Electron is a small-lift launch vehicle built by Rocket Lab to give small satellites dedicated rides to orbit rather than rideshare slots on larger rockets. The rocket stands 18 meters tall and carries up to 300 kilograms to low Earth orbit.[1] Electron flew 93 times between May 2017 and August 2026, including nine suborbital HASTE missions,[2][20] making it the most-launched small orbital rocket in the world and the second most active US launcher after SpaceX's Falcon 9.[7][8]

Electron is built almost entirely of carbon fiber composite, and its Rutherford engines were the world's first electric-pump-fed rocket engines: battery-powered electric motors drive the propellant pumps instead of gas turbines.[1][19] The rocket launches from a private site on New Zealand's Mahia Peninsula and from Wallops Island, Virginia, and flies dedicated missions for commercial constellations, NASA, and defense customers; repeat constellation operators dominate the manifest, with Japanese radar-imaging companies Synspective and iQPS holding 17 and 9 further booked launches as of August 2026.[6][20]

Status as of August 2026

Electron logged its 93rd flight on August 21, 2026, when "The Lightning God Defends" lifted off from Launch Complex 1 and placed the ninth radar imaging satellite for iQPS into a 575 kilometer orbit, leaving nine more iQPS launches booked through 2030.[20] The mission was the rocket's 14th of 2026, all of them successful, running ahead of the pace that produced the record 21 launches of 2025.[7][20] On its August 10 earnings call Rocket Lab reported a launch backlog above 90 missions across Electron, HASTE, and Neutron, the highest in its history, and said it expected to beat 2025's launch total.[21] The company said in May that commercial Electron missions in its backlog were priced around 8.5 million dollars and that it was positioned to fly the 100th Electron mission before the end of 2026.[22] Every flight since the September 2023 failure has succeeded, a run of 52 straight successes.[2][20]

Design and specifications

Electron is a two-stage rocket 18 meters tall and 1.2 meters in diameter, with a liftoff mass of about 13,000 kilograms; it delivers up to 300 kilograms to low Earth orbit or 200 kilograms to a 500 kilometer Sun-synchronous orbit.[1]

ParameterElectron
Height18 m
Diameter1.2 m
Liftoff mass13,000 kg
First stage engines9 Rutherford (kerosene/liquid oxygen, electric pumps)
Second stage engine1 vacuum-optimized Rutherford
Third stageKick Stage with restartable Curie engine
Payload to low Earth orbit300 kg
Payload to 500 km Sun-synchronous orbit200 kg
Fairing1.2 m diameter, 2.5 m tall
StructureCarbon fiber composite monocoque

Electron's Rutherford engine is largely 3D printed, with combustion chambers, injectors, pumps, and valves produced additively; it was the first oxygen and hydrocarbon engine with all of its primary components additively manufactured.[1][19] Nine sea-level Rutherfords power the first stage, each producing about 24 kN of thrust at a specific impulse of 311 seconds, roughly 224 kN combined at liftoff. A single vacuum-optimized version with a larger nozzle (25.8 kN at 343 seconds) powers the second stage.[1] The lithium polymer batteries that drive the pumps become dead weight as they drain, so during the second stage burn two depleted batteries are jettisoned in flight and a third carries the burn to completion.[1]

Kick Stage and Photon

Most Electron missions include a third element, the Kick Stage: a 40 kilogram carbon composite tug powered by the restartable, pressure-fed Curie engine, which delivers 120 newtons of thrust alongside six cold gas control thrusters.[1] It circularizes orbits, deploys multiple payloads into different planes, and then deorbits itself to limit space debris: a final Curie burn lowers its perigee so that atmospheric drag brings it down within months or a few years rather than decades.[1] Rocket Lab evolved the Kick Stage into Photon, a full satellite bus that can host payloads or fly interplanetary trajectories: a Photon upper stage sent NASA's CAPSTONE cubesat toward the Moon on June 28, 2022, and the probe went on to become the first spacecraft to fly in the near rectilinear halo orbit planned for NASA's Gateway lunar station.[9]

