Tracking Rate; View Time-Site; User Defined Objects - Celestron NEXSTAR 102GT Instruction Manual

TRACKING RATE

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 tracking in Alt-Az mode, the tele-
scope must make corrections in both altitude and azimuth.
Lunar Used for tracking the moon when observing the lunar
landscape.
Solar Used for tracking the Sun when solar observing using a proper
solar filter.

VIEW TIME-SITE

View Time-Site will display the last saved time and longitude/latitude entered in the Hand Control.

USER DEFINED OBJECTS

The NexStar can store up to 50 different user defined objects in its memory. The objects can be day-
time 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:
SAVE SKY OBJECT:
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 1-25 to identify the object. Press ENTER again to save this
object to the database.
SAVE DATABASE (DB) OBJECT:
base 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 Go To Sky Object.
SAVE LAND OBJECT:
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 1-25 to identify the object. Press ENTER again to save this object to the database.
ENTER R.A. - DEC:
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.
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In addition to being able to move the telescope with the Hand Control
buttons, the NexStar 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:
The NexStar stores celestial objects to its database by saving
This feature allows you to create your own custom tour of data-
The NexStar can also be used as a spotting scope on terrestrial
You can also store a specific set of coordinates for an object just
COMPUTERIZED TELESCOPE
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