Celestron NexStar GPS 93507 manuale d’uso

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[...]

2 INTRODUCTION ................................................................................................................... ........................................ 5 W ARNING .......................................................................................................................................................................[...]

3 Version ........................................................................................................................ ........................................ 26 Get A lt-Az ..................................................................................................................... ...................................... 26 Got[...]

4 APPENDIX E – TI ME ZON E MAP ..................................................................................................... ....................... 64 SKY MAPS ....................................................................................................................... ............................................. 66 OBSERVAT I[...]

5 Congra tulations o n y our purcha se of the Celes tron Nex Star G PS telescope ! The N exStar GPS ushers in the nex t generatio n of compu ter auto mated telescop es. The Ne xStar GP S series, for the first ti me ever i n a co mmercial telesc ope, uses GPS (Globa l Positioning Sys tem) technolog y to ta ke the g uessw ork and eff ort out of alig [...]

6 2 1 3 4 Place t he center le g brace betw een the tri p od le g s and ti g hten t he te nsio n kn ob so t hat t he br ace p ushes ou t a g ainst t he le g s. Loosen t he extensio n clam p at the en d of ea ch tr ipod le g and slide down the inner p orti on of the le g to the desir ed hei g ht. Ti g hten the extensio n clam p to hold the le g s in[...]

7 5 6 7 8 The NexStar will automaticall y p ick an ali g nmen t star and slew the telesco p e close to t hat star. Once the re, the dis p la y wi ll ask you t o use t he a rrow but tons t o aim t he fin ders co p e at the star. If the star is not v isible (perhaps behind a tree), press UNDO to select a new star. Nex t, center the star in the eyepie[...]

8 1 Cont rol P anel (see bel ow ) 7 Optical Tu be 2 Focus Knob 8 Schmidt Correct or Lens 3 Star Diag onal 9 Hand C ontro l 4 Eyepiece 10 Fork Arm 5 Finde rsc ope 11 Carryin g Handle 6 Finderscope Adj ustment Screw 12 Tripod CONTROL PANEL C Auxiliary Port 2 A PC Interface Po rt D 12v Ou tpu t Jack B Auxiliary Port 1 E Auto G uider Port 6 5 4 2 1 9 A[...]

9 The NexStar co mes completel y pre-assembled an d can b e operational in a matter of minu tes. The N exStar and it s accessories are convenie ntly pac kaged in one reusable shipping ca rton while the tripod c omes in its ow n box. Inc lude d with y our NexStar a re the follow ing: • 40mm E yepiece – 1¼ " • 1¼" Star D iagona l ?[...]

10 A A A A A A A A d d d d d d d d j j j j j j j j u u u u u u u u s s s s s s s s t t t t t t t t i i i i i i i i n n n n n n n n g g g g g g g g t t t t t t t t h h h h h h h h e e e e e e e e T T T T T T T T r r r r r r r r i i i i i i i i p p p p p p p p o o o o o o o o d d d d d d d d H H H H H H H H e e e e e e e e i i i i i i i i g g g g g g[...]

11 1. P lace the center hole in the bottom of the telesco pe base over the positioning pin in the center of the tripod plate. 2. Rotate the te lescope base until t he threade d holes a lign with the hol es in the tr ipod head. 3. Threa d the three mounti ng bolts from underneath the tr ipod he ad int o the bottom of the teles cope ba se. T ighten a[...]

12 A A A A A A A A d d d d d d d d j j j j j j j j u u u u u u u u s s s s s s s s t t t t t t t t i i i i i i i i n n n n n n n n g g g g g g g g t t t t t t t t h h h h h h h h e e e e e e e e C C C C C C C C l l l l l l l l u u u u u u u u t t t t t t t t c c c c c c c c h h h h h h h h e e e e e e e e s s s s s s s s The NexSta r GPS has a dual[...]

13 To remove th e eyepiece, lo osen the thu mbscrew on th e star diagonal an d slide th e eyepiece out. Eyepieces ar e common ly referred to by focal len gth and b arrel diameter. Th e focal len gth of eac h eyepi ece is prin ted on the eyepiece barrel. The longer t he focal length (i.e., the larger th e number) the lower th e eyepiece power or mag[...]

14 A A l l i i g g n n i i n n g g t t h h e e F F i i n n d d e e r r s s c c o o p p e e To mak e the alignm ent process a little e asier, y ou should pe rform this task in the day time w hen it is easie r to locate obje cts in the telesc ope without t he f inder. T o align the finder : 1. Choose a c onspic uous objec t that is in exce ss of one [...]

