Galactic core · next 30 nights

Milky Way windows at Iriomote-Ishigaki National Park

This tracks the Sagittarius galactic core only when the Sun is at least 18° below the horizon and the core is at least 10° high. It is geometry, not a weather promise.

Best night11 Oct1.7 h of core visibility in darkness

Highest core altitude25°near 19:40

Usable nights30 / 30Moonlight and cloud still decide image contrast.

Computed local geometry

Core hours after astronomical twilight

11 Oct1.7 h1% moon

12 Oct1.7 h5% moon

13 Oct1.7 h10% moon

14 Oct1.7 h16% moon

15 Oct1.7 h23% moon

16 Oct1.3 h32% moon

17 Oct1.3 h41% moon

18 Oct1.3 h50% moon

19 Oct1.3 h60% moon

20 Oct1.3 h69% moon

21 Oct1.0 h78% moon

22 Oct1.0 h86% moon

23 Oct1.0 h92% moon

24 Oct1.0 h97% moon

25 Oct1.0 h99% moon

26 Oct0.7 h100% moon

27 Oct0.7 h97% moon

28 Oct0.7 h92% moon

29 Oct0.7 h85% moon

30 Oct0.7 h76% moon

31 Oct0.3 h65% moon

1 Nov0.3 h54% moon

2 Nov0.3 h42% moon

3 Nov0.3 h31% moon

4 Nov0.7 h21% moon

5 Nov0.3 h13% moon

6 Nov0.3 h7% moon

7 Nov0.3 h3% moon

8 Nov0.3 h0% moon

9 Nov0.3 h0% moon

19:40–21:20

This is the widest geometric window in the next month. Check the live forecast before travelling, then favor the darkest moonless portion. Check live cloud and transparency →

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Same coordinates, different question

Moon

Moonless nights

Find the longest uninterrupted dark windows.

Core

Milky Way

See when the galactic core clears the horizon after dark.

−18°

Astronomical darkness

Track true darkness, including polar twilight.