ASTRA SPACECRAFT ENGINE

Industry-leading, flight-proven electric propulsion systems for constellations.
Backed by flight heritage and currently on orbit.

ENGINE SPECIFICATIONS

2023.02 Spacecraft Specs 1

Xenon and Krypton electric propulsion system with a magnetically shielded thruster and best-in-class performance for spacecraft with less than 1 kW of power.

ASTRA SPACECRAFT ENGINE™ DATA SHEET

PROPELLANT
Xenon OR Krypton

INPUT POWER
400 W

THRUST
~25 mN (Xe)
~18 mN (Kr)

SPECIFIC IMPULSE
~1,400 s (Xe)
~1,300 s (Kr)

TOTAL IMPULSE
300 kN-s (Xe)
300 kN-s (Kr)

Astra System Overview 01

SYSTEM OVERVIEW

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Astra System Overview 02

COMPACT THRUSTER

Instant-start, heaterless, center-mounted cathode and permanent magnet design deliver high thrust and high Isp in a compact design which has been ground tested to 12,000 operational cycles.

Astra System Overview 03

RADIATION HARDENED POWER PROCESSING UNIT

The Power Processing Unit (PPU) is radiation hardened by design, replacing many microprocessors with simple and reliable components – creating a single circuit board design that is 95% efficient.

Increased radiation hardening extends system lifetimes and supports a broad range of LEO and GEO missions.

Astra System Overview 04

FEED SYSTEM WITH HERITAGE

Compact, bang-bang feed system with flight-proven components.

Each system is leak and vibration tested in an integrated system test to ensure on orbit reliability.

Astra System Overview 05

FLIGHT-PROVEN PROPELLANT TANK

Flight-proven, off-the-shelf propellant tanks meet a broad range of mission requirements without the high cost or long lead times of custom tanks.

Tanks are sized specifically to fit the unique requirements of each customer mission with flight-proven COPV construction rated to 4,000 psi.

MEETING MISSION DEMANDS WITH
MULTI-THRUSTER ASTRA SPACECRAFT ENGINE™ CONFIGURATIONS

Need to go faster? Need to go farther? Need to do both? Multi-thruster Astra Spacecraft Engine™ configurations allow you to build a system that meets your unique mission requirements. Select the number of thrusters that meet your delta-v requirement and choose a tank that meets your total impulse needs to build the best configuration for your constellation.

Multi Thruster 2 String
Multi Thruster 3 String
Multi Thruster 4 String
2-String Multi-Thruster2-STRING 3-String Multi-Thruster3-STRING 4-String Multi-Thruster4-STRING
INPUT POWER 800 W 1,200 W 1,600 W
THRUST ~50 mN = 25 mN x 2 (Xe)
~36 mN = 18 mN x 2 (Kr)		 ~75 mN = 25 mN x 3 (Xe)
~54 mN = 18 mN x 3 (Kr)		 ~100 mN = 25 mN x 4 (Xe)
~72 mN = 18 mN x 4 (Kr)
TOTAL IMPULSE 600 kN-s (Xe)
600 kN-s (Kr)		 900 kN-s (Xe)
900 kN-s (Kr)		 1,200 kN-s (Xe)
1,200 kN-s (Kr)