Celestron CGEM DX, Instruction Manual

8

Two Star Align

 uses the entered time/location information and 

allows the user to select which two alignment stars the telescope 

will automatically slew to . 

One Star Align

 uses the same time/

location information but only uses one star for alignment . 

Solar 

System Align

 will display a list of visible daytime objects (planets 

and the moon) available to align the telescope . 

Quick-Align

will ask you to input all the same information as you would for 

the Auto Align procedure . However, instead of slewing to the 

alignment stars for centering and alignment, the telescope 

bypasses this step and simply models the sky based on the 

information given . Finally, Last Alignment restores your last saved 

star alignment and switch position . 

Last Alignment

 also serves 

as a good safeguard in case the telescope should lose power . 

S

tartup

 p

roCEDurE

Before any of the described alignments are performed, the 

telescope mount needs to be positioned so that the index 

marks are aligned on both the right ascension and declination 

axes . (see Fig 3-2) .
Once the index position has been set, the hand control will 

display the last entered date and time information stored in the 

hand control . 

1 . Press ENTER to begin the alignment process .
2 . The hand control will ask the user to set the mount to its 

index position . Move the telescope mount, either manually or 

with the hand control, so that the index marked in both R .A . 

and Dec are aligned (see Fig 3-2) . Press 

Enter

 to continue .

•  The hand control will then display the last entered local 

time, time zone and date .

•  Use the Up/Down keys (10) to view the current 

parameters .

•  Press ENTER to accept the current parameters.
•  Press UNDO to enter current date, time and location 

information into the hand control . The following 

information will be displayed:

Location

— The hand control will display a list of cities to 

choose from . Choose the city from the database that is closest 

to your current observing site . The city you choose will be 

remembered in the hand controls memory so that it will be 

automatically displayed the next time an alignment is done . 

Alternatively, if you know the exact longitude and latitude of 

your observing site, it can be entered directly into the hand 

control and remembered for future use as well . To choose a 

location city:

•  Use the Up and Down scroll keys to choose between 

City Database

 and 

Custom Site

 . 

City Database

 will 

allow you to select the closest city to your observing 

site from a list of either international or U .S . location . 

Custom Site

 allows you to enter the exact longitude 

and latitude of your observing site . Select 

City 

Database

 and press ENTER .

•   The hand control will allow you to choose from either 

U .S . or international locations . For a listing of U .S . 

locations by state and then by city, press ENTER while 

United States

 is displayed . For international 

locations, use the Up or Down scroll key to select 

International

 and press ENTER . 

•  Use the Up and Down Scroll buttons to choose your 

current state (or country if International locations was 

selected) from the alphabetical listing and press ENTER .

•  Use the Up and Down Scroll buttons to choose the 

closest city to your location from the displayed list and 

press ENTER .

Time

— Enter the current local time for your area . You can 

enter either the local time (i .e . 

08:00

), or you can enter 

military time (i .e . 

20:00

 ) . 

•  Select PM or AM. If military time was entered, the hand 

control will bypass this step .

•  Choose between Standard time or Daylight Savings 

time . Use the Up and Down scroll buttons (10) to toggle 

between options .

•  Select the time zone that you are observing from. 

Again, use the Up and Down buttons (10) to scroll 

through the choices . Refer to Time Zone map in 

Appendix for more information .

Date

— Enter the month, day and year of your  

observing session .

Updating Your Location 

— Since you may not need to 

update your observing location as often as the date and 

time, it is not displayed each time you update the date 

and time. To update your city, press UNDO at any time 

when updating your date and time. Continue to press 

UNDO to change the state, country or to add longitude/

latitude coordinates.

Select one of the alignment methods as described below . 

Note: If incorrect information is entered into the hand 

control, the UNDO button acts like a back space button 

allowing the user to re-enter the correct data.

t

Wo

 S

tar

 a

liGn

Two-Star Align allows the user to select two stars on which to 

align the telescope . To align your telescope using the Two-Star 

Align method:
1 . Select Two-Star Align from the alignment choices given . 

Based on the date and time information entered, the hand 

control will automatically select and display a bright star that 

is above the horizon . 
•  Press ENTER to select this star as your first  

alignment star .

•  If for some reason the chosen star is not visible (perhaps 

behind a tree or building) press UNDO to have the hand 

control automatically select the next brightest star . 

•  Or you can use the Up/Down keys to browse the entire 

Named Star list and select any one of over two hundred 

alignment stars .

F

igure

 3-2 - D

eClination

 i

nDeX

 M

arks

anD

 r

ight

 a

sCension

 (ra) i

nDeX

 M

arks

Index  

Marks