Celestron CGX Equatorial 800 HD Telescope - Manual (Page 2)

SELECTING AN OBJECT
Once the telescope is properly aligned, you can choose an object
from any of the catalogs in the NexStar+ hand control’s database.
The hand control has a key designated for each category of
objects in its database; Solar System objects, Stars and Deep
Sky objects.
• Solar System – The Solar System catalog will display all of the
planets (and Moon) in our Solar System that are currently visible
in the sky. To allow the Sun to be displayed as an option in the
database, see Allow Sun option in the Database Setup section of
the manual.
• Stars – The Stars catalog displays custom lists of all the
brightest stars, double (binary) stars, variable stars,
constellations and selected asterisms.
• Deep Sky – The Deep Sky catalog displays a list of all of the best
Galaxies, Nebulae and Clusters, as well as the complete Messier
and select NGC objects. There is also an alphabetical list of all
deep sky objects in order by their common name.
Use the SCROLL keys to scroll through the catalogs to find the
object you wish to view.
When scrolling through a long list of objects, holding down either
the UP or DOWN key will allow you to scroll through the catalog
at a rapid speed.
SLEWING TO AN OBJECT
Once the desired object idisplayed on the hand control screen,
you have two options:
• Press the OBJECT INFO Key. This will give you useful
information about the selected object such as magnitude,
constellation and extended information about the most
popular objects.
o Use the UP/DOWN arrow buttons to scroll through the
displayed object info
o Use the BACK button to return to the object database
• Press the ENTER Key. This will automatically slew the
telescope to the coordinates of the object displayed on
the hand control. While the telescope is slewing to the
object, the user can still access many of the hand control
functions (such as displaying information about the object).
NOTE: The Messier, NGC and SAO catalogs require the user
to enter a numeric designation. Once you have selected the
appropriate catalog button and selected the Messier, NGC or
SAO catalog, you will see a flashing cursor indicating you are
in numeric entry mode.
Enter the catalog number for the object you want to view.
Press ENTER to command the telescope to slew to the object,
or hold the OPTION button (the Celestron logo) and press
OBJECT INFO to see information about the object you selected.
Caution: Never slew the telescope when someone is
looking into the eyepiece. The telescope can move at
fast slew speeds and may hit an observer in the eye.
MOTOR SPEED BUTTON
The MOTOR SPEED button, similar to the Rate button on the
original NexStar hand control, allows you to instantly change the
speed rate of the motors from high speed slew rate to precise
guiding rate or anywhere in between. Each rate corresponds to
a number on the hand control key pad. The number 9 button is
the fastest rate (approximately 3.5° per second, depending on
the mount) and is used for slewing between objects and locating
alignment stars. The number 1 button on the hand control is the
slowest rate (half sidereal) and can be used for accurate center-
ing of objects in the eyepiece.
To change the speed of the motors:
•Press the MOTOR SPEED key on the hand control.
The LCD will display the current motor speed
•Press the number on the hand control that
corresponds to the desired speed
The hand control has a “double button” feature that allows you
to instantly speed up the motors without having to choose a
speed. To use this feature, simply press the arrow button that
corresponds to the direction that you want to move the telescope.
While holding that button down, press the opposite direction but-
ton. This will increase the speed to the maximum slew rate.
When using the hand control’s up and down direction buttons, the
slower slew rates (6 and lower) move the motors in the opposite
direction than the faster slew rates (7- 9). This is done so that an
object will move in the appropriate direction when looking into
the eyepiece (i.e. pressing the UP arrow button will move the star
upwards in the field of view of the eyepiece). However, if any of
the slower slew rates (rate 6 and below) are used to center an ob-
ject in the StarPointer, you may need to press the opposite direc-
tional button to make the telescope move in the correct direction.
2835 Columbia Street | Torrance, CA 90503
TEL (310) 328-9560 | FAX (310) 212-5835
www.celestron.com
Copyright 2011 Celestron | All Rights Reserved.
NEXSTAR+ HAND CONTROL