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Celestron C100ED-R - page 1
A A d d v v a a n n c c e e d d S S e e r r i i e e s s A A d d v v a a n n c c e e d d S S e e r r i i e e s s G G G T T T I I N N S S T T R R U U C C T T I I O O N N M M A A N N U U A A L L C C 8 8 0 0 E E D D - - R R ● ● C C 1 1 0 0 0 0 E E D D - - R R ...
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Celestron C100ED-R - page 2
2 INTRODUCTI ON............ ............. ............... ............... ........... ................ ............ ............... ...... ......... .... ....... .....4 Warning ........................................................................................................................ .............................. 4 ASSEMBLY .......... ...
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Celestron C100ED-R - page 3
3 Light Control .................................................................................................................. .................. 27 Factory Settin gs ............................................................................................................... ................. 27 Version ...................................... ...
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Celestron C100ED-R - page 4
4 Congratulations on your purchase of the Cele stron Advanced Series telescope (AST)! Th e Advanced Series of telescopes come in standard (non-computerized) and computer ized GT models. The Advanced Series is made of the hi ghest quality materials t o ensure stability and durability. All this adds up to a telescope that gives you a lifetime of plea ...
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Celestron C100ED-R - page 5
5 Fig 1-2 - The Advanced GT Series C80-GT Show n 1. Objective Lens 10. Focuser 2. Declination Motor Drive 11. Diagonal 3. RA /Dec locks 12. Eyepiece 4. Counterweight Bar 13. Finderscope 5. Counterweights CONTROL PANEL 6. Center Leg Brace / Accessory Tray A. Hand Control Port 7. 2" Steel Tripod B. Dec Motor Port 8. Hand Control C. Autoguide Por ...
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Celestron C100ED-R - page 6
6 This section covers the assembly in structions for your Ce lestron Advanced Se ries Telescope ( AST). Y our AST telescope should be set up indoor the first time so that it is easy to identify th e various parts and fam iliarize yourself with the correct assembly procedure before attempting it ou tdo or. 21021/21022 21026 / 21027 C80ED-R C100ED-R ...
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Celestron C100ED-R - page 7
7 attaches to the t ripod head. On one side of the tripod head there is a metal al ignment peg f or aligning the mount. This side of the tripod will face no rth when setting up for an astronom ical observing session. To attach the equatorial head: 1. Locate the azim uth adjustment scre ws on t he equatorial mount. 2. Retract the screws s o they no ...
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Celestron C100ED-R - page 8
8 I I n n s s t t a a l l l l i i n n g g t t h h e e C C o o u u n n t t e e r r w w e e i i g g h h t t The Advance d Equatorial m ount come s with either o ne or two counte rweights (depe nding on the m odel). To install the counterweight(s): 1. Orient the mount so that the coun terweight bar points toward the ground . 2. Remove the counterwei g ...
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Celestron C100ED-R - page 9
9 4. Slide the R.A. slow motion knob onto the R.A. shaft. The knob is a tension fit, so sliding it on holds it in place . As m entioned above, there are two R.A. shafts, one on either side of t he mount. It makes no diffe rence which sh aft you use since b oth work the sam e. Use whicheve r one you find more conve nient. If, after a few observi ng ...
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Celestron C100ED-R - page 10
10 T T h h e e O O p p t t i i c c a a l l T T u u b b e e Installing the Finderscope To install the fi nderscope onto the tel escope you m ust first m ount the find erscope throug h the finde r bracket an d then attach it to th e telescop e. Toward the rear of the telescope tube, near the focusing assembly, there is a small bracket with a set scre ...
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Celestron C100ED-R - page 11
11 Installing the Eyepieces The eyepiece, or ocular as it is also ca lled, is an optical element that magnifi es the image focuse d by the telescope. Without the eyepiece it would be impossible to use the telescope visually. The eye piece fits di rectly into the focuser. To attach an ocular: 1. Loosen the set screw on the e yepiece adapter so that ...
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Celestron C100ED-R - page 12
12 Balancing the Telescope in DEC The telescope should also be balanced on the declination axis to prevent any sudd en motions when the DEC clamp (Fig 2-5) is released. To balance the telescope in DEC: 1. Release the R. A. clamp and rotate the telesc ope so that i t is on one side of the m ount (i.e., as described in the previous section on balan c ...
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Celestron C100ED-R - page 13
13 Adjusting the Mount in Altitude • To i ncrease the latitude of the po lar axis, tighten the rear latit ude adjustm ent screw and loosen t he front sc rew (if necessary). • To decrease the latitude of the polar axis, tigh ten the fr ont (under the counterweight bar) latitude ad justment screw and loosen the rear screw (if necessary). The lati ...
