Each row is one condition per hour, like a Clear Sky Chart — hover any cell for the exact numbers. Cloud is a consensus of several models. Transparency comes from aerosol/haze, seeing from the jet stream. A good window is dark enough, under your cloud limit, and not washed out by the moon; the four limits control it.
The cloud forecast laid over a map of your region, hour by hour — clear where the map shows through, deep blue where it’s socked in. Your site is at centre with distance rings. Use +/− (or Ctrl+scroll) to zoom, drag to pan; play or drag the slider to scrub time.
Every upcoming night’s observing window — the stretch that’s dark, under your cloud limit, and not washed out by the moon — with the conditions in that window and a 0–100 quality score. Same window the forecast up top reports; hover a window for the full astronomical-dark span.
| Night | Observing window | Moon | Cloud | Transp | Seeing | Quality |
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Clouded in or light-polluted where you are? Search a grid around you for a spot that's both clearer and darker during tonight's observing window — road-accessible, within driving range.
Search any deep-sky object to see how it fills your DWARF 3 field (2.92°×1.64°) and whether it’s up during tonight’s window.
The best targets for your location and tonight’s conditions that also frame well in your field — ranked by how high they climb, darkness and moon, and framing. Tap Mark shot on ones you’ve already captured and they drop out, so the next-best fresh targets surface.
Deep-sky catalog: OpenNGC (Mattia Verga), CC BY-SA 4.0. Apparent sizes are approximate.
Bright-ish comets over the coming months, computed from Minor Planet Center orbits for wherever this page is pointed. Comet brightness is notoriously fickle — treat every magnitude as ±2.
Meteor showers, conjunctions, oppositions and moon phases for the coming year — each judged for your location: where to look, how high, and whether the moon interferes. Tap Plan to aim the Targets tab at that night.
Times are local to the selected location. Conjunction separations are geocentric. Comet orbits: Minor Planet Center.