight of the ECA variant, conducted on 11 December 2002, failed due to a coolant leak in a main booster that caused nozzle overheating; this incident resulted in the loss of two communications satellites valued at €630 million each. This setback delayed subsequent missions such as the Rosetta probe; however, no further Ariane 5 failures occurred until January 2018.
On 27 September 2003, the final Ariane 5G mission deployed three satellites, including Europe’s first lunar probe, SMART-1. Then, on 18 July 2004, an Ariane 5G+ launched Anik F2, which was at that time the heaviest telecommunications satellite at nearly .
The first successful launch of an Ariane 5ECA took place on 12 February 2005, carrying the XTAR-EUR military communications satellite along with two smaller payloads. Prior delays for this mission were attributed to additional testing and military considerations.
On 11 August 2005, the Ariane 5GS variant successfully launched Thaicom 4, then recognized as the heaviest telecommunications satellite at .
The third Ariane 5ECA flight on 16 November 2005 transported a dual payload consisting of Spaceway F2 for DirecTV and Telkom-2 for Indonesia’s PT Telekomunikasi, totaling more than , marking the heaviest dual payload launched thus far.
On 27 May 2006, an Ariane 5ECA set a new commercial payload record by deploying Thaicom 5 and Satmex 6 satellites with a combined mass of .
On 4 May 2007, an Ariane 5ECA carried Astra 1L and Galaxy 17 satellites weighing together , achieving a total payload mass of . This record was surpassed later that year on 11 November when another Ariane 5ECA launched Skynet 5B and Star One C1 with a combined payload of .
The first launch of the Ariane 5ES-ATV variant occurred on 9 March 2008 and delivered the Jules Verne ATV to the International Space Station—the heaviest payload ever sent by a European launcher—featuring an upper stage with restartable engine capability.
On 1 July 2009, Ariane 5ECA launched TerreStar-1 (EchoStar T1), then considered the largest commercial telecommunications satellite at , a title later overtaken by Telstar 19 Vantage aboard Falcon 9.
An Ariane 5ECA mission on 28 October 2010 deployed Eutelsat W3B and B-SAT's BSAT-3b satellites; while W3B suffered post-launch failure due to an oxidizer leak, BSAT-3b operated as expected.
The VA253 launch on 15 August 2020 introduced enhancements that increased lift capacity by about , incorporating lighter avionics and modified pressure venting systems designed for future deployment of the James Webb Space Telescope; this flight also marked the introduction of Galileo navigation system integration.
On Christmas Day in 2021, VA256 successfully delivered the James Webb Space Telescope toward its Sun–Earth L2 halo orbit. The highly accurate trajectory conserved fuel reserves, potentially extending operational lifespan by preserving hydrazine propellant for station-keeping maneuvers. Program manager Rudiger Albat highlighted that high-performance components were chosen for this mission, including one of the most efficient Vulcain engines ever constructed.
Records for GTO payload mass
On 22 April 2011, Ariane 5ECA flight VA-201 established a commercial milestone by delivering Yahsat 1A and Intelsat New Dawn with a combined payload mass of to geosynchronous transfer orbit (GTO). This achievement was exceeded on 2 August 2012 during flight VA-208, which carried into GTO. Six months later, flight VA-212 further elevated the record with . In June 2016, the record increased to when the rocket launched its first satellite dedicated to financial institutions. Subsequently, on 24 August 2016, the payload record was marginally improved to with the deployment of Intelsat 33e and Intelsat 36. The record advanced again on 1 June 2017, reaching by transporting ViaSat-2 and Eutelsat-172B. Most recently, in 2021, flight VA-255 set a new benchmark by placing 11,210 kg into GTO.
Incident during VA241 mission
On 25 January 2018, an Ariane 5ECA launched the SES-14 and Al Yah 3 satellites. Approximately nine minutes and twenty-eight seconds post-liftoff, communication between the launch vehicle and ground control was lost. Around one hour and twenty minutes later, both satellites were confirmed separated and in contact with their operators; however, their orbital inclinations were incorrect due to a malfunction in the guidance system. As a result, additional orbital maneuvers were necessary, prolonging the commissioning phase. SES-14 required roughly eight extra weeks before becoming operational in early September instead of July but is still projected to achieve its expected service life. Initially, SES-14 had been slated for launch aboard a Falcon 9 with more propellant margin due to its higher inclination orbit.
