Little big star tracker

ASTRO CL, the latest member of the ASTRO star sensor family for satellite constellations.

Jena-Optronik’s ASTRO CL (short for constellation) has been designed to fit the needs of LEO constellation spacecraft.

The sensor has a medium accuracy performance, is compact, lightweight, is made for high recurrent production rates and comes with a competitive price.

The system-on-chip (SoC) approach in the development of the ASTRO CL star sensor enabled the implementation of a robust star sensor, which, thanks to its highly integrated design, is extremely light and requires a small installation space. By reducing the sensor design to just a few assembly parts and active electronic components, volume production is made possible at a very attractive price.

With its technical performance and service life of 18 years (in GEO orbit), the ASTRO CL sets new standards in the field of star sensors for constellations and small satellites. The low energy consumption facilitates system integration.

The modular design of the ASTRO CL also allows the sensor to be easily adapted to mission-specific customer requirements.

Exploring a new world: NASA’s Psyche mission spacecraft equipped with sensor technology from Jena

Jena-Optronik provides autonomous star sensors to Maxar for the attitude control system of the Psyche spacecraft.

read more

Heinrich Hertz mission launched with star sensors “Made in Jena” on board

Two of Jena-Optronik’s ASTRO APS star sensors enable the attitude and orbit control of the German geostationary communication satellite, which was developed and built by OHB System AG.

read more

All News-Articles

Jena-Optronik goes ESA 4S Symposium

For the first time, Jena-Optronik will exhibit at this year’s ESA 4S Symposium in Palma de Mallorca, Spain from 27th to 31st May 2024.

read more


As we are turning 30 years, we a delighted to give you insights on our history as well as future missions with space technology made by Jena-Optronik.

read more

All Blog-Articles

Space photography

Apollo astronauts as photographers: stunning pictures of our blue marble, the moon and astronauts' lifes 

read more

Space: It’s all around us

Space inspires us all and creates a wealth of knowledge

read more

All Knowledgeplatform-Articles


  • September 18-19, 2024
    ESA Industry Space Days, Nordwijk, the Netherlands
  • September 16-20, 2024
    World Satellite Business Week, Paris, France
  • August 03-08, 2024
    Small Satellite Conference, Logan, Utah, USA