Horizon-aware
Uses your site's real free-horizon profile, not a flat 0-degree ideal.
HARPHorizon-Aware Recommender and Planner
Select the deep-sky targets best placed for tonight's astrophotography session.
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Rig-informed
Matches targets to your telescope + camera field of view, down to per-panel mosaic coordinates.
Moon-savvy
Phase, separation, and narrowband-awareness folded into a per-target verdict.
Light-pollution aware
Declare a Bortle class or an SQM reading and ranking switches from magnitude to contrast — surface brightness against your sky. Faint sprawling galaxies sink in city glow; compact and narrowband targets hold. Neutral until you ask for it.
Ranked, not just listed
A 0-100 desirability score orders each night's candidates; one hopeless factor sinks a target.
N.I.N.A.-integrated
Shares the .hrz horizon and exports ranked targets or mosaic panels straight into the sequencer.
Solar System aware
The Moon and the eight planets are ranked alongside deep-sky objects (offline, on by default); positions recomputed live because they move.
Classified and filterable
Every target carries its nature — nebula, galaxy, cluster, planet, moon, sun — surfaced in the output and filterable with --filter.
Offline and scriptable
Messier/NGC/IC + the Sharpless H II regions (with measured sizes) on disk, your own targets file on top; CLI output built for scripts.