MASS
3.5 kg
POWER
10 W
REDUNDANCY
Typically dual per spacecraft
RAD HARDENED
Yes
FIRST USE
Jan 2001
Star Tracker (Ball Aerospace CT-633) is a attitude sensor system manufactured by Ball Aerospace. It features typically dual per spacecraft redundancy. Radiation hardened for space environments.
ABOUT STAR TRACKER (BALL AEROSPACE CT-633)
The CT-633 star tracker by Ball Aerospace provides high-accuracy attitude determination by matching observed star patterns against an onboard catalog. It is used on numerous spacecraft for precise pointing. The sensor achieves sub-arcsecond accuracy enabling fine science instrument alignment.
OPERATING PRINCIPLE
CCD/CMOS sensor images star field; onboard processor matches patterns against stored catalog for 3-axis attitude
VEHICLES USING THIS SYSTEM
Various satellitesDeep-space probesGOES-RJWST
SPECIFICATIONS
| CATEGORY | Attitude Sensor |
| TYPE | Star Tracker |
| MANUFACTURER | Ball Aerospace |
| MASS | 3.5 kg |
| POWER CONSUMPTION | 10 W |
| REDUNDANCY | Typically dual per spacecraft |
| RADIATION HARDENED | Yes |
| ACCURACY | < 5 arcsec cross-boresight |
| FIRST USE | January 1, 2001 |
| STATUS | Active |
DETAILED SPECS
| FOV | 20u00b0 x 20u00b0 |
| ACCURACY_ARCSEC | 5 |
| CATALOG_STARS | 3000+ |
| UPDATE_RATE_HZ | 10 |
