Astrophotography & visual astronomy

Is tonight
worth it?

SkyGrade distills a wide range of weather, astronomy and environmental data into a single, easy-to-understand score.

SkyGrade answers the key question of every observing night: is it worth setting up my equipment tonight?

GPS coordinates as latitude, longitude (decimal degrees) – e.g. 47.07, 15.44
Rates the night of this day – from evening after sunset until the following morning.
Estimated from your location by default – can be set manually if needed

Why SkyGrade?

Anyone can see data – SkyGrade interprets it

Where Meteoblue, Clear Outside & Co. show raw data, SkyGrade gives you a clear, personalised decision: deep-sky, planets or better get some sleep.

  • One score – one decision

    No more interpreting raw data. SkyGrade combines all relevant factors into a single value.

  • Three specialised ratings

    Deep-sky, planets and visual observation have different requirements – SkyGrade rates them separately.

  • Smart moon correction

    A full moon below the horizon doesn't interfere. SkyGrade combines moonlight and moon altitude into a physically more plausible, more realistic assessment.

  • Light pollution included

    The Bortle class of your location feeds directly into the rating – it is not just about the weather.

  • Optimal observation window

    SkyGrade calculates the best time between astronomical twilight and moonrise.

  • Fully transparent

    Every sub-rating is visible. You immediately understand why a night is rated good or bad.

All times in German time (currently CEST).