The declination of a source on the sky (0..90).

Input Format:

A sexagesimal number between -90 and 90 degrees, inclusive.

Operators:

-a

The unary minus operator changes the sign of its operand.

Use with do-loops:

When an Declination variable is used as the dependent variable of a do-loop, the associated loop increment is specified as a Sexagesimal constant.

Context:

The declination at which the telescope points is 0 when pointing at the celestial equator and 90 when pointing at the north celestial pole.