HARPHorizon-Aware Recommender and Planner

Select the deep-sky targets best placed for tonight's astrophotography session.

Horizon-aware

Uses your site's real free-horizon profile, not a flat 0-degree ideal.

Matches targets to your telescope + camera field of view, down to per-panel mosaic coordinates.

Phase, separation, and narrowband-awareness folded into a per-target verdict.

A 0-100 desirability score orders each night's candidates; one hopeless factor sinks a target.

Shares the .hrz horizon and exports ranked targets or mosaic panels straight into the sequencer.

Curated + Messier/NGC/IC catalogs on disk, your own targets file on top; CLI output built for scripts.