Sky-watcher DOB16 User Manual download pdf (Page 15)

Scan

AZ will beep once when it has

finished slewing to an object. Do not try to

adjust the telescope before you hear the beep.

Scan

AZ will only respond to the ESC

key while slewing.

To ensure the accuracy of the star

alignment, make sure to end the

movement with the UP or RIGHT

directional key when centering the

object in the eyepiece view.

Brightest Star Alignment

Once the directional division has been selected, the hand control will generate a list of the stars located

within this region that are brighter than 1.5 in magnitudes, starting from the brightest to the dimmest.

The stars and planets below 10 degrees, higher than 75 degrees in elevation or fainter than 1.4 in

magnitudes will be filtered out.

The name and magnitude of the alignment star will be displayed on the first line of the LCD. The

approximate position will be prompted on the second line. For example, if Arcturus is prompt as

alignment star, its magnitude is 0.0 and location is at 88.1 degree east and 24.1 degree above the

horizon. You will see the LCD display as shown in Fig.i.

Directional division Span range in azimuth

The northern sky 315 ° ~ 45 °

The northeast sky 0 ° ~ 90 °

The eastern sky 45 ° ~ 135 °

The southeast sky 90 ° ~ 180 °

The southern sky 135 ° ~ 225 °

The southwest sky 180 ° ~ 270 °

The western sky 225 ° ~ 315 °

The northwest sky 270 ° ~ 360 °

Find a visible single bright star that is far apart from any object in the sky. Point the telescope roughly

to the star.

In the alignment screen, select Brightest-Star Align using the scroll keys. Press ENTER to confirm. The

hand control will prompt "Select Region:" for you to select one of the eight directional divisions in

azimuth angle from the north, northeast, east, southeast to northwest etc. Select the region where the

chosen star is located and press ENTER.

Each division covers 90-degree span in azimuth. The table below explains the range of the eight

directional divisions.

This alignment method is the most suitable if you are unfamiliar with the night sky, or are unsure of the name

of the brighter stars.

1. Arct u rus 0.0

E 88.1 ° 24 . 1°

For the first alignment star, the mount will not slew to the star auto-

matically. Use the directional buttons to manually slew the telescope

to point to the object in the finder and then center it in the eyepiece.

You may change the slewing speed by pressing the RATE button,

and then choose a number between 0 (slowest) - 9 (fastest). You will

find that Rate 4 may be best suited for centering the object in the

finderscope and Rate 3 or less for centering in the eyepiece view.

Once the star has been centered in the eyepiece, if it is a planet the hand control will prompt you to rese-

lect a star from the list as the first alignment star. Otherwise the hand control will prompt a list of objects

for you to choose as the second alignment star. Select an object from the list. The hand control will com-

mand the mount to slew the telescope to point to the star. If you see multiple objects in the eyepiece

view, the chosen star should be the brightest among all. Center the star in the eyepiece again. If both

alignment stars are properly aligned, "Alignment Successful" will display on the LCD. Otherwise, the

warning "Alignment Failed" will show and the alignment will have to be done again. You may exit the

alignment procedure by pressing the ESC key anytime during the procedure.

Fig.i

The slewing speed can be

adjusted by pressing on the

RATE button. Then choose a

number between 0 (slowest) - 9

(fastest).

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 28 29

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Sky-watcher DOB16 User Manual Page 15

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