Asteroid Space Vehicle Bus

ESPA Grande Class Small Spacecraft Bus

ASTEROID is an ESPA Grande Class Small Spacecraft Bus product family used for a variety of missions in LEO (< 600 km). ASTEROID is ideal for telescope-based missions leveraging its Ø36” x 54” hollow internal volume. ASTEROID leverages the same core avionics from Moog’s Space Vehicle family that have been demonstrated in missions from LEO to the Moon. Agile platform with no deployables reduces any jitter. The simple and robust all aluminum structure provides stiffness, radiation shielding, and stable thermal environment.



Key Features

  • Avionics leveraging Moog’s BRE440™ Rad-Hard CPU
  • LEO up to 600 km with 3-5 year life
  • Flexible flight software is payload and mission configurable
  • 3-Axis stabilized platform with reaction wheels and torque rods
  • Single string but layered GNC sensor suite provides resiliency
  • Ideal for ESPA Grande rideshare launches


Characteristic Performance / interfaces


Up to 600 km
Mission Life 3-5 years
Radiation 25.5 kRad total dose with 0.200” Al shielding
Radiation Effects Availability due to SEU of >99% over 1 year
Example Payload Power
(Orbit and Mission Dependant)
~25 W OAP Payload Power
Bus Mass 150 kg Bus Dry Mass
Bus Volume 42” x 46” x 56” height (or radial direction if on ESPA)
Orbital Position Knowledge <5 m
Attitude Knowledge Telemetry Accuracy <10 arc-sec (1 sigma)
Pointing Accuracy <10 arc-sec (1 sigma) 
Attitude (Pointing) Stability/Jitter Jitter < 1 arc-sec
Velocity Accuracy 0.1 m/s
Maximum Slew Rate >1 deg/sec
Delta-V None – No Propulsion
Payload Interfaces (Data)  2 x SpaceWire, 4xDiscretes, 1 x GPS 1PPS (via LVDS)
Payload Interfaces (Power 28 [25/33] VDC Unregulated Bus Voltage (multiple 1.2 A switches)
Payload Interfaces (Mechanical)  Ø36” x 54” internally mounted to Bus
Payload Mass 100-150 kg


Datasheets, Brochures and Catalogs

Related Industries


Moog has designed and manufactured components and systems for satellites and launch vehicles for more than 60 years.


Moog is recognized by military forces around the world for its industry-leading solutions, which include counter-unmanned aerial systems (C-UAS), fast ammunition handling, precise missile steering, weapon stores management, turreted weapon systems and quiet undersea actuation.