How to find NGC3640 using Leo

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

Follow the route from one recognizable star to the next until you reach NGC3640.

NGC3640 is 14° above the horizon toward the east.

Begin with Leo, then follow the reference stars toward NGC3640.

Leo

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

Identify Denebola in or near Leo; the chart shows its position relative to the guide.

From Denebola, move about 4.9° toward the southwest until you reach HYG 56553.0.

From HYG 56553.0, move about 6.1° toward the southwest until you reach HYG 55434.0.

From HYG 55434.0, move about 2.8° toward the south until you reach NGC3640. This is the target field.