How to find NGC6639 using Sagittarius

This guide uses bright stars first, then narrows the field for a telescope or binocular finder. Use Sagittarius as the main sky landmark.

Follow the route from one recognizable star to the next until you reach NGC6639.

NGC6639 is 30° above the horizon toward the southwest.

Begin with Sagittarius, then follow the reference stars toward NGC6639.

Sagittarius

Recognize the characteristic star pattern of Sagittarius before following the route.

Identify Nunki in or near Sagittarius; the chart shows its position relative to the guide.

From Nunki, move about 5.8° toward the northwest until you reach HYG 92016.0.

From HYG 92016.0, move about 6.8° toward the northwest until you reach HYG 90913.0.

From HYG 90913.0, move about 1.8° toward the north until you reach NGC6639. This is the target field.