A star tracker is an optical device that captures images of the night sky and compares them with an internal star catalog to determine a satellite’s three-axis attitude. CubeSats, defined by their standardized size (1U = 10×10×10 cm), require miniaturized star trackers.
The price of a CubeSat star tracker varies significantly depending on performance specifications. Entry-level models may suffice for basic attitude determination, while high-end models can resist stray light or rapid tumbling.
Factors Affecting CubeSat Star Tracker Price
Accuracy and Resolution: Higher-accuracy trackers (achieving sub-arcsecond precision) are more expensive.
Size, Weight, and Power (SWaP): CubeSats have strict mass and energy constraints. Ultra-compact, low-power (under 1W) trackers, enabled by advanced miniaturization, are costlier. Models weighing under 100 grams may also be more expensive than bulkier ones.
Radiation Hardness and Reliability: Space radiation can damage electronics, so radiation-hardened components increase costs.
Field of View (FOV) and Update Rate: A wider FOV enables faster star acquisition, even when the satellite is tumbling. High-update-rate models (e.g., 10 Hz) are critical for dynamic missions and thus more expensive.
Integration and Customization: Off-the-shelf trackers are cheaper, but custom baffles or mission-specific software add costs. Compliance with export controls and standards like ITAR can also raise prices for international buyers.
Manufacturer and Supply Chain: Established companies with extensive testing facilities charge more, while emerging startups may offer more competitive pricing.
How to Reduce Costs
Choose COTS (Commercial Off-The-Shelf) Components:
Leverage Open-Source Resources:
Collaborate with Universities or Startups:
Monitor Market Trends:
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TY-Space Technology (Beijing) Ltd. is professional focusing on advanced attitude optical sensors, especially Star Trackers for space industry.