15 1 2 3 4 5 6 7 8 11 12 9 10 The Nex Star has a rem ovable hand c ontroller bu ilt into the si de of t he fork arm designe d to give y ou instant acc ess to all the functions the N exSta r has to off er. With aut oma tic slew ing to ov er 40,00 0 objec ts, an d comm on se nse me nu descri ptions, even a begin ner can master its va riety of feature[...]

16 Planets - A ll 8 planets in our S olar Sy stem plus the Moon. Stars – A compiled list of th e brightest stars fro m the SAO catalo g. List – For quick access, all of the best and most popul ar objects in the NexS tar database h ave been broken down int o lists based o n their ty pe a nd/or com mon na me: Named Stars Comm on name listing of t[...]

17 G G P P S S A A l l i i g g n n m m e e n n t t GPS Alig n must be us ed with the tele scope m ounted in alta zimuth. W ith GPS A lign mode, the NexStar a utomatic ally levels the optic al tube, its bui lt-in elect ronic com pass points the telescope in the direction of the northern horizon, w hile the G PS receiver links with and acquires infor[...]

18 6. After the firs t alignment st ar has been rec orded, the Nex Star w ill automatic ally slew to a second alignment s tar and hav e you re peat the a lignment proc ess f or that s tar. When the teles cope ha s been aligne d to both st ars, the display will read " Alignment Successful" and y ou ar e now r eady to find y our f irst obje[...]

19 Based on this inf ormation, the Ne xStar will automa tically select a bright star tha t is above the horiz on and slew towards it. Once f inished slewing , the display will ask you to use the arrow butto ns to align the selecte d star with the c ross hairs in the center of the f inder scope. If f or som e re ason the c hosen star is not v isible[...]

20 E E Q Q N N o o r r t t h h / / E E Q Q S S o o u u t t h h A A l l i i g g n n m m e e n n t t EQ North and EQ South A lignm ents ass ist the use r in aligning the tele scope w hen polar alig ned on an op tional equa torial we dge. Just as with the A ltazimuth alig nme nts descr ibed earlie r, the EQ a lignm ents give s you the c hoice of perfo[...]

21 8. Fo r your second star alignment , do one o f the follo wing • Select a b right star o r plan et from th e database an d sle w to it. I f it is vi sible in the eyepiece, use t hat object to realign to, rep lacing the remaini ng star when asked to choo se. • Wait a pproxim ate ly 10 m inutes, a nd go thr ough st eps 2- 7 ab ove and a gain u[...]

22 T T T T T T T T o o o o o o o o u u u u u u u u r r r r r r r r M M M M M M M M o o o o o o o o d d d d d d d d e e e e e e e e The Nex Star includes a tour f eature which autom atica lly allows the user to c hoose f rom a list of interesting objects based on the date a nd tim e in whic h you are obse rving. T he autom atic tour w ill display on[...]

23 S S S S S S S S e e e e e e e e t t t t t t t t u u u u u u u u p p p p p p p p P P P P P P P P r r r r r r r r o o o o o o o o c c c c c c c c e e e e e e e e d d d d d d d d u u u u u u u u r r r r r r r r e e e e e e e e s s s s s s s s The N exStar contains m any use r def ined setup f unctio ns desig ned to g ive the user contr ol over the [...]

24 the tim e of observi ng. Since these objects are relative to the loc ation of the telescope, they are only vali d for that exact locati on. To save l and ob jects, once agai n center t he desired object in the eyepiece. Scrol l down to the " Save Land Obj " c ommand and pr ess ENTER. T he display will ask you to enter a num ber betwe e[...]

25 Filter L imi ts – When an a lignment is c omplete, the NexStar a utomatic ally know s which cele stial objec ts are above the horizon. A s a result, w hen scrolling through the databa se lists (or se lecting the Tour func tion), th e NexStar ha nd control will display only those objects t hat are known to be abov e the horizon w hen y ou are o[...]

26 Compass – These compass featu res allow you t o automaticall y move your telesco pe to th e north position an d calibrate north for in creased accurac y of future alignments. • Find Celestial No rth – Automatically finds and m oves the telescope to its true north position. • Calibrate Compass - After completing a su ccessful GP S Alignme[...]

27 ALT- A Z EQ N ORTH EQ SOUT H OFF MOD E SIDEREAL SOLA R LU NA R RA T E TRA CKING VIEW TI ME- SIT E SETUP T IME- SI T E ANTI - BACKLAS H SLE W LI MI T S FI LT ER LIM I T S DIRECTION BUTTONS GOTO APPROAC H A UTO G UIDE RA T E CO RDW RA P SCOPE SET U P GPS ON/OF F COMPAS S ALT SENSO R WED GE ALIG N PEC LIGHT CO NTRO L FACTO RY SE TTIN G VERSI O N GE[...]

