StarsOutAlert me on good nights
Should you go outside tonight?
Might be worth a look
Partial clearing expected. Keep an eye out.
Sapporo
5.0
out of 10
Peak 2h
7.001:00–03:00
Prime 21–01
4.921:00–01:00
Best this week
6.2Thu, Jun 4
Moon
Waning Gibbous
98% lit
Very bright — stick to planets and the moon itself
🔭 Moon up: 20:23–04:41
Sun ↓ 19:06·Dark from 20:06·76% clouds
🔭
Moon visible today
03:57 – 07:26 · 98% lit · great for telescope viewing
Sky quality tonight
Best: 01:00–03:00This week’s nights
Asia/TokyoHow 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.