Sodern Auriga CP

Flight Heritage since 2019

Sodern Auriga CP


The compact star tracker for small satellite missions & constellations, Auriga™ star tracker is packed with the latest high-tech components and optimized for small satellite platforms of less than 500kg and for CubeSats starting from 6U. Radiation-resistant with a thicker casing and hardened optics, Auriga™ allows a lifetime of over 15 years in geostationary orbit and 10 years in low Earth orbit (LEO 400-1,200km). With its standardized components, Auriga™ is specifically designed to meet cost reduction objectives while offering excellent technical performance and reliability. Its reduced volume (66 x 59 x 94 mm) and its weight of 225g make it the most compact star tracker in its category. Over 1200 Auriga™ are already in orbit with a mission success rate of 100%.

Star Tracker optical head and an electronic unit for plug-and-play integration:

  • Specifically designed for small satellite missions.
  • Low-cost, high-production rate, reduced weight and volume.
  • Guaranteed for 10 years lifetime in LEO orbit.
  • In orbit demonstration since 2019.
  • Inherited from our 50 years of experience with star trackers.

* 50.000 € for one optical head (indicative price excluding NRE)

Lead Time: Less than 3 months for small volumes for Auriga-CP. Dual use product, lead time might be subject to export control licence delay of approval.

Sodern Auriga CP Datasheet

Vendor: Sodern
Sold By : Sodern Category:


Optical Head (OH)

  • Baffle protection for direct Sun and Earth illumination
  • Up to 3 Optical Heads may be connected to the spacecraft On Board Computer
  • Connected to the spacecraft’s processor through SpaceWire interface with Power Converter Supplying
  • Lifetime can be up to 10 years in LEO and 15 years I GEO orbit with EOR

Centralized Software

  • Software integrated into the spacecraft processor. Can be made available for any processor
  • Operating frequency up to 10 Hz according to host processor performances
  • Embedded Star Catalog, Algorithms and Software library inherited from 50 years of experience and Hydra Star Tracker.


Environmental Characteristics

Operating temperature range (°C) -20/+40
Storage temperature (°C) -30/+70
Mechanical environment (in/out of plane) 14/22 gRMS / 2000gSRS @2000 Hz
OH size (mm, including baffle) 66 x 56 x 94 (height)
EU size (mm) No Electronic Unit, centralized software
OH mass (g, including baffle) 205
EU mass (g) No Electronic Unit, centralized software

Reliability, Availability and Lifetime

EEE parts class for OH ECSS Class 3 equivalent and Automotive
EEE parts class for EU No Electronic Unit, centralized software
Reliability for OH 230 FIT (FIDES method @20°C)
Reliability for EU No Electronic Unit, centralized software
Lifetime (years) 10 in LEO 400-1200km; 15 in GEO with EOR

Electrical Interfaces

OH Power supply (V) 5 (±10%)
EU Power supply (V) No Electronic Unit, centralized software
OH Power consumption (W, typ/max) 0.8/1.1
EU Power consumption (W, typ/max) No Electronic Unit, centralized software
Output data OH: SpaceWire (50 Mbps signaling rate)
Output rate (Hz) 10 (5 Hz possible to relax CPU load)

Performances and Robustness

Bias (worst case) 0,017 deg
Thermo-elastic Error (worst case) 1 arcsec/°C
Low Frequency spatial (FOV) error XY/Z @ 3σ 9/51 arcsec
High Frequency spatial (Pixel) error XY/Z @ 3σ 6.6/37 arcsec
Temporal noise on XY/Z @ 3σ 11/69 arcsec
Time from lost-in-space (typ) 4 s
Slew rate in Acquisition 0.3 deg/s
Slew rate in Tracking Up to 3 deg/s²
Acceleration in Acquisition Up to 1 deg/s²
Acceleration in Tracking at 10 Hz Up to 2.5 deg/s²
Full Moon in the field of view No performance degradation
Baffle Sun Exclusion Angle 35 deg
Baffle Earth Exclusion Angle 22 deg
Solar flare Acquisition/Tracking Robust