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Celestron C100ED-R - page 14
14 Locate the Declination cable and plug one end of the cab le into the port on the electronics panel labe led DEC Port and plug the other end of the cable int o the port l o cated on the declination mo tor drive (see Fig 2-15) . P P o o w w e e r r i i n n g g t t h h e e T T e e l l e e s s c c o o p p e e The Advanced GT can be powered by t he s ...
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Celestron C100ED-R - page 15
15 The Advance d Series GT, com puterized ver sion of each tel escope has a ha nd controller designed to gi ve you insta nt access to all the functions that your telescope has to offer. With autom atic slewing to over 40,000 objects, and common sense menu descript ions, e ven a beginner can master its va riety of features i n just a few o bserving ...
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Celestron C100ED-R - page 16
16 4. Catalo g Keys: The Adva nced Series has keys on the hand contr ol to allow di rect access to each of the catalogs in its database. The ha nd control contains the following catalog s in its database: Messier – Complete list of all Messier objects. NGC – Complete list of all the deep-sky objects in th e Revised New General Catalog. Caldwell ...
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Celestron C100ED-R - page 17
17 A A l l i i g g n n m m e e n n t t P P r r o o c c e e d d u u r r e e s s In order for the telescope to accurately poi nt to objects in the sky, it must first be a ligned to three known positions (stars) in the sky. With th is information, the telescope can create a model of the sky, which it uses to locate any object with known coordinates. T ...
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Celestron C100ED-R - page 18
18 4. Select one o f the four al ignment m ethods as desc ribed belo w. Note: If incorrect information is entered into the hand con trol, the UNDO button acts like a back space butto n allowing the user to re-enter t he correct data. A A u u t t o o A A l l i i g g n n Auto Align allows the telescope to automatically choose three stars (two on one ...
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Celestron C100ED-R - page 19
19 the eyepiece, pressing ENTER when complete. NOTE: Although the telescope allows the user to select the alig n ment stars, for best all-sky pointing accuracy it is still ne ce ssary to select two alignment stars on one side of the Meridian and the third star on th e opposite side of the Meridian. For this re ason, the hand control will onl y disp ...
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Celestron C100ED-R - page 20
20 O O b b j j e e c c t t C C a a t t a a l l o o g g Selecting an Object Now that the telescope is properly aligned, you can choose an object from any of the catalogs in the telescope' s extensive database. The hand co ntrol has a k ey (4) designat ed for each of the catalogs i n its database. Th ere are two ways to select ob jects from the ...
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Celestron C100ED-R - page 21
21 Tour Mode The Advanced Series telescopes incl ude a tour feature which aut omatically allo ws the user to choose from a list of interesting objects based on the date and time in which you are observing. Th e automatic tour will display only those objects that are within your set filter limits (see Filter Limits in the Setup Proce dures section o ...
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Celestron C100ED-R - page 22
22 1 = .5x 6 = 64x 2 = 1x (si dereal) 7 = .5º / sec 3 = 4x 8 = 2º / sec 4 = 8x 9 = 3º / sec 5 = 16x S S e e t t u u p p P P r r o o c c e e d d u u r r e e s s The Advance d GT contai ns many user defined setup func tions designe d to give t he user cont rol over t he telescope's many advanced features. All of t he setup and utility feature ...
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Celestron C100ED-R - page 23
23 that is not includ ed in the regular database. There are several ways to save an object to memory depe nding on w hat type of object it is: GoTo Object: To go to any of the user defined o bjects stored in t he database, scrol l down to either GoTo Sky Obj or Goto Land Obj and enter the number of the object you wish to select and press ENTER. The ...
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Celestron C100ED-R - page 24
24 Note: Some of the databases contain thousa nds of objects , and can the refore take seve ral mi nutes to return t he closest objects. Precise GoTo The Advance d Series telescope s have a preci se goto function t hat can assist in finding ext remely faint objects and centering objects closer to the center of the field of vi ew for ast rophotogra ...
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Celestron C100ED-R - page 25
25 example, if yo u are observing fr om a mountainous locati on where the horiz on is parti ally obscured, you can set your minimum altitud e limit to read +20º. Th is will make sure that the hand control only displays objects th at are higher in altitude than 20º. If you want to explore the entire ob ject database, set the maximum altitude limit ...
