The T1 Star Tracker from TERMA is a Star Tracker with Altitude Accuracy 10 arcseconds, Mass 310 g (OH), 100 x 100 x 40 g (EU), Slew Rate 0.5 to 3 Degree/sec, Data Update Rate 10 Hz, Field of View 20 Degree. More details for T1 Star Tracker can be seen below.