Celestron C10-NGT Instruction Manual Download Page 51

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Appendix A – Technical Specifications

Advanced Series

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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

Eyepiece

20mm - 1.25" (50x)

20mm – 1.25" (60x)

Accessory tray

Yes Yes

Tripod

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 (@

000 yds)

52.5 ft.

43.8 ft.

Optical Coatings - Standard

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.
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

Famous Asterisms

Selected CCD Imaging Objects

Selected SAO Stars

29,500

Total Object Database

45,492

Summary of Contents for C10-NGT

Page 1: ...d dv va an nc ce ed d S Se er ri ie es s A Ad dv va an nc ce ed d S Se er ri ie es s G G GT T T I IN NS ST TR RU UC CT TI IO ON N M MA AN NU UA AL L C C8 8 N N C C8 8 N NG GT T C C1 10 0 N N C C1 10 0...

Page 2: ...ration 16 Alignment Procedures 17 Startup Procedure 17 Auto Align 18 Auto Three Star Align 18 Quick Align 19 Last Alignment 19 Re Alignment 19 Object Catalog 20 Selecting an Object 20 Slewing to an Ob...

Page 3: ...bserving the Planets 37 Observing the Sun 37 Solar Observing Hints 38 Observing Deep Sky Objects 38 Seeing Conditions 38 Transparency 38 Sky Illumination 38 Seeing 38 ASTROPHOTOGRAPHY 40 Piggyback 40...

Page 4: ...mance features The AST s deluxe features combine with Celestron s legendary optical systems to give amateur astronomers the most sophisticated and easy to use telescopes available on the market today...

Page 5: ...1 Finderscope 7 2 Steel Tripod 2 Finderscope Bracket 8 Center Leg Brace Accessory Tray 3 Eyepiece 9 Counterweights 4 Focuser 10 Counterweight Bar 5 Tube Rings 11 Dovetail Slide Bar 6 Latitude Adjustme...

Page 6: ...e 10 Counterweight Bar 4 Focuser 11 Dovetail Slide Bar 5 Tube Rings 12 Optical Tube 6 Latitude Adjustment Lever 13 Hand Control 7 2 Steel Tripod 14 R A Motor Drive Control Panel CONTROL PANEL 15 Decli...

Page 7: ...that extends down from the tripod head that attaches the equatorial mount to the tripod To set up the tripod 1 Stand the tripod upright and pull the tripod legs apart until each leg is fully extended...

Page 8: ...tripod legs 2 Thread the accessory tray knob on to the central rod and tighten I In ns st ta al ll li in ng g t th he e C Co ou un nt te er rw we ei ig gh ht t B Ba ar r To properly balance the telesc...

Page 9: ...eces the leg clamp that snaps around the tripod leg and the holder which attaches to the leg clamp To attach the hand control holder 1 Place the leg clamp up against one of the tripod legs and press f...

Page 10: ...tom of the telescope tube Before you attach the optical tube make sure that the declination and right ascension clutch knobs are tight This will ensure that the mount does not move suddenly while atta...

Page 11: ...Slide the finder bracket attached to the finderscope into the mounting bracket on the telescope 7 The finderscope bracket will slide in from the back The finderscope should be oriented so that the obj...

Page 12: ...n the telescope off to one side of the mount make sure that the mounting bracket screw is tight The counterweight bar will extend horizontally on the opposite side of the mount see figure 2 13 2 Relea...

Page 13: ...of the telescope during the polar alignment process The actual process of polar alignment that is making the telescope s axis of rotation parallel to the Earth s is described later in this manual in t...

Page 14: ...n right ascension and declination as described earlier in this manual A At tt ta ac ch hi in ng g t th he e D De ec cl li in na at ti io on n C Ca ab bl le e F Fo or r G GT T M Mo od de el ls s O On n...

Page 15: ...the individual components of the computerized hand controller 1 Liquid Crystal Display LCD Window Has a dual line 16 character display screen that is backlit for comfortable viewing of telescope infor...

Page 16: ...o Displays coordinates and useful information about objects selected from the Advanced GT database 6 Tour Activates the tour mode which seeks out all the best objects for the current date and time and...

Page 17: ...en display the last entered local time date time zone longitude and latitude Use the Up Down keys 10 to view the current parameters Press ENTER to accept the current parameters Press UNDO to enter cur...

Page 18: ...scope and then center the star in the eyepiece pressing ENTER when complete When the telescope has been aligned on all three stars the display will read Alignment Successful and you are now ready to f...

Page 19: ...the telescope was last powered down This is a useful feature should your telescope accidentally lose power or be powered down NOTE Just like with Quick Align you can use the Re alignment feature see...

