Celestron CGEM 1100 User Manual download pdf (Page 24)

Tracking Rate In addition to being able to move the telescope with the hand control buttons, your telescope will

continually track a celestial object as it moves across the night sky. The tracking rate can be

changed depending on what type of object 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 is polar aligned, this can

be accomplished by moving the telescope in right ascension only.

Lunar

Used for tracking the moon when observing the lunar landscape.

Solar

Used for tracking the Sun when solar observing with the proper

filter.

View Time-Site - Displays the current time and longitude/latitude downloaded from the optional CN-16 GPS receiver. It

will also display other relevant time-site information like time zone, daylight saving and local sidereal time. Local sidereal

time (LST) is useful for knowing the right ascension of celestial objects that are located on the Meridian at that time.

View

Time-Site

will always display the last saved time and location entered while it is linking with the GPS. Once current

information has been received, it will update the displayed information. If GPS is switched off or not present, the hand

control will only display the last saved time and location.

User Defined Objects - Your telescope can store up to 400 different user defined objects in its memory. The objects can be

daytime land objects or an interesting celestial object that you discover that is not included in the

regular database. There are several ways to save an object to memory depending on what type of

object it is:

GoTo Object: To go to any of the user defined objects stored in the database, scroll 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 telescope will automatically retrieve and display the coordinates before slewing to

the object.

Save Sky Object: Your telescope stores celestial objects to its database by saving its right ascension and declination

in the sky. This way the same object can be found each time the telescope is aligned. Once a

desired object is centered in the eyepiece, simply scroll to the "

Save Sky 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.

Save Database (Db)

Object:

This feature allows you to create your own custom tour of database objects by allowing you to

record the current position of the telescope and save the name of the object by selecting it from

any one of the database catalogs. These objects then can be accessed by selecting

GoTo Sky

Object.

Enter R.A. - Dec: You can also store a specific set of coordinates for an object just by entering the R.A. and

declination for that object. Scroll to the "

Enter RA-DEC " command and press ENTER. The

display will then ask you to enter first the R.A. and then the declination of the desired object.

Save Land Object: The telescope can also be used as a spotting scope on terrestrial objects. Fixed land objects can be

stored by saving their altitude and azimuth relative to the location of the telescope at the time of

observing. Since these objects are relative to the location of the telescope, they are only valid for

that exact location. To save land objects, once again center the desired object in the eyepiece.

Scroll down to the "

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.

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Celestron CGEM 1100 User Manual Page 24

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