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Sandaohezi

44.326° N   85.620° E  ·  528 M
83 /100
PEAK
A genuinely good night — 4 hours of clear, dark sky from 00:00.
BEST WINDOW 00:00–04:00 · ASTRO DARK 23:00–04:00 · MOON 0%
Transparency
0.80
Seeing
0.91
Cloud
4%
Moon
0%

Excellent tonight

Hour by hour, local to Sandaohezi. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
23
00
01
02
03
04
05
32
66
70
82
83
43
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
Mid cloud
67%
22%
17%
2%
5%
16%
6%
High cloud
0%
0%
2%
2%
0%
2%
1%
Transparency
0.63
0.62
0.62
0.66
0.74
0.80
0.82
Seeing
0.86
0.86
0.91
0.91
0.86
0.87
0.87
Moon clear
down
down
down
down
down
down
down
Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Why this hour scored what it did
23 Poor · 32/100
Starting from
100
Cloud
−60
Transparency
−6
Seeing
−1
Moonlight
−0
Darkness
−0
Score
32
CLOUD 67% LOW 0% MID 67% HIGH 0% SUN -27.8° MOON -26.5° / 0% WIND 3 TEMP 24°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 76

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

23010305
CLOUD BREAKS 00:00TWILIGHT BEGINS 04:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 76

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

23010305
CLOUD BREAKS 00:00TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 67

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

23010305
CLOUD BREAKS 00:00TWILIGHT BEGINS 05:00
SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 67

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

23010305
CLOUD BREAKS 00:00TWILIGHT BEGINS 04:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 69

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

23010305
CLOUD BREAKS 00:00TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
83
Excellent
MOON 0%
00:00–04:00
Tomorrow · 13 Aug
80
Excellent
MOON 2%
22:00–04:00
Friday · 14 Aug
86
Excellent
MOON 6%
22:00–04:00
Saturday · 15 Aug
92
Excellent
MOON 12%
00:00–01:00
Sunday · 16 Aug
95
Excellent
MOON 19%
00:00–01:00
Monday · 17 Aug
93
Excellent
MOON 28%
00:00–01:00
Tuesday · 18 Aug
48
Fair
MOON 37%
00:00–01:00
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Nearby locations

About this forecast

Conditions for Sandaohezi, China are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →