Vixen Sphinx SXP User Manual
Page 57
γ
2
β
υ
τ
σ
χ
γ
3
υ
τ
σ
χ
Octantis
σ
χ
τ
υ
(Sigma)
(Chi)
(Tau)
(Upsilon)
Magnitude
5.5
5.2
5.6
5.7
γ
2
β
υ
τ
σ
χ
γ
3
Chapter 5 APPLICATION
The polar axis scope contains a reticle showing the relative positions of four stars near the southern celestial pole. The stars are Sigma, Tau,
Chi and Upsilon of Octans. Polar align the mount with these four stars but precession is not considered.
Match with the orientation of the four stars
Match with each other
Octantis four stars
Field of view of the
polar axis scope
1
6
7
2
3
4
5
Set up the telescope in a flat and hard ground where you can see Octans in the sky. Point the polar axis of the SXP mount in the direction
of south. Adjust the tripod legs so that the tripod is as level as possible.
Take off the declination cap and polar axis cap. These caps can be removed readily by twisting counter-clockwise.
Turn on the power switch of the mount and advance the initial settings until the telescope's
home position screen appears on the screen of the STAR BOOK TEN.
Refer to set up procedures 4 to 7 that are described for the use in the northern hemisphere.
While looking into the eyepiece of the polar axis scope, turn the
azimuth adjustment screws and the altitude adjustment screw
alternately so that the four stars of Octans comes into the field of
view of the polar axis scope. Readjust the brightness of the reticle
to be dimmer if necessary.
While looking into the eyepiece of the polar axis scope, rotate the
polar axis scope so that the four stars of Octans comes to the
position in the reticle as shown in the figure.
Match the form of the Octantis four stars on the reticle with
the four stars of Octans while looking through the polar axis
scope.
Note: The position of the celestial poles moves gradually each year due to precession. According to this, the pattern of Octans shifts every year.
57