Al Yah 3 was also verified healthy after more than twelve hours without telemetry updates; its maneuver plan was adjusted to meet mission objectives. By mid-February 2018, Al Yah 3 was nearing its target geostationary orbit following recovery maneuvers. The investigation determined that erroneous azimuth settings in the inertial navigation units caused the vehicle to deviate approximately 17° off course while ascending to the intended altitude. These units had been configured for a standard geostationary transfer orbit at 90°, whereas this mission required a supersynchronous transfer orbit at around 70°, resulting in a roughly 20° deviation.
This event ended Ariane 5’s flawless streak of 82 consecutive successful launches dating back to 2003.
Launch performance statistics
Ariane 5 rockets have conducted a total of 117 launches, achieving success in 112 missions, reflecting an overall success rate of approximately 95.7%. Between April 2003 and December 2017, Ariane 5 accomplished an uninterrupted series of 83 successful flights before experiencing a partial failure in January 2018.
Comprehensive launch list
Every launch has taken place from the Guiana Space Centre at ELA-3.
... (list continues with key payloads and customers noted; final entry below)| # | Flight no. | Date (UTC) | Rocket type/Serial no. | Payload | Mass (kg) | Orbit | Customers | Outcome |
|---|---|---|---|---|---|---|---|---|
| 1 | V-88 | 4 June1996 | G/501 | Cluster | Failure | |||
| 2 | V-101 | 30 Oct1997 | G/502 | MaqSat-H, TEAMSAT, MaqSat-B, YES | Partial failure | |||
| 3 | V-112 | 21 Oct1998 | G/503 | MaqSat3, ARD | ~6,800 | GTO | Success | |
| 4 | V-119 | 10 Dec1999 | G/504 | XMM-Newton | 3,800 | HEO | Success | |
| 5 | V-128 | 21 Mar2000 | G/505 | INSAT-3B, AsiaStar | ~5,800 | GTO | Success | |
| 6 | V-130 | 14 Sep2000 | G/506 | Astra2B, GE-7 | ~4,700 | GTO | Success | |
| 7 | V-135 | 16 Nov2000 | G/507 | PanAmSat-1R, Amsat-P3D, STRV1C, STRV1D | ~6,600 | GTO | Success | |
| 8 | V-138 | 20 Dec2000 | G/508 | Astra2D, GE-8, LDREX | ~4,700 | GTO | Success | |
| 9 | V-140 | 8 Mar2001 | G/509 | Eurobird-1, BSAT-2a | ~5,400 | GTO | Success | |
| 10 | V-142 | 12 Jul2001 | G/510 | Artemis, BSAT-2b | ~5,400 | GTO (planned), MEO (achieved) | Partial failure | |
| 11 | V-145 | 1 Mar2002 | G/511 | Envisat | 8,111 | SSO | Success | |
| 12 | V-153 | 5 Jul2002 | G/512 | Stellat5, N-STAR c | ~6,700 | GTO | Success | |
| 13 | V-155 | 28 Aug2002 | G/513 | Atlantic Bird1, MSG-1, MFD | ~5,800 | GTO | Success | |
| 14 | V-157 | 11 Dec2002 | ECA/517 | Hot Bird7, Stentor, MFD-A/B | GTO (planned) | Failure (first Ariane5ECA flight engine failure) | ||
| 15 | V-160 | 9 Apr2003 | G/514 | INSAT-3A, Galaxy12 | ~5,700 | GTO | Success | |
| 117 | VA-261 | 5 Jul2023 | ECA/5119 |
Syracuse4B (Comsat-NG2), Heinrich Hertz (H2Sat) || 7,680 || GTO || DGA, DLR || Success (Ariane5's last mission) |
See also
- List of Ariane launches
- Ariane 6, early versions
- Heavy-lift launch vehicle
- Comparison of orbital launchers families
- Comparison of orbital launch systems
- Future Launchers Preparatory Programme (ESA initiative following Ariane 5)
External links
- Overview of Ariane 5 on Arianespace
- Information on the Ariane 5 Programme at Astrium