User Manual

19
Polaris
URSA
MINOR
URSA
MAJOR
DRACO
CEPHEUS
The Four Stars
Polaris
Rotate
40
’
60
’
Polaris
Not Aligned
40
’
60
’
Polaris
Aligned
Fig. 3b
Image on polar viewfinder will be inverted.
Fig. 3a
Polar Viewfinder Reticle (for Northern Hemisphere Only)
Precision Polar Alignment - The Drift Method
Using this method, azimuth and altitude are adjusted separately until the effects of star
drift are eliminated. This method is good for Northern and Southern Hemisphere users.
• Azimuth adjustment
Select a star on the celestial equator and meridian (i.e., Hour Angle = 0° and Dec. = 0°).
• If, over time, the star drifts S in the eyepiece then the southern end of the polar axis is pointing
East of the Celestial Pole.
•If the star drifts N then the southern end of the polar axis is pointing West of the Celestial Pole.
• Altitude adjustment
Select a star in the East (and/or in the West) low on the horizon and in the southern hemisphere of the
Dec. = 0º.
• If the star in the East drifts N the elevation is too low.
• If the star drifts S the elevation is too high.
For more information on Polar Alignment on the Southern Hemisphere, visit Astronomical Society of
South Australia website at www.assa.org.au/resources/equipment-reviews/polar-alignment/
Southern Hemisphere users will need a crosshair reticle eyepiece. Available at astronomy shops.
EXOS II MOUNT SET UP / POLAR ALIGNMENT PROCESS