Custom Objects; Customer R.a. And Dec; Sync To Target; Alignment - iOptron CEM70 Instruction Manual

5.1.7. Custom Objects

This allows the storage of up to 73 user-defined comets, and /or up to 64 stars/DSOs.

5.1.8. Customer R.A. and DEC

Here you can go to a target by entering its R.A. and DEC coordinates.

5.2. Sync to Target

This operation will match the telescope's current coordinates to the Target Right Ascension and
Declination. It can be used to correct GOTO pointing error. After slewing to an object, press MENU - then
scroll to "Sync to Target" and press ENTER. Follow the screen to perform the sync. Using this function will
re-align the telescope to the selected object. Multiple syncs can be performed if needed. This operation is
useful to find a faint star or nebula near a bright star.
"Sync to Target" will work after "Select and Slew" is performed. You can change the slew rate to
make the centering procedure easier. Simply press a number (1 through 9) key to change the speed. The
default slew rate is 64x.
"Sync to Target" will improve the local GOTO accuracy near by the synced star, which is useful for
finding a faint object nearby.

5.3. Alignment

This function is used for aligning the telescope to the celestial pole and to create a sky model to
calibrate the mount's GOTONOVA
three stars. Choose different stars will result in different errors. For better results, planetarium software
and/or plate solving is recommended.
The hand controller provides a polar alignment via "Polar Iterate Align," which uses a set of 2
bright. This also provides a viable polar alignment approach for those who can't see the pole.
The system provides four alignment methods to calibrate the mount's GOTO function: "Solar
System Align", "One Star Alignment", "Two Star Alignment" and "Three Star Alignment". The "Two
Star Alignment" may be used to refine the polar alignment. The mount has to be at Zero Position before
performing any alignment.

5.3.1. Position of Polaris/SigmaOct

This function displays the position of the Pole Star. In the Northern Hemisphere the position of
Polaris is displayed, while in the Southern Hemisphere the position of Sigma Octantis is shown.

5.3.2. One Star Alignment

Press MENU => "Alignment" => "One Star Alignment." A list of alignment stars that are above the
horizon is computed based on your local time and location. With the mount in the Zero Position, use the▲
and ▼ buttons to select a star and press ENTER. Center the target in your eyepiece using the arrow keys.
Press ENTER when finished. If your mount is set up correctly and polar aligned, one star alignment should
be sufficient for good GoTo accuracy. Linear RA and DEC error will be displayed after one star alignment.

5.3.3. Two Star Alignment

Two Star Align can improve the accuracy of the mount's polar alignment. Press MENU =>
"Alignment" => "Two Star Alignment" A list of alignment stars that are above the horizon is computed
based on your local time and location. With the mount at the Zero Position, use the ▲ and ▼ buttons to
select the first alignment star and press ENTER. Center the target in your eyepiece using the arrow keys
® functionality. Please keep in mind that the sky can't be modeled by only
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