28 Figure 5-1 A A c c u u t t a a w w a a y y v v i i e e w w o o f f t t h h e e l l i i g g h h t t p p a a t t h h o o f f t t h h e e S S c c h h m m i i d d t t - - C C a a s s s s e e g g r r a a i i n n o o p p t t i i c c a a l l d d e e s s i i g g n n Actual i mage ori entati on as see n with the unaide d eye Inverted i mage, as view ed w[...]

29 Figure 5-3 The emblem on the end of the focus knob show s the correct rot ational dire ction for focusing the NexStar . F F F F F F F F o o o o o o o o c c c c c c c c u u u u u u u u s s s s s s s s i i i i i i i i n n n n n n n n g g g g g g g g The N exStar' s focusing mechanism controls the prima ry mirror which is mounte d on a ring th[...]

30 thousan d yards. The app arent field o f each eyepiece th at Celestron manufactures is f ound in the Cele stron A ccess ory Cata log (#93 685) . G G G G G G G G e e e e e e e e n n n n n n n n e e e e e e e e r r r r r r r r a a a a a a a a l l l l l l l l O O O O O O O O b b b b b b b b s s s s s s s s e e e e e e e e r r r r r r r r v v v v v [...]

31 Up to this point, t his m anual cov ered the asse mbly and basic opera tion of y our Ne xStar te lescope . How ever, to u ndersta nd your te lescope more thoroughly , you need to kn ow a little about the nig ht sky. This se ction deals w ith observationa l astronom y in g eneral a nd inclu des inf orma tion on the night sky and polar alignm ent.[...]

32 M M M M M M M M o o o o o o o o t t t t t t t t i i i i i i i i o o o o o o o o n n n n n n n n o o o o o o o o f f f f f f f f t t t t t t t t h h h h h h h h e e e e e e e e S S S S S S S S t t t t t t t t a a a a a a a a r r r r r r r r s s s s s s s s The daily motion of the Su n across the sky is fam iliar to even the m ost casual observ er[...]

33 P P P P P P P P o o o o o o o o l l l l l l l l a a a a a a a a r r r r r r r r A A A A A A A A l l l l l l l l i i i i i i i i g g g g g g g g n n n n n n n n m m m m m m m m e e e e e e e e n n n n n n n n t t t t t t t t ( ( ( ( ( ( ( ( w w w w w w w w i i i i i i i i t t t t t t t t h h h h h h h h o o o o o o o o p p p p p p p p t t t t t t[...]

34 Little Dipper. T hey point to P olaris (see Fig ure 6-6). T he position of the Big Dippe r chan ges during the yea r and throug hout the course of the night (see Fig ure 6- 5). W hen the B ig D ipper is low in the sky (i.e ., near the horiz on), it m ay be difficult to locate. Durin g these times, look for Cassio peia (see Figure 6 -6). Observer[...]

35 • If the sta r drifts south, the polar a xis is too fa r east. • If the star drifts north, t he polar axis is too f ar w est. Make the appropriate a djustments to the polar axis to elim inate any drif t. Once y ou have elimina ted all the drift, m ove to the star near th e eastern horizon . The star should be 20 degrees ab ove the ho rizon a[...]

36 With y our teles cope se t up, you are r eady to us e it for obs erving . T his sec tion covers visual obser ving hints f or both solar sy stem and deep sky objects a s well a s general obser ving conditio ns which w ill affe ct your ability to observe . O O O O O O O O b b b b b b b b s s s s s s s s e e e e e e e e r r r r r r r r v v v v v v [...]

37 O O O O O O O O b b b b b b b b s s s s s s s s e e e e e e e e r r r r r r r r v v v v v v v v i i i i i i i i n n n n n n n n g g g g g g g g t t t t t t t t h h h h h h h h e e e e e e e e S S S S S S S S u u u u u u u u n n n n n n n n Althoug h overlo oked by m any am ateur a stronom ers, s olar obs erva tion is both rew arding and fun. How[...]

38 polluted a reas by bloc king unw anted light w hile transm itting light from certa in deep sky obje cts. You can, on the ot her hand, o bserv e planets a nd stars from light poll uted are as or w hen the Mo on is out. S S S S S S S S e e e e e e e e e e e e e e e e i i i i i i i i n n n n n n n n g g g g g g g g Seeing conditio ns refe rs to the[...]

