1. The position of a star as located through the combination of two coordinates, east-west (right ascension) and north-south of the celestial equator.
2. The celestial coordinate analogous to latitude, usually measured in degrees, minutes, and seconds of arc north (+) or south (-) of the celestial equator.
3. The angular distance between a celestial object; such as, a star, and the celestial equator.

The symbol for this term is the Greek letter δ or delta.