Orion ATLAS EQ-G User Manual download pdf (Page 14)

Three-Star Alignment

1. From the alignment screen, select “3-Star Align” using the

scroll buttons. Press ENTER to confirm your choice.

2. The hand controller will provide a list of stars available in

your current sky for you to choose as the first alignment

star. Choose a star you are familiar with using the scroll

buttons. Press ENTER to confirm your choice. The mount

will start slewing the telescope towards the chosen object.

When the telescope stops slewing, adjust its position using

the controller’s directional buttons until the chosen star is

centered on the crosshairs of the finderscope. Now look

in the eyepiece and adjust the position of the telescope

(again using the directional buttons) so the chosen star is

centered in the field of view of the eyepiece. Press ENTER

to confirm the star is centered .

Note: The slewing speed can be adjusted by pressing the

RATE button. Choose a desired rate between 0 (slowest) and

9 (fastest).

Note: The hand controller will make a “beep” sound once it

has finished slewing to an object. Do not try to adjust the tele-

scope before you hear the “beep” sound. The controller will

only respond to the ESC button while slewing (which stops the

slewing).

3. The controller will provide a list of stars that can be used as

the second alignment star. Choose a star using the scroll

buttons and press ENTER to confirm your choice. Repeat

the centering procedure for the second alignment star

using the directional buttons and press ENTER to confirm

alignment.

4. The controller will once again provide a list of stars that can

be used as the third alignment star. Choose a star using

the scroll buttons and press ENTER to confirm your choice.

Once again, repeat the centering procedure for the third

alignment star and press ENTER to confirm alignment.

5. Once the three alignment stars have been entered and

alignment is completed, the hand controller will display

“Alignment Successful.” Press ENTER to access the Main

Menu. Otherwise, “Alignment Failed” will be displayed, and

the alignment procedure must be performed again. To do

this, turn the mount’s power switch off, then on again.

Two-Star Alignment

Two-star alignment requires only two alignment stars but may

produce lesser pointing accuracy than the three-star align-

ment. The description below will lead you on a step-by-step

procedure on how to perform the two-star alignment.

1. From the alignment screen, select “2-Star Align” using the

scroll buttons. Press ENTER to confirm your choice.

2. The hand controller will provide a list of stars available in

your current sky for you to choose as the first alignment

star. Using the scroll buttons, choose a star you are familiar

with and press ENTER to confirm your choice. The mount

will start slewing the telescope towards the chosen star.

When the telescope stops slewing, adjust its position with

the controller’s directional buttons until the star is centered

on the crosshairs of the finderscope. Now look in the eye-

piece and adjust the position of the telescope (again using

the directional buttons) so the chosen star is centered in

the field of view of the eyepiece. Press ENTER to confirm

the star is centered.

3. The controller will provide a list of stars that can be used as

the second alignment star. Choose a star using the scroll

buttons and press ENTER to confirm your choice. Repeat

the centering procedure for the second alignment star and

press ENTER to confirm alignment.

4. Once the two alignment stars have been entered and

alignment is complete, the hand controller will display

“Alignment Successful.” Press ENTER to access the Main

Menu. Otherwise, “Alignment Failed” will be displayed, and

the alignment procedure must be performed again. To do

this, turn the mount’s power switch off, then on again.

One-Star Alignment

One-star alignment is the simplest and quickest alignment

method, as only one alignment star is required. Due to minimal

data input, however, a one-star alignment will not yield optimal

results unless polar alignment is very accurate, and any cone

error is minimized (see Appendix A). The description below will

lead you on a step-by-step procedure on how to perform the

one-star alignment.

1. From the alignment screen, select “1-Star Align” using the

scroll buttons. Press ENTER to confirm your choice.

2. The hand controller will provide a list of stars available in

your current sky for you to choose as the first alignment

star. Using the scroll buttons, choose a star you are familiar

with and press ENTER to confirm your choice. The mount

will start slewing the telescope towards the chosen star.

When the telescope stops slewing, adjust its position with

the controller’s directional buttons until the star is centered

on the crosshairs of the finderscope. Now look in the eye-

piece and adjust the position of the telescope (again using

the directional buttons) so the chosen star is centered in

the field of view of the eyepiece. Press ENTER to confirm

the star is centered.

3. Once the alignment star has been entered and alignment

is complete, the hand controller will display “Alignment

Successful”. Press ENTER to access the Main Menu.

Tips for Choosing Alignment Stars

If possible, use the following tips when choosing alignment

stars for best pointing accuracy.

One-star alignment: Choose a star close to the Celestial

Equator (Dec close to 0°).

Two-star alignment: Choose two stars on the same side of the

meridian, and at least 3 hours apart in right ascension and

3° apart in declination. If you suspect your polar alignment is

poor, choose two stars that are 20° to 60° apart in declination.

Three-star alignment: For the first two stars, follow the tip above

for two-star alignment. For the third alignment star, choose a

star on the other side of the meridian. The first and third align-

ment stars should have declination coordinates between +30°

and +70° or between -30° and -70°.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 26 27

Comments to this Manuals

No comments

Orion ATLAS EQ-G User Manual Page 14

Comments to this Manuals

Related products and manuals for Telescopes Orion ATLAS EQ-G