N.I.N.A. Meridian Flip Simulator

By Kumar Challa

Visualize how your sub-exposure duration, flip settings, and mount limits interact near the meridian.

Minutes after meridian when the flip *can* start.

Max minutes after meridian the software will attempt to flip.

Mount tracking past meridian limit.

Length of the individual sub-exposure (in seconds).

Optional: Stops tracking before Meridian (in minutes).

Angular Sky Visualization

Zenith is the Meridian (straight up). The Calculated Flip Start line shows when the flip will be initiated.
The angular scale is exaggerated for clarity.

Linear Timing Visualization

Click and drag the Last Sub box.

Flip Outcome Summary

All times are relative to the meridian