Page 20: ...rdized catalogs For example to find the Orion Nebula press the M key and enter 042 Slewing to an Object Once the desired object is displayed on the hand control screen choose from the following option...

Page 21: ...trol the telescope s motion in altitude up and down and azimuth left and right The telescope can be controlled at nine different speed rates Rate Button Pressing the RATE key 11 allows you to instantl...

Page 22: ...t is being observed Sidereal This rate compensates for the rotation of the Earth by moving the telescope at the same rate as the rotation of the Earth but in the opposite direction When the telescope...

Page 23: ...Save Land Obj command and press ENTER The display will ask you to enter a number between 1 200 to identify the object Press ENTER again to save this object to the database To replace the contents of a...

Page 24: ...for the star to appear to move in the eyepiece There are two values for each axis positive and negative Positive is the amount of compensation applied when you press the button in order to get the gea...

Page 25: ...pe tube is on one side of the Meridian Once the tube passes over to the other side of the Meridian the Goto approach will need to be reversed To change the Goto approach direction simply choose Goto A...

Page 26: ...d Series telescopes such as Calibrate Goto Polar Alignment Hibernate as well as many others Calibrate Goto Goto Calibration is a useful tool when attaching heavy visual or photographic accessories to...

Page 27: ...telescope Goto Alt Az Allows you to enter a specific altitude and azimuth position and slew to it Hibernate Hibernate allows the telescope to be completely powered down and still retain its alignment...

Page 28: ...ENTER RA DEC SAVE LAND OBJ GOTO LAND OBJ USER OBJECTS GET RA DEC GOTO RA DEC SELECT CATALOG IDENTIFY GOTO TYPE PRECISE GOTO MENU SET TO INDEX ENTER TIME DLS ST TIME ZONE ENTER DATE MM DD YY CENTER STA...

Page 29: ...t path is intercepted and reflected out to the side you can have focal lengths up to 1000mm and still enjoy a telescope that is relatively compact and portable A Newtonian Reflector telescope offers s...

Page 30: ...finderscope while the remaining screws are used to adjust the finder horizontally and vertically To align the finder 1 Choose a target that is in excess of one mile away This eliminates any possible...

Page 31: ...cation which is 50 power This yields an actual field of 1 or a full degree To convert degrees to feet at 1 000 yards which is more useful for terrestrial observing simply multiply by 52 5 Continuing w...

Page 32: ...n or DEC for short Lines of declination are named for their angular distance above and below the celestial equator The lines are broken down into degrees minutes of arc and seconds of arc Declination...

Page 33: ...never rise and never set You will never see the stars complete one circle because the sunlight during the day washes out the starlight However part of this circular motion of stars in this region of t...

Page 34: ...k that you know faces north 2 Level the tripod There is a bubble level built into the mount for this purpose NOTE Leveling the tripod is only necessary if using this method of polar alignment Perfect...

Page 35: ...of the brightest constellations in the sky it may be difficult to locate from urban areas If this is the case use the two end stars in the bowl of the Big Dipper the pointer stars Draw an imaginary li...

Page 36: ...ing due south insert the diagonal so the eyepiece points straight up Insert the cross hair eyepiece and align the cross hairs so that one is parallel to the declination axis and the other is parallel...

Page 37: ...th he e P Pl la an ne et ts s Other fascinating targets include the five naked eye planets You can see Venus go through its lunar like phases Mars can reveal a host of surface detail and one if not bo...

Page 38: ...ng viewing conditions and the effect they have on observing will help you get the most out of your telescope T Tr ra an ns sp pa ar re en nc cy y Transparency is the clarity of the atmosphere which is...

Page 39: ...stars are pinpoint images Under poor seeing conditions images are blurred and stars appear as blobs The conditions described here apply to both visual and photographic observations Figure 6 1 Seeing...

Page 40: ...you can purchase a used camera body that is not 100 percent functional The light meter for example does not have to be operational since you will be determining the exposure length manually You also...

Page 41: ...s the 35mm SLR camera s normal lens Prime focus photography allows you to capture the entire solar disk if using the proper filter as well as the entire lunar disk To attach your camera to your telesc...

Page 42: ...r camera s field of view M Me et te er ri in ng g The Advanced Series telescope has a fixed aperture and as a result fixed f ratios To properly expose your subjects photographically you need to set yo...

Page 43: ...ignated auto guiding port for use with a CCD autoguider The diagram below may be useful when connecting the CCD camera cable to the telescope and calibrating the autoguider Note that the four outputs...

