Celestron 127SLT User Manual page 14

Time -

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. For time zone information, refer to the Time Zone map in the appendix of this manual.
Helpful
Hints
Date -

If the wrong information has been input into the hand control, the UNDO button will act as a backspace
allowing the user to re-enter information.

The next time that your NexStar is aligned, the hand control will automatically display the last location
(either a city or longitude/latitude) that was entered. Press ENTER to accept these parameters if they still
apply.
longitude/latitude.
3. Use the arrow buttons on the hand control to slew (move) the telescope towards any bright celestial object in
the sky. Align the object with the red dot of the finderscope and press ENTER.
4. If the finderscope has been properly aligned with the telescope tube, the alignment star should now be
visible inside the field of view of the eyepiece. The hand control will ask that you center the bright
alignment star in the center of the eyepiece and press the ALIGN button. This will accept the star as the first
alignment position. (There is no need to adjust the slewing rate of the motors after each alignment step. The
NexStar automatically selects the best slewing rate for aligning objects in both the finderscope and the
eyepiece).
5. For the second alignment object, choose a bright star or planet as far as possible from the first alignment
object. Once again use the arrow button to center the object in the finderscope and press ENTER. Then
once centered in the eyepiece press the ALIGN button.
Repeat the process for the third alignment star. When the telescope has been aligned to the final stars, the
6.
display will read "Match Confirmed".
you aligned to, or press ENTER to accept these three objects for alignment. You are now ready to find your
first object.
Remember the following alignment guidelines to make using Sky Align as simple and accurate as possible.

Be sure to level the tripod before you begin alignment. The time/site information along with a level
tripod will help the telescope better predict the available bright stars and planets that are above the horizon.

Remember to select alignment stars that are as far apart in the sky as possible. For best results make sure
that the third alignment star does not lie in a straight line between the first two stars. This may result in a
failed alignment.

Don't worry about confusing planets for stars when selecting alignment objects. SkyAlign works with the
four brightest planets (Venus, Jupiter, Saturn and Mars) as well as the Moon. In addition to the planets, the
hand control has over 80 bright alignment stars to choose from (down to 2.5 magnitude).

Rarely SkyAlign will not be able to determine what three alignment objects were centered. This sometime
happens when a bright planet or the Moon passes near one of the brighter stars. In situations like these it is
best to try to avoid aligning to either object if possible.

Be sure to center the objects with the same final movements as the direction of the GoTo Approach. For
example, if the scope normally finishes a GoTo with the front of the scope moving right and up, you should
center all three alignment objects in the eyepiece using the right and up arrow buttons (the up/down arrows
reverse at slew rates of 6 or lower). Approaching the star from this direction when looking through the
eyepiece will eliminate much of the backlash between the gears and assure the most accurate alignment
possible.
Enter the current time for your area. You can enter either the local time (i.e. 8:00), or you can enter
military time (i.e. 20:00).
Enter the month, day and year of your observing session. The display will read: mm/dd/yy.
Pressing the UNDO button will allow you to go back and select a new city location or
Press UNDO to display the names of the three bright objects
Tips for Using Sky Align
14