Term: declination (dec)

Declination is like latitude. It reports how far a star is from the celestial equator. The north celestial pole is as far as possible from the celestial equator; it has a declination of 90°. Further away from the pole means smaller declination--no matter which way you go. The bulls-eye pattern displays the decrease in dec as you move away from the pole. The SC002 maps out to dec=30°. The red circles below connect points that all have the same declination. (Of course, the red circles are examples of diurnal circles.)