Astronomy Forecast: Twilight Calculator

This calculator shows locally calculated astronomical twilight, Sun, and Moon data for any date, independent of cloud cover or actual observing conditions.

Thu 2026-09-10

☀︎ ↓19:56 ↑06:45 ☾ ↑05:38 ↓19:40 New moon: 1%
Period Time
Astronomical Twilight (Evening) 21:24 - 22:18
Deep Sky Darkness 22:18 - 04:25
Astronomical Twilight (Morning) 04:25 - 05:18
Period Duration
Astronomical Twilight (Evening) 0 hours 54 minutes
Deep Sky Darkness 6 hours 7 minutes
Total Imaging Time 7 hours 54 minutes

Fri 2026-09-11

☀︎ ↓19:54 ↑06:48 ☾ ↑07:08 ↓19:45 New moon: 0%
Period Time
Astronomical Twilight (Evening) 21:21 - 22:14
Deep Sky Darkness 22:14 - 04:28
Astronomical Twilight (Morning) 04:28 - 05:21
Period Duration
Astronomical Twilight (Evening) 0 hours 53 minutes
Deep Sky Darkness 6 hours 14 minutes
Total Imaging Time 8 hours 0 minutes

Sat 2026-09-12

☀︎ ↓19:51 ↑06:50 ☾ ↑08:36 ↓19:49 New moon: 2%
Period Time
Astronomical Twilight (Evening) 21:18 - 22:11
Deep Sky Darkness 22:11 - 04:31
Astronomical Twilight (Morning) 04:31 - 05:23
Period Duration
Astronomical Twilight (Evening) 0 hours 53 minutes
Deep Sky Darkness 6 hours 20 minutes
Total Imaging Time 8 hours 5 minutes

Sun 2026-09-13

☀︎ ↓19:48 ↑06:52 ☾ ↑10:02 ↓19:54 New moon: 6%
Period Time
Astronomical Twilight (Evening) 21:14 - 22:07
Deep Sky Darkness 22:07 - 04:34
Astronomical Twilight (Morning) 04:34 - 05:26
Period Duration
Astronomical Twilight (Evening) 0 hours 53 minutes
Deep Sky Darkness 6 hours 27 minutes
Total Imaging Time 8 hours 12 minutes

Mon 2026-09-14

☀︎ ↓19:45 ↑06:54 ☾ ↑11:28 ↓20:00 No moon: 12%
Period Time
Astronomical Twilight (Evening) 21:11 - 22:03
Deep Sky Darkness 22:03 - 04:36
Astronomical Twilight (Morning) 04:36 - 05:28
Period Duration
Astronomical Twilight (Evening) 0 hours 52 minutes
Deep Sky Darkness 6 hours 33 minutes
Total Imaging Time 8 hours 17 minutes

Tue 2026-09-15

☀︎ ↓19:43 ↑06:56 ☾ ↑12:54 ↓20:09 No moon: 19%
Period Time
Astronomical Twilight (Evening) 21:08 - 22:00
Deep Sky Darkness 22:00 - 04:39
Astronomical Twilight (Morning) 04:39 - 05:30
Period Duration
Astronomical Twilight (Evening) 0 hours 52 minutes
Deep Sky Darkness 6 hours 39 minutes
Total Imaging Time 8 hours 22 minutes

Wed 2026-09-16

☀︎ ↓19:40 ↑06:58 ☾ ↑14:18 ↓20:24 No moon: 28%
Period Time
Astronomical Twilight (Evening) 21:05 - 21:56
Deep Sky Darkness 21:56 - 04:42
Astronomical Twilight (Morning) 04:42 - 05:33
Period Duration
Astronomical Twilight (Evening) 0 hours 51 minutes
Deep Sky Darkness 6 hours 46 minutes
Total Imaging Time 8 hours 28 minutes