39 Afte r looking at the night sky for a while you may want to tr y photog raphing it. Se veral f orms of celestial phot ogra phy are possib le with your t elescope, in cluding sho rt exposu re prime focus, e yepiece proj ection , long exposu re deep sky, terres trial and ev en CCD imaging. Each of the se is disc ussed in m oderate deta il with eno[...]

40 2. Center the Moon i n the f ield of your Ne xStar te lescope . 3. Focus the telesc ope by tur ning th e focus knob until the ima ge is s harp. 4. Set the shutter spe ed to the appropriate setting (see ta ble below ). 5. Trip the shut ter using a cabl e release. 6. Advanc e the fil m and repeat t he process. Luna r Pha se ISO 50 ISO 100 ISO 200 [...]

41 2. Turn the focus kn ob until th e image is as sharp as po ssible. 3. P lace the bl ack card over the fro nt of the telesco pe. 4. Release t he shut ter using a cabl e release. 5. Wait f or the v ibration caus ed by relea sing the s hutter t o dimi nish. A lso, wait f or a mom ent of g ood se eing. 6. Re move the black card from in fro nt of the[...]

42 1. Polar alig n the tele scope using a n optio nal equat orial w edge . To polar a lign the NexSta r you m ust sele ct EQ North Alig n (or EO Sout h Alig n) from the alignm ent options. For m ore inf ormation on p olar alignin g, see the Polar A lignme nt section earli er in the manua l. 2. Re move all visual acc essories. 3. Threa d the Radial [...]

43 Note: When recording PEC only the photo gui de rates (rate s 1 and 2) w ill be ope rational. T his elimina tes the possibi lity of moving the teles cope sudde nly while recording . 5. To begin re cording the drive' s periodic err or, press the MENU button a nd select PEC from the Utilities menu. Use the Up/Dow n scroll but tons to dis play [...]

44 M M e e t t e e r r i i n n g g The N exStar has a fixed a perture and, a s a res ult, fixed f /ratios. T o properly expose your subjec ts photogra phica lly, y ou need to s et y our shutter speed ac cording ly. Mos t 35m m SL R camera s off er through-t he-lens me tering w hich lets y ou know if your pic ture is under or ove rex posed. Adjust m[...]

45 The a bove f igure s hows how the s econdar y m irror is r emove d when usi ng the optiona l CC D cam era at f /2 and t he Fastar Lens Assembly. Warning: T he seconda ry mirror s hould ne ver be re move d unless i nstalling t he optio nal Fasta r Lens Assem bly. Adjust ments to coll im ation can ea sily be made by turning the scre ws on the top [...]

46 exposu re time needed about 25 times short er than at f/10 , the field of vie w 5 times larger and the ob ject size 1/5 compared to that of f/10. (see Tabl e below) Telescope Model Standard Casseg rain f/10 With Reducer/Corrector f/6.3 With Fastar Lens Accessory f/2 NexStar 8 GPS 80" ( 2032m m) 50.4" ( 1280mm) 16" ( 406. 4mm) Foca[...]

47 A A u u t t o o G G u u i i d d i i n n g g The NexStar GPS has a d esignated auto guiding po rt for use with a CCD aut oguider. Th e diagram belo w may be useful when connect ing the CCD camera cabl e to th e NexStar and calib rating th e autoguid er. Note that th e four output s are active-lo w, with i nternal pul l-ups and are capable o f sin[...]

48 While your Ne xStar telesc ope requires little m aintenanc e, there are a few things to rem ember that w ill ensure your te lescope perf orms at its best. C C C C C C C C a a a a a a a a r r r r r r r r e e e e e e e e a a a a a a a a n n n n n n n n d d d d d d d d C C C C C C C C l l l l l l l l e e e e e e e e a a a a a a a a n n n n n n n n [...]

49 Figure 9- 3 A coll im ated teles cop e should appe ar symm etrical with th e centr al obstru ction center ed in t he star 's diffrac tion pattern. To accomplish this, you need to tighten the second ary collim ation screw(s) that move the star across the field toward the direction of the s kew ed light. T hese s crews a re locate d in the se[...]

50 You will find that additional accessories enha nce your vie wing pleasure and expand the u sefulness of your telescop e. For ease of refere nce, all the acce ssories are listed i n alphab etical or der. Adapter, C ar Bat tery (# 18769) - Celestron of fers the Car Ba ttery Adapter that allow s you to run th e NexStar driv e off an external power [...]

51 • Lanthanum Eyep ieces (LV S eries) - L anthanum is a unique rar e ear th glass used in one of the f ield lense s of this new eyepiece. The Lanth anum glass red uces aberration s to a minimum. All are fully multicoated an d have an ast ounding 20mm of eye reli ef — per fect for e yeglass wearers ! In th e 1-1/4" b arrel diamet er, they [...]

