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Xinyuan

43.426° N   83.250° E  ·  953 M
73 /100
PEAK
Worth setting up — 4 hours of workable sky from 00:00.
BEST WINDOW 00:00–04:00 · ASTRO DARK 23:00–04:00 · MOON 0%
Transparency
0.61
Seeing
1.00
Cloud
2%
Moon
0%

Good tonight

Hour by hour, local to Xinyuan. 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
10
45
37
62
73
62
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
Mid cloud
96%
45%
58%
24%
12%
1%
1%
High cloud
0%
1%
0%
2%
1%
1%
1%
Transparency
0.38
0.41
0.45
0.50
0.55
0.61
0.64
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
1.00
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 Clouded out · 10/100
Starting from
100
Cloud
−86
Transparency
−3
Seeing
−0
Moonlight
−0
Darkness
−0
Score
10
CLOUD 96% LOW 0% MID 96% HIGH 0% SUN -27.9° MOON -26.6° / 0% WIND 1 TEMP 21°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.
Tonight's limiting factor
Conditions for planets and the Moon

Seeing is everything. Darkness and moonlight barely matter, and a hazy, humid night that ruins deep-sky work is often the steadiest night of the year for planetary detail.

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 00:00–05:00 · 5H · MEAN 54

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

23010305
CLOUD BREAKS 00:00TWILIGHT BEGINS 05:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 67

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 53

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 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 53

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

23010305
CLOUD BREAKS 02:00TWILIGHT BEGINS 05:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 64

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

23010305
CLOUD BREAKS 02:00TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
73
Good
MOON 0%
00:00–04:00
Tomorrow · 13 Aug
72
Good
MOON 2%
22:00–04:00
Friday · 14 Aug
81
Excellent
MOON 6%
22:00–04:00
Saturday · 15 Aug
84
Excellent
MOON 12%
00:00–01:00
Sunday · 16 Aug
88
Excellent
MOON 19%
00:00–01:00
Monday · 17 Aug
34
Poor
MOON 28%
Tuesday · 18 Aug
39
Fair
MOON 37%
00:00–01:00
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Nearby locations

About this forecast

Conditions for Xinyuan, 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 →