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Celestron C8-N Appendix A - Technical Specifications, Advanced Series, 31061, 11047, Advanced GT

Models: C10-N C8-NGT C8-N

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Appendix A – Technical Specifications

Advanced Series	31061 / 31062			11047 / 11048
		C8-N		C10-N
Specifications:
Optical Design	200mm (8.0") reflector			254mm (10") reflector
Focal Length	1000mm F/5 Parabola			1200mm F/4.7 Parabola
Finderscope		9x50		9x50
Mount	CG-5 Equatorial			CG-5 Equatorial
Eyepiece	20mm - 1.25" (50x)			20mm – 1.25" (60x)
Accessory tray		Yes		Yes
Tripod	2" Stainless Steel			2" Stainless Steel
Technical Specs
Highest Useful Magnification		480x		600x
Lowest Useful Magnification		29x		36x
Limiting Stellar Magnitude	14			14.5
Resolution: Rayleigh	.69 arc seconds			.54 arc seconds
Dawes Limit	.58 arc seconds			.46 arc seconds
Photographic Resolution		400 line/mm		425 line/mm
Light Gathering Power	843x unaided eye			1316x unaided eye
Field of View: standard eyepiece	1º			.83º
Linear FOV (@1000 yds)		52.5 ft.		43.8 ft.
Optical Coatings - Standard	Aluminum Coating			Aluminum Coating
Secondary Mirror Obstruction	2.2"			2.3"
by Area	8%			5%
by Diameter	28%			23%
Optical tube length		37 inches		45 inches
Telescope Weight		78 lbs		93 lbs

Advanced GT

Additional Specifications
Hand Control		Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
Motor: Type		DC Servo motors with encoders, both axes
Max Slew Speed		3º/second
Software Precision		24bit, 0.08 arc sec calculation
Hand Control Ports		RS-232 communication port on hand control
Motor Ports		Aux Port, Autoguide Ports
Tracking Rates		Sidereal, Solar and	Lunar
Tracking Modes		EQ North & EQ South
Alignment Procedures		AutoAlign, 3-Star Alignment, Quick Align, Last Align
Database		40,000+ objects, 400 user defined programmable objects.
Database		Enhanced information on over 200 objects
Complete Revised NGC Catalog		7,840
Complete Messier Catalog		110
Complete IC Catalog		5,386
Complete Caldwell		109
Abell Galaxies		2,712
Solar System objects		9
Famous Asterisms		20
Selected CCD Imaging Objects		25
Selected SAO Stars		29,500
Total Object Database		45,492

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Celestron C8-NGT, C10-N manual Appendix A - Technical Specifications, Advanced Series, 31061, 11047, Advanced GT

Contents

Advanced Series Advanced Series GT C8-N / C8-NGTC10-N / C10-N INSTRUCTION MANUALAdjusting the Mount in Altitude TELESCOPE BASICS Some of the many standard features of the Advanced GT include C8-N Shown Fig 1-1 - The Advanced Series NewtonianC8-NGT Shown Fig 1-2 - The Advanced Series GT Newtonian11047 Setting up the TripodAttaching the Equatorial Mount 31061Attaching the Center Leg Brace Installing the Counterweight BarInstalling the Counterweight Attaching the Hand Control Holder Advanced GT Models OnlyAttaching the Slow Motion Knobs For Non-GT Models Only Attaching the Telescope Tube to the Mount Installing the Finderscope Installing the Eyepiecestelescope Balancing the Tube in R.A Balancing the Telescope in DECOF THE TELESCOPE TUBE COMPLETELY Adjusting the Mount in Altitude Adjusting the MountAdjusting the Mount in Azimuth Powering the TelescopeAttaching the Declination Cable For GT Models Only The Advanced GT Hand Control Double Stars Hand Control OperationNamed Stars Named ObjectsStartup Procedure Alignment ProceduresAuto Three-Star Align Auto AlignQuick-Align Last AlignmentRe-Alignment Finding Planets Object CatalogSelecting an Object Slewing to an ObjectRate Button Tour ModeConstellation Tour Direction ButtonsNine available slew speeds Setup Procedures1 = 2 = 1x sidereal 3 = 4 = 5 = 6 = 7 = .5º / sec 8 = 2º / sec 9 = 3º / secIdentify Precise GoTo Scope Setup FeaturesObserving Tip Helpful Hint Utility Features Helpful Hint LIST ADVANCED GTMENU ALIGNMENTA cutaway view of the light path of the Newtonian optical design Image OrientationActual image orientation as seen with the unaided eye FocusingAligning the Finderscope Calculating MagnificationGeneral Observing Hints Determining Field of ViewThe celestial sphere seen from the outside showing R.A. and DEC The Celestial Coordinate SystemMotion of the Stars Pointing at Polaris Latitude Scalesthe south celestial pole Finding the North Celestial PoleDeclination Drift Method of Polar Alignment Observing the Sun Observing the MoonLunar Observing Hints Observing the PlanetsTransparency Solar Observing HintsObserving Deep Sky Objects Seeing ConditionsSeeing conditions directly affect image quality. These drawings represent a point source i.e., star under bad seeing conditions left to excellent conditions right. Most often, seeing conditions produce images that lie some where between these two extremes Piggyback Short Exposure Prime Focus Photography Lunar Phase Terrestrial PhotographyMetering Reducing VibrationAuto Guiding Care and Cleaning of the Optics CollimationAligning the Secondary Mirror Aligning the Primary Mirror Procedure Please read this section completely before beginning Night Time Star CollimatingPage Series 2 - #94119-20 40mmSeries 1 - #94119-10 Orange, Light Blue, ND13%T, Polarizing #s 21, 80A, #15, PolarizingYellow, Deep Yellow, Violet, Pale Blue #s 8, 47, 82A, 96ND-13 Series 3 - #94119-30Light Red, Blue, Green, ND50% T #s 23A, 38A, 58, 96ND-50 Series 4 - #94119-40Page 11047 Appendix A - Technical SpecificationsAdvanced Series 31061Appendix B - Glossary of Terms Page Page CONNECTICUT APPENDIX C LONGITUDES AND LATITUDESLONGITUDE LONGITUDE LONGITUDE INTERNATIONAL CANADADescription Appendix D - RS-232 ConnectionPC Command ASCII Communication ProtocolAdditional RS232 Commands Reset The Position Of Azm Or AltSend Any Track Rate Through RS232 To The Hand Control APPENDIX E - MAPS OF TIME ZONES Page Page Page Page Page Page Page CELESTRON TWO YEAR WARRANTY Products or instructions may change without notice or obligation Celestron 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. 310Fax. 310 Copyright 2003 Celestron All rights reserved