Leisure Time LX20 - Manual (Page 20)

step c, above. Press ENTER when the number is
entered.
e. Check the time delay as described in step b. If there is
a delay, increase the compensation number. If there is
a slight jump when reversing direction, then the
number is too large.
When the compensation number is correct, the LX200
telescope will move almost instantly when reversing the
direction in Declination. This compensation feature also
works in conjunction with . popular CCD autoguiders,
allowing for more accurate autoguiding.
This number is stored in permanent memory and
should never need to be set again.
b. OBJECT LIBRARY Menu File
The OBJECT LIBRARY menu file is the other half of the
TELESCOPE/OBJECT LIBRARY mode. With it you can
become a tourist of the sky, or conduct research surveys of the
64,359 objects. The LX200 Object Library is accessible in the
most results-getting, user friendly system ever designed for
observers and astrophotographers.
The core library, essentially a "greatest hits of the sky,"
encompasses eight planets of our solar system from Mercury to
Pluto, 351 stars (doubles, variables, pole stars), the entire
Messier catalog of 110 objects, 7840 of the finest galaxies, diffuse
and planetary nebulae, and globular and open star clusters
The position epoch of these objects is for real time, updated each
time you turn on your LX200. Even the planet's positions have
their orbits calculated! This not only qualifies the LX200 as the
most accurate integrated object library available, it will never
require updated software for precession of the stars or planetary
orbital changes.
There are three primary ways to use the Object Library. You can
directly access the library by using the M, STAR, or CNGC keys
(see THE LX200 KEYPAD HAND CONTROLLER, page 14) and entering
a specific catalog number, the START FIND option can be used to
logically find objects in organized strips of the sky that can be
custom tailored to only show the objects you wish to see with a
selection of object types, size brightness, etc., or you can scan the
sky and have the Object Library tell you what is in the field of view
in the eyepiece by using the FIELD option. Below is a description
of the four OBJECT LIBRARY menu files and file options:
To access the OBJECT LIBRARY menu file, move the arrow to the
OBJECT LIBRARY display by pressing the PREV or NEXT key
while in the TELESCOPE/OBJECT LIBRARY mode and press the
ENTER key. Now you can access the four menu selections within
the OBJECT LIBRARY by moving the arrow to the desired menu
selection by using the PREV or NEXT keys and doing the
following steps.
1. OBJECT INFO: Press the ENTER key to read the type,
brightness, size, and quality. Press ENTER again to read the
coordinates. Press ENTER once more to determine how far
off the telescope is pointing from the entered object (this is
displayed in LCD bars, each bar is ten degrees, or if it is on
the object, no bars). This same information can also be
accessed at any time by pressing the ENTER key for any
object entered by the M, STAR, or CNGC keys. Press MODE
to exit to the main menu file.
2. START FIND: The START FIND option resources the CNGC
objects within the Object Library and begins a logical search
starting wherever the telescope is positioned when
activated. To cover the entire visible sky it will make 31 strip
divisions about 12° wide, moving from West to East, from the
North Pole to the South Pole, then South to North. Once it
has found all of the CNGC objects it will repeat its sequence
until new objects are visible.
Press the ENTER key and the hand control will display the
first object in its finding sequence. This first object is
selected by the LX200, based off of where the instrument is
pointing in the sky when you entered START FIND. To point
your LX200 to the object displayed, press the GO TO key
and it will slew to the object.
While in the START FIND option, you can either choose the
next object in line or skip it as you wish. In order to find the
next object in sequence, press the NEXT key, and the
display will show the new CNGC object. If you do not wish to
view this object, press NEXT again. If you wish to return to a
previously viewed object, press the PREV key until the
desired catalog number is displayed and press the GO TO
key. If you have set some limitations in the PARAMETERS
option, it will only find those objects within your chosen
confines.
If you find that the object is not well centered in the eyepiece
after executing a GO TO (due to poor leveling, improper time
input, or errors in site location), center the object; then press
and hold the ENTER key until the display reads
"Coordinates Matched." This feature in
essence
synchronizes the LX200 for an area of the sky, so that the
next object (if the leveling, time input, or site location
information is not corrected) will be better centered,
provided it is not too far away from the object that you
matched coordinates to.
To exit the START FIND menu selection (and cease its
operation) to the main menu, press MODE.
3. FIELD: Press theENTER key to identify objects in the
field of view of the telescope. The LX200 will display the
object centered in the eyepiece field, and how many other
NGC objects are in thefield at the same time (defined by
the RADIUS parameter setting) as shown in Display 28:
If you are centered on the object already, such as if you are
in the FIELD menu selection, or if you have already made a
GO TO command in one of the other methods for finding an
object, the above display will be blank.
To review any of the data of an object, continue to press
ENTER until the desired field appears. You can use these
commands at any time that you have an object entered in the
keypad, while directly entering in specific objects by pressing
the M, STAR, or CNGC keys, in the START FIND
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