For CAPSTONE, Rocket Lab flew a Lunar Photon whose HyperCurie engine swaps Curie's propellants for hypergolics, which ignite on contact and need no separate ignition system, while keeping the electric pumps so the batteries can recharge from solar panels between burns.[24] Over six days Lunar Photon raised its orbit with a HyperCurie burn roughly every 24 hours,[23] then a final burn accelerated CAPSTONE, a 25 kilogram cubesat, to about 39,500 kilometers per hour and released it onto a ballistic lunar transfer.[9][24] That trajectory swung the probe more than 1.5 million kilometers from Earth and let the Sun's gravity do most of the work of bending its path back toward the Moon, a four month cruise that spent far less propellant than a direct transfer and ended with arrival on November 13, 2022.[9][25]

Launch record

Electron's debut on May 25, 2017, nicknamed "It's a Test," was terminated by range safety because of a ground telemetry fault; the second flight, "Still Testing," reached orbit on January 21, 2018. Through August 21, 2026 the vehicle had flown 93 times with four failures (the 2017 debut plus one each in 2020, 2021, and 2023), and none since September 2023.[2][20]

MilestoneDateMission
First launch attemptMay 25, 2017"It's a Test"
First orbital successJanuary 21, 2018"Still Testing"
First booster splashdown recoveryNovember 20, 2020"Return to Sender"
100th satellite deployedMarch 22, 2021"They Go Up So Fast"
First lunar mission (CAPSTONE)June 28, 2022"CAPSTONE"
First Wallops, Virginia launchJanuary 24, 2023"Virginia Is For Launch Lovers"
First HASTE suborbital flightJune 18, 2023For Leidos
First reflight of a used Rutherford engineAugust 2023Flight 40
Fastest Launch Complex 1 turnaround (under 48 hours)June 28, 2025"Symphony In The Stars"
Record 21st launch of a calendar yearDecember 21, 2025"The Wisdom God Guides"
Responsive-launch recordJune 19, 2026VICTUS HAZE
93rd flightAugust 21, 2026"The Lightning God Defends"

Cadence has climbed nearly every year, from 16 launches in 2024 to a record 21 in 2025, three of them HASTE, with every mission successful; 2026 reached 14 launches by August 21.[7][8][20] Along the way the rocket deployed its 100th satellite on its 19th flight in March 2021,[28] and in June 2025 it set its fastest pad turnaround, with two launches from Launch Complex 1 less than 48 hours apart.[27] The 2026 campaign opened on January 22 with "The Cosmos Will See You Now", Electron's 80th flight and its first for European satellite company Open Cosmos, which put two telecom satellites into a 1,050 kilometer orbit.[26] The 91st flight, "Ten Owl Of Ten" in June 2026, was the tenth dedicated mission for Japanese radar operator Synspective, whose whole ten-satellite constellation has ridden on Electron and which has 17 more launches booked.[6] The 92nd, "The Grain Goddess Provides" on August 6, carried the eighth satellite for compatriot iQPS after an abort at first-stage ignition on June 30 delayed it five weeks.[3][4] The 93rd followed on August 21 with iQPS's ninth satellite, leaving nine more launches booked to finish that constellation by 2030.[20] Days before the Synspective flight, Rocket Lab set a responsive-launch record on June 19 for the US Space Force's VICTUS HAZE exercise, going from notice to liftoff in 16 hours and 42 minutes, more than ten hours faster than the previous mark; the Rocket Lab-built Pioneer spacecraft it carried then began a rendezvous and proximity operations exercise to approach another satellite in orbit.[5]

Failures and returns to flight

Electron has been lost four times in 93 flights, once to a ground fault at its debut and three times to problems in the second stage; none of the three later failures kept it grounded longer than three months.[2]

The 2017 loss was not the rocket's fault. Four minutes into "It's a Test", with Electron at 224 kilometers altitude and flying its planned trajectory, a third-party contractor's ground telemetry equipment briefly lost contact because forward error correction had been left disabled, corrupting the position data reaching range safety officials, who terminated the flight under standard rules.[29] Rocket Lab's own telemetry stayed locked on throughout, and the fix required no change to the vehicle.[29]

The three orbital failures each traced to a different cause. On "Pics Or It Didn't Happen" in July 2020, a single electrical connection in the second stage, secure enough to pass testing, worked loose in flight and heated under rising resistance until the stage shut down; the seven satellites aboard were lost.[30][31] Electron returned to flight 58 days later, on August 31, 2020, with a radar satellite for Capella Space.[32] On "Running Out Of Toes" in May 2021, a previously undetectable failure mode in the second stage igniter corrupted signals inside the engine computer, which pushed the thrust vector control off nominal and then commanded the propellant pumps to zero, costing two BlackSky satellites; the first stage still completed its parachute descent and was recovered from the ocean.[33][34] Flights resumed 75 days later with a US Space Force mission.[35]

The September 2023 failure on "We Will Never Desert You" had the most involved cause. An imperceptible fault in the insulation of the high voltage loom feeding the Rutherford's motor controllers let an electrical arc form in the near-vacuum of the interstage, where residual helium and nitrogen sat at the pressure Paschen's law requires for an arc to travel, shorting the battery packs that power the second stage.[36] Rocket Lab added ground testing to catch loom faults, changed the design to stop comparable arcs, and sealed the battery frame section to hold pressure through stage separation; Electron flew again 87 days later, on December 15, 2023, carrying its first satellite for iQPS.[36][37]

Booster recovery program

Rocket Lab pursued reuse of Electron's first stage in phases. Flights beginning with "Return to Sender" in November 2020 demonstrated guided reentry and parachute splashdown, with the stage pulled from the Pacific by ship.[10] On May 2, 2022, a Sikorsky S-92 helicopter briefly caught a descending booster's parachute line in midair during the "There And Back Again" mission, but the pilot released it into the ocean after the load behaved differently than in rehearsals.[11] The company concluded that marine recovery was simpler and nearly as effective, dropped the helicopter approach, and refurbished recovered hardware; a previously flown Rutherford engine returned to flight in August 2023 after passing full-duration requalification tests.[12][13] The closest the program came to a full reflight was in April 2024, when the booster from January's "Four Of A Kind" mission became the first recovered stage returned to the standard production line, having passed tank pressurization, helium leak, and structural tests on its carbon fiber airframe.[38]

Full Electron reflight was never made routine. Rocket Lab has since concentrated its reusability investment on Neutron, its medium-lift rocket with a first flight targeted for no earlier than the fourth quarter of 2026 after a tank qualification failure that January, while Electron continues to fly in expendable configuration on most missions.[13][14] The recovery campaign nonetheless supplied the company's engineers with flight-proven data on reusable rocket operations that fed directly into Neutron's design.[13]

HASTE suborbital variant

The Hypersonic Accelerator Suborbital Test Electron (HASTE) is a modified Electron that lofts up to 700 kilograms on suborbital trajectories for hypersonics research, primarily for US defense agencies and their contractors. It swaps the orbital Kick Stage for a version adapted to hypersonic payload deployment and offers tailored fairing options for air-breathing, ballistic reentry, and boost-glide test vehicles.[15]

ParameterElectronHASTE
TrajectoryOrbitalSuborbital
Payload300 kg to low Earth orbitUp to 700 kg
Third stageKick Stage or PhotonKick Stage adapted for hypersonic payload deployment
First flightMay 25, 2017June 18, 2023
Launch sitesMahia, New Zealand and Wallops, VirginiaWallops, Virginia, with a Kodiak, Alaska pad planned
Main customersCommercial constellations, NASA, defenseUS defense agencies and their contractors

HASTE first flew on June 18, 2023 from Virginia and had completed nine missions by August 2026, three of them that year, giving the Pentagon a commercial testbed for reentry vehicles, scramjet experiments, and materials at a fraction of traditional program costs.[2][4][15] The manifest keeps growing: a 190 million dollar contract signed in March 2026 covers 20 flights over four years under the Defense Department's MACH-TB 2.0 hypersonic testbed, and a record 266 million dollar Space Force award in July 2026 added at least 12 suborbital missions that will fly ballistic missile and hypersonic glide vehicle test profiles for missile-defense work.[16][17][18]

NASA science missions

NASA has repeatedly used Electron for small science payloads that need specific orbits. In May 2023 two Electrons launched the agency's four TROPICS storm-monitoring cubesats from Launch Complex 1 Pad B, two per rocket, into an inclined orbit over the tropics from which the constellation passes over a given tropical cyclone about once an hour; conventional weather satellites manage a pass roughly every six hours.[39] The pattern repeated in 2024 for PREFIRE, a pair of cubesats that measure the far-infrared radiation escaping Earth at the poles, a term in the planet's energy budget that had never been systematically measured. Each satellite needed its own near-polar orbit, so Electron flew them separately on May 25 and June 5, 2024, New Zealand time.[40][41] The CAPSTONE lunar mission, covered above, also flew for NASA under the same dedicated-launch model.[9]

Customers and pricing

Constellation operators are Electron's core market, and some have trusted it with entire constellations. French operator Kinéis booked five dedicated launches for its 25 satellite Internet of Things constellation and flew all five between June 2024 and March 2025, five 28 kilogram satellites at a time into 650 kilometer orbits, choosing the launch site, date, and orbital parameters for each batch; the closing "High Five" mission completed the constellation less than a year after the first launch.[42] BlackSky has launched its Gen-2 and Gen-3 imaging satellites on Electron since 2019, and a February 2026 contract for four more dedicated missions brought the operator's Electron launches to 17, more than any other launch provider has flown for it.[43] Synspective and iQPS, the Japanese radar operators whose missions dominate the current manifest, together held 26 further booked launches as of August 2026.[6][20]

That service carries a premium price. Commercial Electron missions in Rocket Lab's backlog were priced around 8.5 million dollars as of May 2026, up from 5 to 6 million in the vehicle's early years, and the company booked a record 31 Electron and HASTE launches in the first quarter of 2026 alone, lifting the Electron backlog past 70 missions.[22] What the price buys is control: a dedicated customer sets the orbit, the schedule, and the deployment sequence instead of conforming to a rideshare manifest, a pitch Rocket Lab sums up as selling certainty and responsiveness.[22][42]

Launch sites and cadence

Rocket Lab launches Electron from two pads at Launch Complex 1 on New Zealand's Mahia Peninsula, the world's first private orbital launch site, which can support up to 120 launches a year over the Pacific.[1] Launch Complex 2 at the Mid-Atlantic Regional Spaceport on Wallops Island, Virginia, entered service in January 2023 and hosts US government and HASTE missions; between the two complexes Electron can reach orbital inclinations from 38 to 120 degrees.[1] A new site is on the way: the July 2026 Space Force contract funds a HASTE pad at the Pacific Spaceport Complex on Kodiak Island, Alaska, with a first mission targeted for no earlier than late 2026.[17][18] Operating from both hemispheres lets the company serve nearly any inclination and schedule dedicated launches within days of customer need, the core of Electron's business case against rideshare alternatives.[1][7] The production line behind that cadence was sized to build 52 Electrons a year.[22]

References

  1. Electron Payload User Guide, Version 8.0 - Rocket Lab, September 2025.
  2. List of Electron launches - Wikipedia.
  3. Rocket Lab Successfully Completes 92nd Electron Mission, 8th Launch for iQPS Earth-Imaging Constellation - Rocket Lab, August 6, 2026.
  4. Rocket Lab launches 8th iQPS satellite - SpaceNews, August 6, 2026.
  5. Rocket Lab Shatters Responsive Space Record: Launches U.S. Space Force VICTUS HAZE Mission in 16 Hours 42 Minutes - Rocket Lab, June 22, 2026.
  6. Rocket Lab Completes 10th Consecutive Launch with 100% Mission Success for Synspective - Rocket Lab, June 26, 2026.
  7. Rocket Lab Successfully Launches for iQPS, Ends 2025 with 21 Launches and 100% Mission Success - Rocket Lab, December 21, 2025.
  8. Rocket Lab wraps up record launch year - SpaceNews, December 2025.
  9. What is CAPSTONE? - NASA.
  10. Rocket Lab Launches 16th Mission, Completes Booster Recovery - Rocket Lab, November 2020.
  11. Epic catch! Rocket Lab snags falling booster with helicopter after 34-satellite launch - Space.com, May 2022.
  12. Rocket Lab Launches 40th Electron Mission, Successfully Flies Reused Engine - Rocket Lab, August 2023.
  13. Peter Beck discusses Neutron development as maiden flight nears - NASASpaceflight, October 2025.
  14. Rocket Lab delays Neutron debut to late 2026 - SpaceNews, 2026.
  15. Rocket Lab Debuts HASTE Rocket with First Successful Suborbital Launch from Virginia - Rocket Lab, June 18, 2023.
  16. Rocket Lab Secures $190M Contract for 20x HASTE Launches, Cements Hypersonics Leadership with Department of War Partnership - Rocket Lab, March 18, 2026.
  17. Rocket Lab to open Alaska launch site under $266 million Space Force deal - SpaceNews, July 2026.
  18. Rocket Lab Awarded Record $266M Missile Defense Contract with U.S. Space Force for Suborbital Launches - Rocket Lab, July 27, 2026.
  19. Rocket Lab Celebrates 100th Rutherford Engine Build - SpaceNews, June 2019.
  20. MISSION SUCCESS: Rocket Lab Launches 93rd Electron Mission - Rocket Lab, August 20, 2026.
  21. Earnings call transcript: Rocket Lab Q2 2026 revenue tops forecasts, shares fall - Investing.com, August 2026.
  22. Earnings call transcript: Rocket Lab Q1 2026 sees record revenue growth - Investing.com, May 2026.
  23. Rocket Lab's Lunar Photon Completes Sixth Orbit Raise for NASA's CAPSTONE Mission to The Moon - Rocket Lab, July 2022.
  24. Rocket Lab & NASA launch CAPSTONE to the Moon - NASASpaceflight, June 2022.
  25. CAPSTONE Uses Gravity on Unusual, Efficient Route to the Moon - NASA, May 2022.
  26. Rocket Lab launches its 1st mission of 2026, sending 2 satellites to orbit - Space.com, January 2026.
  27. Rocket Lab Completes Record Launch Turnaround From Launch Complex 1, Successfully Deploys 68th Electron Mission - Business Wire, June 28, 2025.
  28. Rocket Lab Successfully Launches 19th Electron, Deploys 100th Satellite - Business Wire, March 22, 2021.
  29. Rocket Lab Completes Post-Flight Analysis for Electron 'It's a Test' - Rocket Lab, August 2017.
  30. Rocket Lab Electron launch fails to reach orbit, 7 satellites lost - Space.com, July 2020.
  31. Rocket Lab will resume Electron launches in August after July 4 failure - Space.com, July 2020.
  32. Rocket Lab Successfully Deploys Satellite for Capella Space on 14th Mission - Rocket Lab, August 2020.
  33. Rocket Lab Completes Anomaly Review, Next Mission on the Pad in July - Rocket Lab, July 19, 2021.
  34. Rocket Lab Electron booster launch fails to reach orbit, 2 satellites lost - Space.com, May 2021.
  35. Rocket Lab returns Electron to flight with dedicated US Space Force mission - NASASpaceflight, July 2021.
  36. Rocket Lab Sets Next Electron Launch Window, Provides Update on Anomaly Review - Business Wire, November 8, 2023.
  37. Rocket Lab returns to flight following anomaly - NASASpaceflight, December 2023.
  38. Rocket Lab Returns Previously Flown Electron to Production Line in Preparation for First Reflight - Business Wire, April 10, 2024.
  39. NASA, Rocket Lab Complete Launch of TROPICS CubeSat Constellation - NASA, May 2023.
  40. Rocket Lab launches first of NASA's climate-monitoring PREFIRE spacecraft - Spaceflight Now, May 2024.
  41. Rocket Lab's Electron Rocket 'Go' for Launch! - NASA Small Satellite Missions blog, June 4, 2024.
  42. Successful Rocket Lab Launch Completes Deployment of Full Kinéis Constellation in Less Than a Year - Rocket Lab, March 2025.
  43. Rocket Lab Secures Latest Multi-Launch Contract with BlackSky for 4x Dedicated Electron Missions - Rocket Lab, February 26, 2026.