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LEO Express 1

active
Technology DemonstrationLEOCOSPAR 2023-174AXLaunched 11/11/2023
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Mission & Launch
Launch Mission
Transporter-9
Launch Vehicle
Falcon 9 FT5
Launch Date
11/11/2023
Orbit & Mass
Orbit Class
LEO
Altitude
521.5 km
Inclination
97.48 deg
Dry Mass
200 kg
Total Mass
250 kg
Payload Classification
Mission Type
Technology Demonstration
Payload Category
TECH
Payload Class
B
Organizations
Operator
Impulse Space
Manufacturer
Impulse Space
Registry
COSPAR ID
2023-174AX
UN Registration
ST/SG/SER.E/1186
Track
Mentions
25
All verified mentions of this spacecraft in source documents.
0.0-5.0
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Starfish Space completed an autonomous rendezvous and proximity operations demonstration in Low Earth Orbit with Impulse Space during which Starfish’s payload autonomously controlled the LEO Express 2 Mira and brought it within approximately 1,250 meters of the LEO Express 1 Mira.

CapabilityRelationshipsValue 5.0Jan 21, 2026Latest News
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The LEO Express 2 Mira was guided to within approximately 1,250 meters of the LEO Express 1 Mira.

CapabilityGeneralValue 3.6Dec 22, 2025Autonomous Rendezvous and Proximity Mission Completed

The Remora mission achieved proximity within approximately 1,250 meters of a spacecraft used in a previous mission, LEO Express 1, using only a visible light camera.

CapabilityGeneralValue 4.0Dec 19, 202512/19宇宙ニュース・独連邦軍、約3,000億円でSAR衛星偵察契約 ICEYEとラインメタルが受注 ほか3件

Impulse Space launched the small transfer vehicle Mira in November as part of a mission called LEO Express-1 that successfully deployed a cubesat.

PlanCapabilityGeneralValue 4.0Feb 21, 2024Former U.S. Space Force chief Jay Raymond joins board of directors of Impulse Space

The Mira vehicle, flying the LEO Express-1 mission, successfully deployed a cubesat and is testing its thrusters.

CapabilityPlanValue 4.0Jan 17, 2024Impulse Space announces plan to develop high-energy kick stage

The Series A funding will support Impulse Space’s work on upcoming missions including LEO Express-1, a GEO refueling mission, and a mission to Mars.

PlanFinancialValue 4.0Sep 13, 2023Impulse Space secures million$$ in Series A funding round

LEO Express-1 is set to launch no earlier than November 2023.

PlanValue 4.0Aug 7, 2023Impulse Space: The LEO Express-2 + LEO Express-3 missions

LEO Express-2 and LEO Express-3 will launch on SpaceX Transporter rideshare missions similar to LEO Express-1.

PlanValue 4.0Aug 7, 2023Impulse Space: The LEO Express-2 + LEO Express-3 missions

LEO Express-2 and LEO Express-3 will use the same Mira vehicle used in the previously announced LEO Express-1 mission.

PlanCapabilityValue 4.0Aug 7, 2023Impulse Space: The LEO Express-2 + LEO Express-3 missions

Impulse Space will advance work on upcoming missions including LEO Express-1, a geostationary refueling mission, and an upcoming mission to Mars.

PlanCapabilityValue 3.5Aug 4, 2023Impulse Space Secures New Investment from Airbus Ventures

LEO Express-1 is set to launch no earlier than November 2023.

PlanValue 3.0Aug 1, 2023Impulse Space Announces its Upcoming LEO Express-2 and LEO Express-3 Missions

LEO Express-2 and LEO Express-3 will utilize the Mira vehicle that is being used for the LEO Express-1 mission.

PlanCapabilityValue 3.0Aug 1, 2023Impulse Space Announces its Upcoming LEO Express-2 and LEO Express-3 Missions

LEO Express-2 and LEO Express-3 will utilize the same Mira vehicle used on the LEO Express-1 mission.

CapabilityGeneralValue 3.4Jul 31, 2023IMPULSE SPACE ANNOUNCES LEO EXPRESS-2 and LEO EXPRESS-3 MISSIONS

LEO Express-1 is set to launch no earlier than November 2023.

PlanValue 3.5Jul 31, 2023IMPULSE SPACE ANNOUNCES LEO EXPRESS-2 and LEO EXPRESS-3 MISSIONS

The Series A funding will support Impulse Space’s work on upcoming missions including LEO Express-1, a GEO refueling mission, and a mission to Mars.

PlanFinancialValue 4.0Jul 25, 2023Impulse Space Secures $45M in Series A Funding Round

Impulse Space's upcoming missions include LEO Express-1, a geostationary orbit refueling mission, and a mission to Mars.

PlanCapabilityValue 4.0Jul 24, 2023Startup Impulse Space raises $45 million in Series A round

The Series A funding will support Impulse Space’s upcoming missions including LEO Express-1, a GEO refueling mission, and a mission to Mars.

FinancialPlanValue 4.0Jul 24, 2023Impulse Space secures million$$ in Series A funding round

Impulse Space’s Saiph thruster is space qualified and ready to support the LEO Express-1 mission.

CapabilityPlanGeneralValue 4.0May 11, 2023Impulse Space Successfully Qualifies Saiph Thruster Ahead its of First Mission

LEO Express-1 will utilize Mira, Impulse Space’s first spacecraft, to perform in-space services.

CapabilityValue 3.5May 11, 2023Impulse Space Successfully Qualifies Saiph Thruster Ahead its of First Mission

LEO Express-1 is Impulse Space’s first orbital mission and is scheduled to launch in October 2023.

PlanValue 4.0May 11, 2023Impulse Space Successfully Qualifies Saiph Thruster Ahead its of First Mission