Bedienungsanleitung Bresser 4701102 (Seite 19 von 40) (Englisch)

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All objects of the sky can thus be precisely defined by their celestial coordinates in right

ascension and declination.

Finding the celestial pole

To get a rough idea of where the points of the compass are at an observation site, you

should be aware of the directions where the sun rises (east) and sets (west) every day.

After it has become dark at your place of observation, turn north - you achieve this by

pointing with your left shoulder in the direction where the sun went down earlier. In order

to find the pole exactly, you should now locate the polar star - use the Big Dipper as the

leading star image for this purpose (fig. 31).

Alignment of the MCX to the celestial pole

Whiletheearthrotatesoncearounditsaxisinabout24hours,allastronomicalobjects

seemtowanderonarcsacrossthesky.Thisapparentmovement(see"siderealspeed"

onpage19)ishardlynoticeabletotheunarmedeye.Butwhenviewedthroughapowerful

telescope like the MCX, it does indeed appear very quickly. If the motor-driven tracking

was not activated, an object that was just visible in the middle of the telescope eyepiece

disappears completely from view within a few seconds.

For a comfortable tracking of astronomical objects you should align your MCX telescope

to the celestial pole.

1. Make sure that the telescopic sight is adjusted with respect to the ETX main tube (see

"TheLEDViewfinder"onpage10).

2. Determine the geographical latitude of your observation location from a road map

or an atlas. The determination of the geographical latitude to the nearest degree is

completely sufficient.

3.Loosenthelockingscrewforthescalestick(3,fig.29)andadjusttherequiredpole

height by adjusting the tilt plate. Then tighten the locking screw again.

4.BringtheMCXtelescopeintothestartingposition(Fig.29).

NOTE!

The following steps 5 and 6 are absolutely necessary to prevent the telescope from

moving against the mechanical stops during automatic initialization and to prevent

damage to the drive motors.

5.Releasetheaxisclampingofthehorizontalclamping(rightascensionclamping)(9,

fig. 2) and carefully turn the telescope mount manually counterclockwise until the

mechanical stop is reached.

6.Turnthetelescopemountbacktoitsstartingposition(Fig.29)andtightentheaxle

clamp by hand.

7. Release the clamp of the vertical axis (1, fig. 32a) on the right fork arm and move the

tube to the zero degree position (2, fig. 32b - Pitch circle scale on the left fork arm).

NOTE!

For a fast observation in parallactic mode the adjustment of the pole height and the

height axis by scale and pitch circle is completely sufficient. To achieve even more precise

positioningandtracking,werecommendoptimizingthestartposition(see"Optimized

startposition"onpage20)

8.Initializethehandheldcomputer.

9.Selectapredefinedobservationlocationorenterauser-definedlocation(see"Initializing

thecontroller"onpage24).

10.In the main menu "Settings", select the menu item "Tracking mode" and set "EQ

Telescope".

Fig. 31

Search map for the Polarstern.

(1 = Polar star; 2 = Cassiopeia; 3 = Big car; 4 =

Small car)

Release the clamping of the height axis.

Fig.Fig. 32a 32a

Zero position

Fig. 32b

Alignment and Orientation

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