iOptron GoToNova 8401 - Manual (Page 29)

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29
North South
Zenith
Nadir
Celestial
North Pole
Celestial
South Pole
East
West
Observer’s horizon
Celestial Equator
M, midpoint
star hour circle
median of
location
δ, declination
t, hour angle
axis of ro
tati
on
FIG.D2