Observation planner

Choose an observing site, a night, and up to six deep-sky, Solar System, or comet targets to see how they move across your local sky.

Observing site

Observing night

Use an IANA timezone such as Europe/Bratislava. Times are always shown in 24-hour format.

Targets

Select up to six targets in total. The comet list is matched to the selected site and night.

Ready to calculate.

Virtual sky

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Calculating the night sky…

Planning estimate: deep-sky targets use fixed J2000 positions; Solar System positions are calculated in the browser for the selected site; comet discovery comes from COBS and comet ephemerides from JPL Horizons.