Astronomical Twilight Calculator
Astronomical dawn and astronomical dusk for your chosen location and date, when the sun is 12–18° below the horizon.
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Astronomical Twilight Calculator settings
Times are calculated, not measured, and are typically accurate to within about a minute. Actual sunrise/sunset can shift slightly with elevation and local horizon obstructions.
What is astronomical twilight?
What is astronomical twilight? Astronomical twilight is when the sun is between 12° and 18° below the horizon. Once astronomical dusk ends (full darkness), the sky is dark enough for most stargazing and astrophotography, weather and light pollution permitting.
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- Sunrise TimeWhat time the sun rises today.
- Sunset TimeWhat time the sun sets today.
- Golden Hour CalculatorGolden hour (magic hour) for photography and film.
- Blue Hour CalculatorBlue hour for twilight photography.
- Dawn CalculatorCivil, nautical and astronomical dawn times.
- Dusk CalculatorCivil, nautical and astronomical dusk times.