Thursday 2026-09-17

Devils Tower National Monument

Crook County, WY

51 Workable. Moon down after 10:17pm, 84% cloud.

Astronomical darkness 8:47pm–5:03am (8.27h) · best window 10:17pm–5:03am

Milky Way core up to 12.2°, high enough to be worth it for 0h29m, highest around 8:47pm.

Why

Cloud	13	84% cloud, overcast
Moon	98	first quarter at 45%, sets 10:17pm, dark after that
Darkness	92	8h16m of astronomical darkness, 8:47pm–5:03am
Transparency	0	Dewpoint spread 1.4°C, fog or heavy haze likely
Targets	43	Milky Way core up to 12.2°, high enough to be worth it for 0h29m