Celestron Ultima 8 - Mechanical and Electronic Specifications

Appendix C - Technical Specifications
103
Mechanical Specifications
AZM Drive System
Tracking Motor
Slewing Motor
3-speed DC-Servo
2-Speed DC
ALT Drive System
Tracking Motor
Slewing Motor
3-Speed DC-Servo
2-Speed DC
AZM Tracking Gear
Number of Teeth
Type
Pitch Diameter
Final Gear Ratio
266 teeth
48 pitch - Helical / Worm
5.535 inches
665,000:1
ALT Tracking Gear
Number of Teeth
Type
Pitch Diameter
Final Gear Ratio
241 teeth
48 pitch - Helical / Worm
5.021 inches
602,500:1
AZM Slewing Gear
Number of Teeth
Type
Pitch Diameter
Final Gear Ratio
288 teeth
48 pitch
6.00 inches
2000:1
ALT Slewing Gear
Number of Teeth
Type
Pitch Diameter
Final Gear Ratio
240 teeth
48 pitch
5.00 inches
1663:1
Time for AZM worm to rotate one revolution at
sidereal rate.
5.41 minutes
This only applies when the telescope is set to EQ
NORTH under the TRACKING option within the SETUP menu
Altitude Encoder
Resolution
Enhanced Encoder Resolution (EER)
8192 counts per 360º
~ 2.5 arc-minutes
65536 counts per 360º ~ 19 arc-seconds
Azimuth Encoder
Resolution
Enhanced Encoder Resolution (EER)
8192 counts per 360º
~2.5 arc-minutes
65536 counts per 360º ~ 19 arc-seconds
Maximum Weight Capacity 25 Lbs.
Weight of Telescope 31 Lbs.
Weight of Tripod 19 Lbs.