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Celestron C100ED-R - page 26
26 in R.A. (azimuth) until it reach es the point that the cables are extended to their maximum. Then by displaying the telescopes azimuth in this p osition (by looking at Get Alt-Az under the Utilities menu) you can determ ine the telescopes azimuth at its most exten ded position. Enter this azimuth reading for eith er the maximum or minimum azimut ...
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Celestron C100ED-R - page 27
27 should be. Use the e quatorial head latitude and azimuth ad justments to pl ace Polaris in th e center of the eyepiece. Do not use the direction buttons to pos ition Polaris. Once Polaris is cente red in the eyepiece press ENTER; the polar axis should th en be pointed towards the North Celestial Pole. Light Control – This featu re allows y ou ...
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Celestron C100ED-R - page 28
28 EQ NOR TH EQ SOUT H OFF MOD E SIDE REAL SOLA R LUN AR RA T E TRA CKIN G VIEW T I ME-S IT E SETU P T IM E- SIT E ANT I- BACKLAS H FILTER LIMIT S DIRECTIO N B UTTO NS GOTO APPR OAC H AUT OGUID E RAT E AZIMUTH L IMITS EAST/ WEST FIL TER IN G SCO PE SETU P CALI BRA TE GOT O HOME POSIT ION POLAR ALIG N LIG HT CO NTROL FACT O RY S ET TING VERSIO N GET ...
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Celestron C100ED-R - page 29
29 Actual image orientation as seen with the unaided eye Inverted image, as viewed with the eyepiece dir ectly in telescope Reversed from left to right, as viewed with a Star Diagonal A telescope is an instrum ent that collects and fo cuses light. Th e nature of the optical design determines how the light is fo c used. Some telescopes, known as ref ...
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Celestron C100ED-R - page 30
30 F F o o c c u u s s i i n n g g To focus your telescope, simply turn the focus knob located directly below the focu ser. Turning the knob clockwise allows you to focus on a n object that is fart he r than the one you are curren tly observing. Turning the knob counter c lockw ise from you allows you to focus on an object closer than th e on e you ...
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Celestron C100ED-R - page 31
31 magnifica tion, most observing is done in the range of 20 to 35 power for every inch of aperture which for the 80ED is 64 to 112. Determining Field of View Determining the field of view is important if you want to get an idea of the angular size of the object you are obs erving. To calculate the actual fie ld of view, divide the apparent field o ...
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Celestron C100ED-R - page 32
32 Up to this point, this manual covered the assembly and ba sic operation of your telescope . However, to understand your telescope more thoroughly, you need to know a little abou t the night sky. This section deals with observational astronomy in general and includ es informa tion on the night sky and polar alignment. The Celestial Coordinate Sys ...
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Celestron C100ED-R - page 33
33 Motion of the Stars The daily motio n of the Sun across the sky is familiar to even the most casual observer. This daily trek is not the Sun moving as early astronomers thought, but the result of the Earth ' s rotation. The Earth's rotation also causes the stars to do the same, scribing out a large circle as the Earth completes one rot ...
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Celestron C100ED-R - page 34
34 Latitude Scales The easiest way to polar align a telescop e is with a latitude scale. Unlike other methods th at require you to find the celestial pole by iden tif ying certain stars near it, this method works off of a known constant to determine how high the polar axis should be pointed. The A dvanced Series mount can be adjusted from 30 to 60 ...
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Celestron C100ED-R - page 35
35 Remember, while Polar aligning, do NOT move the telescop e in R.A. or DEC. You do not want to move the telescope itself, but the polar axis. The telescope is used simpl y to see where the polar axis is pointing. Like the previous method, this gets yo u close to the pole but not directly on it. The following methods help improve your accuracy for ...
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Celestron C100ED-R - page 36
36 D D e e c c l l i i n n a a t t i i o o n n D D r r i i f f t t M M e e t t h h o o d d o o f f P P o o l l a a r r A A l l i i g g n n m m e e n n t t This method of polar alignment allows you to get the most accurate alignment on the cel estial pole and is required if you want to do long exposure deep-sk y astrophotography through the telescop ...
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Celestron C100ED-R - page 37
37 With your telescope set up, you are r eady to use it for obser ving. This section covers visual obs erving hints for both solar system and deep sky objects as well as general obser ving conditions which will affect your ability to observe. Observing the Moon Often, it is tempting to look at the Moon when it is full. At this time, the face we see ...
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Celestron C100ED-R - page 38
38 For safe solar viewing, use a sol ar filter that reduces the int e nsity of the Sun ' s light, m aking it safe to view. With a filter you can see sunspots as they move across the solar disk and faculae, which are bright patches seen near the Sun's edge. Solar Observing Hints • The best time to observe th e Sun is in the early morning ...
