Vixen Sphinx SXP - Manual (Page 55)

Chapter 5 APPLICATION
Eyepiece
Polaris
Precession
21h42m
December 20h
10
11
12
13
14
Match the date graduation circle with your local observing time by rotating the polar axis scope. The figure below shows 21h 42m on
December 20th. The time graduation circle has a scale in 10-mimute increments, but you may set it as fine as one minute.
While looking into the eyepiece of the polar axis scope, turn the azimuth adjustment knobs and the altitude adjustment knob alternately so
that Polaris comes to the position in the reticle as shown in the figure. Readjust the brightness of the reticle to be dimmer if necessary.
Unfastening one side of the azimuth adjustment knobs will allow fastening the knob on
the other side.
Tighten the azimuth adjustment knobs and altitude adjustment knob securely and complete the polar alignment.
Turn the altitude adjustment knob
Note: The position of the celestial poles moves gradually each year due to precession.
According to this, the position of Polaris shifts every year.
Azimuth Adjustment Knobs
Altitude Adjustment Knob
Azimuth Adjustment Knobs
Altitude Adjustment Knob
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