How to find NGC6840 from Altair

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

Follow the route from one recognizable star to the next until you reach NGC6840.

NGC6840 is 57° above the horizon toward the northwest.

Altair

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

From Altair, move about 1.5° toward the north until you reach HYG 97675.0.

From HYG 97675.0, move about 2° toward the northeast until you reach NGC6840. This is the target field.