Nexstar 102 Manuel D’Utilisation
34
APPENDIX A - TECHNICAL SPECIFICATIONS
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NexStar 60mm
NexStar 80mm
NexStar 102mm
NexStar 114mm
NexStar 130mm
Design Refractor
Refractor
Refractor Reflector Reflector
Aperture
60mm 80mm 102mm 114mm 130mm
Focal
Length
700mm 900mm 660mm 1000mm
650mm
F/ratio of the Optical System
12
11
6.5
9
5
Optical Coatings
Fully Coated
Fully Coated Multi
Coated Aluminum Aluminum
Highest Useful Magnification
175x
189x
240x
269x
306x
Resolution: Rayleigh Criterion
Dawes Limit
Dawes Limit
2.31 arc seconds
1.93 arc seconds
1.93 arc seconds
1.73 arc seconds
1.45 arc seconds
1.45 arc seconds
1.36 arc seconds
1.14 arc seconds
1.14 arc seconds
1.21 arc seconds
1.02 arc seconds
1.02 arc seconds
1.06 arc seconds
.89 arc seconds
.89 arc seconds
Light Gathering Power
73x unaided eye
131x unaided eye
212x unaided eye
265x unaided eye
345x unaided eye
Field of View: Standard Eyepiece
1.6º 1.3º 1.7º 1.1º 1.7º
Linear Field of View (at 1000
yds)
yds)
84feet
66 feet
91 feet
59 feet
91 feet
Eyepiece Magnification:
28x (25mm)
78x (9mm)
78x (9mm)
36x (25mm)
100x (9mm)
100x (9mm)
26x (25mm)
73x (9mm)
73x (9mm)
40x (25mm)
111x (9mm)
111x (9mm)
26x (25mm)
62x (9mm)
62x (9mm)
Optical Tube Length
28 inches
34 inches
23 inches
19 inches
21 inches
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Input Voltage
12 V DC Nominal
Batteries Required
8 AA Alkaline
Power Supply Requirements
12 VDC-750 mA (Tip positive)
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Motor: Type
Resolution
Resolution
DC Servo motors with encoders, both axes
.26 arc sec
.26 arc sec
Slew speeds
Nine slew speeds: 4º /sec, 2º /sec, 1º/sec, .5 /sec, 32x, 16x, 8x, 4x, 2x
Hand Control
Double line, 16 character Liquid Crystal Display
19 fiber optic backlit LED buttons
19 fiber optic backlit LED buttons
Fork Arm
Cast aluminum
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Software Precision
16 bit, 20 arc sec. calculations
Ports
RS-232 communication port on hand control
Tracking Rates
Sidereal, Solar and Lunar
Tracking Modes
Alt-Az, EQ North & EQ South
Alignment Procedures
Sky Align, Auto 2-Star, 2-Star, One-Star, Solar System Align
Database
99 user defined programmable object.
Expanded information on over 100 objects
Expanded information on over 100 objects
Total Object Database
4,033 Objects