Astronomy Forecast: Twilight Calculator

Forecasts Calculator

This calculator shows astronomical twilight times for any date, independent of cloud cover or actual observing conditions.

Wed 2025-12-10

Period Time
Astronomical Twilight (Evening) 17:21 - 18:07
Deep Sky Darkness 18:07 - 06:25
Astronomical Twilight (Morning) 06:25 - 07:12
Period Duration
Astronomical Twilight (Evening) 0 hours 46 minutes
Deep Sky Darkness 12 hours 18 minutes
Total Imaging Time 13 hours 51 minutes

Thu 2025-12-11

Period Time
Astronomical Twilight (Evening) 17:20 - 18:07
Deep Sky Darkness 18:07 - 06:26
Astronomical Twilight (Morning) 06:26 - 07:13
Period Duration
Astronomical Twilight (Evening) 0 hours 47 minutes
Deep Sky Darkness 12 hours 19 minutes
Total Imaging Time 13 hours 53 minutes

Fri 2025-12-12

Period Time
Astronomical Twilight (Evening) 17:20 - 18:07
Deep Sky Darkness 18:07 - 06:27
Astronomical Twilight (Morning) 06:27 - 07:14
Period Duration
Astronomical Twilight (Evening) 0 hours 47 minutes
Deep Sky Darkness 12 hours 20 minutes
Total Imaging Time 13 hours 54 minutes

Sat 2025-12-13

Period Time
Astronomical Twilight (Evening) 17:20 - 18:07
Deep Sky Darkness 18:07 - 06:28
Astronomical Twilight (Morning) 06:28 - 07:15
Period Duration
Astronomical Twilight (Evening) 0 hours 47 minutes
Deep Sky Darkness 12 hours 21 minutes
Total Imaging Time 13 hours 55 minutes

Sun 2025-12-14

Period Time
Astronomical Twilight (Evening) 17:20 - 18:07
Deep Sky Darkness 18:07 - 06:29
Astronomical Twilight (Morning) 06:29 - 07:16
Period Duration
Astronomical Twilight (Evening) 0 hours 47 minutes
Deep Sky Darkness 12 hours 22 minutes
Total Imaging Time 13 hours 56 minutes

Mon 2025-12-15

Period Time
Astronomical Twilight (Evening) 17:21 - 18:08
Deep Sky Darkness 18:08 - 06:29
Astronomical Twilight (Morning) 06:29 - 07:16
Period Duration
Astronomical Twilight (Evening) 0 hours 47 minutes
Deep Sky Darkness 12 hours 21 minutes
Total Imaging Time 13 hours 55 minutes

Tue 2025-12-16

Period Time
Astronomical Twilight (Evening) 17:21 - 18:08
Deep Sky Darkness 18:08 - 06:30
Astronomical Twilight (Morning) 06:30 - 07:17
Period Duration
Astronomical Twilight (Evening) 0 hours 47 minutes
Deep Sky Darkness 12 hours 22 minutes
Total Imaging Time 13 hours 56 minutes