Celestron NexStar GT manual

Cele stron In tern ation al , 2835 C olumbia S treet, Torra nce, CA 90503 • Phone (310) 328- 9560 • Fax ( 310) 212-58 35 Addendum For NexStar GT H and Control S ection O f The Owner's Manu al. The follow ing is an add endum to the NexStar G T section o f the owner' s manual that ex plains the current operation an d added f eatures to [...]

2 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 The Ne xStar GT's ha nd controlle r is desig ned to give you insta nt acc ess to all the func tions t he NexSta r has to off er. With autom atic slewing to over 4, 000 obje cts, and c omm on sense menu des cripti ons, e ven a beginn er ca n mast er its var iety of feature s in just a fe[...]

3 4. Catalog Keys: The NexStar has a key on th e hand con trol to allow direct acce ss to each of th e catalo gs in its 4,000+ obje ct databa se. The Nex Star contai ns the follow ing ca talog s in its databas e: Messier – Complete list of all Me ssie r objects. NGC – Many of the brightest deep sky obje cts from the Revise d New Genera l Catalo[...]

4 1. Once the N exStar is p owered on the d isplay will read NexS tar Rea dy .P r e s s ENTER to begin alig nment. The first tim e that the NexSta r is used, it will reque st information to help iden tify the m odel of te lescope. Once powe red on, the hand c ontrol w ill display t he mess age Se lect Model Select Mode l Select Mode l Select Mode l[...]

5 the Star Pointer finde r. Once finished slewing, the display will ask you to use the arrow buttons to align the selecte d star with the red dot in the c enter of the Sta r Pointer. If for some re ason the chose n star is not visible ( perhaps beh ind a tree or build ing) you can press UND O to select and slew to a di fferent star. On ce centered [...]

6 3. T he hand c ontrol w ill the n ask you to in put all t he sa me time and loca tion inf orm ation as y ou would f or the AutoA lign procedure . Once entered, the Ne xStar will m odel the sky based on this inf ormation and display Alignment Successful Alignment Successful Alignment Successful Alignment Successful . N N e e x x S S t t a a r r R [...]

7 S S l l e e w w i i n n g g t t o o a a n n O O b b j j e e c c t t Once the desired object is display ed on the han d control scree n, you ha ve tw o options : • • • • Press the INFO Key . This will g ive y ou useful i nforma tion about the s elect ed object suc h as mag nitude, constellatio n and f ascinating facts abou t ma ny of the o[...]

8 R R a a t t e e B B u u t t t t o o n n Pressing the RATE key (11) allows you to instantly change the speed rate of the motors from high speed slew ra te to preci se guiding ra te or anyw here in betwe en. Each rate cor respon ds to a number on the han d controlle r key pa d. The numbe r 9 is the faste st rate (a pproxim ately 4º pe r second, de[...]

9 Sidereal T ime – Displays the Sidere al time for y our current tim e and location . This is useful f or knowing t he right ascension o f celesti al object s that are located on the local meridian at th at time. Filter Limits – W hen an ali gnment is co mplete, the NexS tar auto matically kno ws which cele stia l objects are above the horizon.[...]

10 Goto Alt-Az - Allows y ou to enter a specif ic altitude a nd azi muth positi on and slew to it. To store a se t of coordi nates (R. A./Dec ) permane ntly into the Ne xStar data base, sa ve it as a User Defin ed Object as desc ribed a bove . U U t t i i l l i i t t y y F F e e a a t t u u r r e e s s Scrolling through the MENU options w ill also [...]

11 ALT - AZ EQ NO RTH EQ SOUT H OF F MO D E SI DEREAL SOLAR LUNA R RA TE TRA CKI NG VI EW T I M E- SI TE SI DEREA L TI M E ALT M AX I N LI ST A L T M IN IN L IS T FI LT E R LI M I T S SET UP T I ME/ SI T E ANT I - BACKLASH SLEW L I M I T S DI RECT I ON B UT T O NS L I GHT C ON T ROL SELEC T MODEL U T IL IT IE S RS- 232 GOT O SK Y OBJ SAVE SKY O BJ [...]

12 A PPEN DIX C – MA PS OF TIME ZO NES[...]

13[...]