StarsOutAlert me on good nights
Should you go outside tonight?
Good night ahead
Mostly clear. Worth setting up.
Chengdu
6.5
out of 10
Peak 2h
7.900:00–02:00
Prime 21–01
6.621:00–01:00
Best this week
8.9Thu, Sep 3
Moon
Waning Gibbous
84% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:32–09:26
📍 W · 24°
Full moon: Sep 26
Sun ↓ 19:28·Dark from 20:28·5% clouds
🔭
Moon visible today
06:40 – 09:24 · 84% lit · great for telescope viewing
Next great night
Tuesday — 7.0
🌙 Good night ahead
Sky quality tonight
Best: 00:00–02:00This week’s nights
Asia/ShanghaiHow the score works
60% weight
Cloud cover
Layer-weighted across the best 2-hour window of the night. Low clouds block everything, thin high cirrus still lets bright stars through.
40% weight
Moon darkness
A new moon boosts the score. A full moon near midnight washes out all but the brightest stars. We ease the penalty after midnight when the moon is setting.