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Celestron C100ED-R - page 39
39 disturbances vary from time-to-time and place-to-place. The size of the air parcels compared to your apert ure determines the "seeing" qualit y. Under good seeing conditions, fi ne detail is visible on the brighter planets like Jupiter and Mars, and stars are pinpoint images. Under p oor seeing c onditions, images are blurred an d star ...
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Celestron C100ED-R - page 40
40 After looking at the night sky for a while you may want to try photographing it. Several forms of photography are possible with your telescope, including terr estrial and celestial ph otography. Both of these are discussed in moderate detail with enough information to get you started. Topics in clud e the accessories required a nd some simple te ...
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Celestron C100ED-R - page 41
41 5. Locate the area of the sky that you want to photog raph and m ove the telescope so that it points in that direction. 6. Find a suitable guide star in t h e telescope eyepiece field of view. This is relatively easy since you ca n search a wide area without affecting the area cove red by your cam era lens. If you do not have an illuminated cros ...
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Celestron C100ED-R - page 42
42 6. Advance the film and repeat the process. Lunar Phase ISO 50 ISO 100 ISO 200 ISO 400 Crescent 1/2 1/4 1/8 1/15 Quarter 1/15 1/30 1/60 1/125 Full 1/30 1/60 1/125 1/250 The exposure times listed in table 7-1 should be used as a st arting point. Always make exposures that are longer and shorter than the recommended time. Also, take a few photos a ...
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Celestron C100ED-R - page 43
43 Auto Guiding The Advanced GT telescope has a designated auto gu iding port for use with a CCD autoguider. The diagram below may be useful when connecting th e CCD camera cable to the telescope and calibrating the autoguider. No t e that the fo u r out put s are active-low, with internal pu ll-ups and are capable of sinking 25 mA DC. ...
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Celestron C100ED-R - page 44
44 While your teles cope requires little main tenance, there are a few things to remember that will e nsure your telescope performs at its best. C C a a r r e e a a n n d d C C l l e e a a n n i i n n g g o o f f t t h h e e O O p p t t i i c c s s Occasionally, dust and/or mo isture may build up on the obje c ti ve lens of y our telescope. Special ...
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Celestron C100ED-R - page 45
45 You will find that additional accessories enhance your viewi ng pleasure and exp and the usefulness of your telescope. For ease of referen ce, all the acc essories are listed in alphabe tical order. Auxiliary Port Accessory (#93965) – This accessor y plugs into the auxiliar y port of the telescopes control panel to provide additional ports for ...
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Celestron C100ED-R - page 46
46 Flashlight , Night Vision - (#93588) - Celestron’s premium model for astronomy, using two red LED ' s to preserve night vision better than red filters or other dev i ces. Brightness is adjust able. Operates on a single 9 volt battery (included). CN16 GPS Accessory (#93963 ) - Plug in this 16-channel GPS module into yo u r telescopes drive ...
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Celestron C100ED-R - page 47
47 Appendix A – Technical Specifications Advanced Series 21021 / 21022 21026 / 21027 Specifications: Optical Design 80mm (3.2") refractor 100mm (4") refractor Focal Length 600mm F/7.5 900mm F/9 Finderscope 6x30 9x50 Mount CG-5 Equatorial CG-5 Equatorial Eyepiece 20mm – 1.25" (30x) 20mm – 1.25" (45x) Accessory tray Yes Yes ...
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Celestron C100ED-R - page 48
48 Appendix B - Glossary of Terms A - Absolute magnitude The apparent magnit ude that a star would have if it were observed from a standard distance of 10 parsecs, or 32.6 light-years. The absolute magnitu de of the Sun is 4. 8. at a distance of 10 parsecs, it would just be visible on Earth on a clear moonless night away from surface light. Airy di ...
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Celestron C100ED-R - page 49
49 J - Jovian Planets Any of the four gas giant planets tha t are at a greater distance for m the sun than the terrestrial planets. K - Kuiper Belt A region beyond the orbit of Neptune extend ing to about 1000 AU which is a source of many short period comets. L - Light-Year (LY) A light-year is the distance light traverses in a v acuum in one year ...
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Celestron C100ED-R - page 50
50 telescope at this rate. The rate is 15 ar c seconds per second or 15 degrees per hour. T - Terminator The boundary line between the light and dark por tion of the moon or a planet. U - Universe The totality of astronomi cal things, events, relatio ns and en ergies capable of being described objectively. V - Variable Star A star whose brightness ...
