[TRACKING]
Presets: last sub ends
Drag to orbit, right-click and drag to pan, scroll to zoom. German equatorial mount at a mid-northern latitude; target transits the zenith. The scenario recomputes live from the settings above. The angular scale is exaggerated for clarity.
How NINA decides the last sub
NINA never cuts a sub-exposure short to make the flip. The decision happens between exposures: before each new sub, NINA checks whether it can finish before the flip deadline (Max. minutes after meridian). A sub that fits runs to completion, and a sub that does not fit is simply never started, so the flip starts right after the previous sub ends.