Locating objects in the sky often require estimating distances in degrees. There are several methods of making these measurements. One of the commonest is to hold the hand at a distance from your face. The little finger is about 1/2 degree; first three fingers are about 5 degrees; a closed fist is about 10; etc.

Here's a simpler way. Practice holding a metric ruler about 22 or 23 inches (57  cm) from your eyes. Each cm division is about 1 degree.  It's that simple.