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Celestron C100ED-R - page 51
51 A A P P P P E E N N D D I I X X C C L L O O N N G G I I T T U U D D E E S S A A N N D D L L A A T T I I T T U U D D E E S S LONGITUDE LATITUDE degrees min degrees min AL ABAM A Anniston 85 51 33 34.8 Auburn 85 26.4 32 40.2 Birmingham 86 45 33 34.2 Centreville 87 15 32 54 Dothan 85 27 31 19.2 Fort Rucker 85 43.2 31 16.8 Gadsden 86 5.4 33 58.2 Hun ...
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Celestron C100ED-R - page 52
52 LONGITUDE LATITUDE degrees min degrees min Melbourne 80 37.8 28 6 Miami 80 16.8 25 49.2 Naples 81 4.8 26 7.8 Nasa Shuttle 80 40.8 28 37.2 Orlando 81 19.2 28 25.8 Panama City 85 40.8 30 12 Patrick AFB 80 3.6 28 13.8 Pensacola 87 19.2 30 21 Ruskin 82 3.6 27 58.2 Saint Peters 82 40.8 27 55.2 Sanford 81 15 28 46.8 Sarasota 82 33 27 24 Tallahassee 84 ...
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Celestron C100ED-R - page 53
53 LONGITUDE LATITUDE degrees min degrees min Wurtsmith 83 2.4 44 27 Ypsilanti 83 31.8 42 13.8 MINNESOTA Albert Lea 93 22.2 43 40.8 Alexandria 95 22.8 45 52.2 Bemidji Muni 94 55.8 47 30 Brainerd-Crw 94 7.8 46 24 Detroit Laks 95 52.8 46 49.2 Duluth 92 10.8 46 49.8 Ely 91 49.2 47 54 Fairmont 94 25.2 43 39 Fergus Falls 96 4.2 46 18 Grand Rapids 93 31. ...
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Celestron C100ED-R - page 54
54 LONGITUDE LATITUDE degrees min degrees min OKLAHOMA Altus AFB 99 16.2 34 40.2 Ardmore 97 1.2 34 18 Bartlesville 96 0 3 6 45 Clinton 99 1 .2 35 21 Enid 97 4.8 36 22.8 Fort Sill 98 2 .4 34 39 Gage 99 46.2 36 18 Hobart 99 3 35 0 Lawton 98 25.2 34 34.2 Mcalester 95 46.8 34 52.8 Norman 97 28.2 35 13.8 Oklahoma 97 3.6 35 24 Page 94 37.2 34 40.8 Ponca ...
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Celestron C100ED-R - page 55
55 LONGITUDE LATITUDE degrees min degrees min Walla Walla 118 16.8 46 6 Wenatchee 120 1.2 47 24 Whidbey Is 122 39 48 21 Yakima 120 31.8 46 34.2 WEST VIRGINIA Beckley 81 7.2 37 46.8 Bluefield 81 13.2 37 18 Charleston 81 3.6 38 22.2 Clarksburg 80 13.8 39 16.8 Elkins 79 51 38 52.8 Huntington 82 33 38 22.2 Lewisburg 80 2.4 37 52.2 Martinsburg 77 58.8 3 ...
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Celestron C100ED-R - page 56
56 Appendix D - RS-232 Connection You can control your telescope with a computer via the RS-232 port on the computerized hand control and using an optional RS-232 cable (#93920). Once connected , the telesc ope can be controlled using popular astronomy software programs. Communication Protocol: The Advanced GT communicates at 9600 b its/sec, No par ...
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Celestron C100ED-R - page 57
57 Additional RS232 Commands S S e e n n d d A A n n y y T T r r a a c c k k R R a a t t e e T T h h r r o o u u g g h h R R S S 2 2 3 3 2 2 T T o o T T h h e e H H a a n n d d C C o o n n t t r r o o l l 1. Multiply the desired tracking rate (arcseconds/second) b y 4. Example: if the desired trackrate is 150 arcseconds/second, then TRACKRATE = 600 ...
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Celestron C100ED-R - page 58
58 APPENDIX E – MAPS OF TIME ZONES ...
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Celestron C100ED-R - page 66
66 CELESTRON TWO YEAR WARRANTY A. Celestron wa rrants this telescope to be free from defects in materials and workma nship for two years. Celest ron will repa ir or replace such product or part thereof which, upon inspe ction by Celestron, is found to be defective in materials or workmanship . As a condition to the obligation of Celest ron to repai ...
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Celestron C100ED-R - page 67
Celestron 2835 Columbia Street Torrance, 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 o r obligation.) Item # 21021-INST Printed in China $10.00 07-05 ...
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