HARDWARE / PRODUCTUpdated 24 Jul 2026

ST400

Berlin Space Technologies
ST400

The ST400 is a high-precision star tracker developed in collaboration with AAC Hyperion, providing a full and autonomous attitude solution for demanding small satellite missions.

Typed specifications32 values

Discloses 8 of 12 fields engineers filter by in this category (category median 8).

Accuracy, cross-boresight
5 arcsec
datasheet p.0 5 arcsec pitch & yaw, 1 sigma
Mass
270 g
ST400D · datasheet p.0 350 g with Baffle 40° Sun Exclusion
Accuracy, about boresight (roll)
40 arcsec
datasheet p.0 40 arcsec roll, 1 sigma
Envelope (L×W×H)
48x57x89mm³
ST400D · datasheet p.0 74x74x146mm³ with Baffle 40° Sun Exclusion
Update rate
5 Hz
max · datasheet p.0 5 Hz max · up to 5 Hz
Max tracking rate
0.3 °/s
nominal conditions (pitch, yaw) · datasheet p.0 1 °/s nominal conditions (pure roll)  |  0.3 °/s max · pitch, yaw; nominal conditions  |  1 °/s max · pure roll; nominal conditions
Sun exclusion angle
40 °
Baffle · datasheet p.0 40 ° with baffle
Supply voltage
3.7–5 V
datasheet p.0 3.7–5 V DC
Power consumption
0.67 W
@ 3.7V · datasheet p.0 0.67 W 3.7 V  |  0.67 W 3.7V
Data interface
RS-422
datasheet p.0
Operating temperature
-20–40 °C
datasheet p.0
Radiation tolerance (TID)
11 krad
Proton 130 MeV · datasheet p.0 11 krad radiation test, proton 130 MeV
Design lifetime
5 years
design life, LEO · datasheet p.1 5 years LEO
Configuration
single unit
datasheet p.1
Limiting star magnitude
6 Mv
product page
Flight heritage
space heritage
datasheet p.0
Satellite class
microsat 10-100 kg
datasheet p.1
Baffle
optional
datasheet p.1

Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.

As published by the supplier9 lines, in the manufacturer's own wording
Accuracy
5 arcsec
Update rate
5 Hz
Limiting magnitude
6.0
Sun exclusion angle
40°
Data interface
UART (TTL), RS422 (optional)
Mass
350 g
Dimensions
74x74x146 mm
Design life
5 years
Space heritage
since 2015

About

The ST400 is a high-precision star tracker, an advanced version of the ST200, developed and built in collaboration with AAC Hyperion. It is designed to deliver a full and autonomous attitude solution, making it suitable for demanding small satellite missions. The device boasts an accuracy of 5 arcseconds and an update rate of 5Hz. It can track stars up to a limiting magnitude of 6.0 and has a sun exclusion angle of 40°. For data communication, it offers a UART (TTL) interface, with RS422 available as an optional interface. The ST400 has a mass of 350g and compact dimensions of 74x74x146mm. It is designed for a life span of 5 years and has flight heritage dating back to 2015.

Documentation

Need the full ICD, test reports or a specific revision? Ask the supplier directly.

Source: www.berlin-space-tech.com ↗

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