52 Rad ial Gu ider (#94176) - The Celestron Radial Guider ® is specifi cally designed for use in prim e f ocus, dee p sky astr ophotogr aphy and take s the pl ace of the T-Adapter. This devic e allow s you to phot ograph a nd gui de sim ultane ously through the opt ical tube assem bly of your te lescope . This type of guiding pro duces t he best r[...]

53 Appendix A - T echnical S pecifica tions Optical Sp ecification Ne xStar 8 GPS NexSta r 11 GPS Des ign Schm idt-Ca sseg rain Cata dio ptric Schm idt-Ca sseg rain Cata dio ptric Ape rture 8" (2 03.2m m) 11" (279m m) Focal Length 2032m m 2800m m F/rat io of t he Opti cal Syst em 10 10 Primar y Mir ror: Ma terial Coati ngs Fine A nneal ed[...]

54 Appendix B - Glossar y of T erms A - Absolute magnitude The a pparent m agnitude that a st ar w ould hav e if it were obs erve d from a standar d distance of 10 parsec s, or 32.6 light-y ears . The absolute magnitude of the Sun is 4.8. at a dista nce of 10 parse cs, it would jus t be v isible on Eart h on a cle ar moonles s night aw ay from s ur[...]

55 J - Jovian P lanets Any of the fou r gas giant p lanets that are at a greater dist ance form the su n than th e terrestrial planet s. K - Kuiper Be lt A reg ion bey ond the or bit of Neptune e xtendi ng to a bout 100 0 AU w hich is a s ource of ma ny short period c ome ts. L - Light-Year ( LY) A light- year is the d istance li ght traverses in a[...]

56 telescop e at this rat e. The rate is 15 arc seco nds per second or 15 degrees per h our. T - Term inator The bou ndary line betw een the light a nd dark portio n of the m oon or a pla net. U - Univers e The totality of astronom ical thing s, events , relations an d energ ies capa ble of being describe d object ively. V - Variab le Star A star w[...]

57 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 LA TI TU DE degrees min degrees min AL ABA MA Anniston 85 51 33 34.8 Auburn 85 26.4 32 40.2 Birmingham 86 45 33 34.2 Centrevil le 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[...]

58 LONGITUDE LA TI TU DE 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 Panam a 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 Tallahasse[...]

59 LONGITUDE LA TI TU DE 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 M uni 94 55.8 47 30 Brainerd-C rw 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 9[...]

60 LONGITUDE LA TI TU DE degrees min degrees min OKLAHOMA Altus AFB 99 16.2 34 40.2 Ardm ore 97 1.2 34 18 Bartlesville 96 0 36 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 Norm an 97 28.2 35 13.8 Oklahoma 97 3.6 35 24 Page 94 37.2 34 40.8 Ponc[...]

61 LONGITUDE LA TI TU DE 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.[...]

62 Appendix D - RS-232 C onnecti on You can c ontrol y our Ne xStar te lescope with a c omputer via the R S-232 port on the c om puterized h and co ntrol and using a n optiona l RS-2 32 ca ble (#939 20). Once conne cted, the Nex Star ca n be contro lled us ing pop ular a stronomy softw are pr ogram s. C C o o m m m m u u n n i i c c a a t t i i o o[...]

63 Additional RS23 2 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 des ired trac king ra te (arc seconds/s econd) by 4. Ex ample: if the des ired tr ackra te is 150 arcs econds/s econd, then TR A[...]

64 A PPENDIX E – MAPS OF TIME ZONES[...]

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72 Obser v ati onal Dat a Sheet Yearly Meteor Show ers Shower Da te Peak Hourly Rate Quadrantids Jan 01-Jan 05 4-Jan 60-200 Lyrids Apr 16-Apr 25 21-Apr 15 pi-Puppids Apr 15-Apr 28 23-Apr Var. eta-Aquarids Apr 19-May 28 5-May 60 June Bootids Jun 26-Jul 02 27-J un Var. July Phoenici ds Jul 10-Jul 16 13-Jul V ar. Southern delt a-Aquarids Jul 12-Aug 19[...]

CELESTRON TWO YEAR WAR RANTY A. Cel es tron wa rrants th is tel esco pe to be free from de fects in m ate rials an d w orkmans hip f or tw o ye ars. Cele stro n will repa ir or repl ace such pr oduc t or par t the reo f which, upo n ins pect ion by Cele stron, is found to be def ectiv e in mate rials or workmans hip . As a con diti on to th e obli [...]

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