How to find NGC2158 using Gemini

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

Follow the route from one recognizable star to the next until you reach NGC2158.

NGC2158 is 12° above the horizon toward the northeast.

Begin with Gemini, then follow the reference stars toward NGC2158.

Gemini

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

Identify Alhena in or near Gemini; the chart shows its position relative to the guide.

From Alhena, move about 4.3° toward the northwest until you reach HYG 30883.0.

From HYG 30883.0, move about 4° toward the northwest until you reach Propus.

From Propus, move about 2.3° toward the northwest until you reach NGC2158. This is the target field.