How to find NGC5139 from HYG 66657.0

Identify the first reference star, then follow the numbered hops.

Follow the route from one recognizable star to the next until you reach NGC5139.

NGC5139 is 12° above the horizon toward the southeast.

HYG 66657.0

Center HYG 66657.0 in the finder or a low-power eyepiece before following the field stars.

From HYG 66657.0, move about 4.5° toward the northwest until you reach HYG 65630.0.

From HYG 65630.0, move about 1.9° toward the north until you reach NGC5139. This is the target field.