Page 44: ...ube is NOT sealed the cover should be placed over the opening when not in use This will prevent contaminants from entering the optical tube C Co ol ll li im ma at ti io on n The optical performance of...

Page 45: ...mirror is not centered in the secondary mirror adjust the secondary mirror screws by alternately tightening and loosening them until the periphery of the primary mirror is centered in your view DO NO...

Page 46: ...mm or 4mm Another option is to use a longer focal length ocular with a Barlow lens When a star is in focus it should look like a sharp pinpoint of light If when focusing on the star it is irregular in...

Page 47: ...center of the field of view The star image can then be judged for symmetry by going just inside and outside of exact focus and noting the star s pattern Improvement should be seen if the proper adjust...

Page 48: ...n the following focal lengths 4mm 6mm 9mm 12 5mm 15mm 20mm 25mm 32mm and 40mm X Cel This 6 element design allows each X Cel Eyepiece to have 20mm of eye relief 55 field of view and more than 25mm of l...

Page 49: ...A Celestron s Moon Filter is an economical eyepiece filter for reducing the brightness of the moon and improving contrast so greater detail can be observed on the lunar surface The clear aperture is...

Page 50: ...sky without a map either Even if you already know your way around the major constellations these maps can help you locate all kinds of fascinating objects T Ring The T Ring couples your 35mm SLR came...

Page 51: ...minum 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 Contr...

Page 52: ...asured from due north between the astronomical meridian the vertical line passing through the center of the sky and the north and south points on the horizon and the vertical line containing the celes...

Page 53: ...bright at the end of its life cycle O Open Cluster One of the groupings of stars that are concentrated along the plane of the Milky Way Most have an asymmetrical appearance and are loosely assembled T...

Page 54: ...ing Moon The period of the moon s cycle between new and full when its illuminated portion is increasing Z Zenith The point on the Celestial Sphere directly above the observer Zodiac The zodiac is the...

Page 55: ...6 Mather AFB 121 1 8 38 34 2 Mcclellan 121 2 4 38 40 2 Merced 120 31 2 37 16 8 Miramar NAS 117 9 32 52 2 Modesto 120 57 37 37 8 Moffet 122 3 37 25 2 Mojave 118 9 35 3 Montague 122 31 8 41 43 8 Montere...

Page 56: ...wa 92 27 41 6 Sioux City 96 22 8 42 24 Spencer 95 9 43 10 2 Waterloo Mun 92 2 4 42 33 KANSAS Chanute 95 28 8 37 40 2 Col J Jabar 97 13 2 37 45 Concordia 97 39 39 33 Dodge City 99 58 2 37 46 2 Elkhart...

Page 57: ...ercury 116 1 2 36 37 2 Nellis AFB 115 1 8 36 13 8 Owyhee 116 10 2 42 34 8 Reno 119 46 8 39 30 Tonopah 117 4 8 38 4 2 Wildhorse 116 15 41 19 8 Winnemucca 117 4 8 40 54 Yucca Flat 116 4 8 37 34 8 NEW HA...

Page 58: ...101 27 32 18 Brownsville 97 25 8 25 54 Brownwood 98 57 6 31 47 4 Carswell AFB 97 25 8 32 46 8 Chase NAS 97 40 2 28 22 2 Childress 100 16 8 34 25 8 College Stn 96 22 2 30 34 8 Corpus Chrst 97 3 27 46...

Page 59: ...3 25 e 52 30 n Birmingham England 1 55 w 52 25 n Bombay India 72 48 e 19 0 n Bordeaux France 0 31 w 44 50 n Bremen Germany 8 49 e 53 5 n Brisbane Australia 153 8 e 27 29 s Bristol England 2 35 w 51 28...

Page 60: ...d conflicts with slew limits there will be no action Get Azm Alt Z 12AB 4000 10 characters returned 12AB Azm comma 4000 Alt Get RA Dec E 34AB 12CE Scope must be aligned Cancel Goto M Is Goto in Progre...

Page 61: ...oto Command Through RS232 To The Hand Control note Only valid for motorcontrol version 4 1 or greater 1 Convert the angle position to a 24bit number Example if the desired position is 220 then POSITIO...

Page 62: ...62 APPENDIX E MAPS OF TIME ZONES...

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Page 70: ...ng or unauthorized repair Further product malfunction or deterioration due to normal wear is not covered by this warranty CELESTRON DISCLAIMS ANY WARRANTIES EXPRESS OR IMPLIED WHETHER OF MERCHANTABILI...

Page 71: ...CA 90503 U S A Tel 310 328 9560 Fax 310 212 5835 Web site at http www celestron com Copyright 2003 Celestron All rights reserved Products or instructions may change without notice or obligation Item...

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