GoodSeeing
Galactic core · next 30 nights

Milky Way windows at Santa Fe

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 night18 Sept1.7 h of core visibility in darkness
Highest core altitude21°near 20:40
Usable nights30 / 30Moonlight and cloud still decide image contrast.
Computed local geometry

Core hours after astronomical twilight

18 Sept1.7 h54% moon
19 Sept1.7 h63% moon
20 Sept1.7 h72% moon
21 Sept1.7 h80% moon
22 Sept1.7 h87% moon
23 Sept1.3 h93% moon
24 Sept1.3 h97% moon
25 Sept1.3 h100% moon
26 Sept1.3 h100% moon
27 Sept1.7 h97% moon
28 Sept1.3 h92% moon
29 Sept1.3 h85% moon
30 Sept1.3 h76% moon
1 Oct1.3 h66% moon
2 Oct1.3 h54% moon
3 Oct1.0 h42% moon
4 Oct1.0 h31% moon
5 Oct1.0 h21% moon
6 Oct1.0 h12% moon
7 Oct1.0 h6% moon
8 Oct0.7 h2% moon
9 Oct0.7 h0% moon
10 Oct0.7 h1% moon
11 Oct1.0 h3% moon
12 Oct1.0 h8% moon
13 Oct0.7 h13% moon
14 Oct0.7 h21% moon
15 Oct0.7 h29% moon
16 Oct0.7 h37% moon
17 Oct0.7 h47% moon
20:40–22:20

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 →

Keep planning

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.