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Huocheng

44.053° N   80.872° E  ·  639 M
77 /100
PEAK
A genuinely good night — 5 hours of clear, dark sky from 23:00.
BEST WINDOW 23:00–04:00 · ASTRO DARK 23:00–04:00 · MOON 0%
Transparency
0.69
Seeing
1.00
Cloud
9%
Moon
0%

Excellent tonight

Hour by hour, local to Huocheng. 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
06
75
77
76
51
40
65
5
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
3%
3%
2%
1%
1%
1%
2%
0%
High cloud
17%
8%
13%
69%
95%
10%
48%
81%
Transparency
0.69
0.62
0.60
0.58
0.61
0.65
0.65
0.69
Seeing
0.89
0.91
0.97
0.99
1.00
0.98
0.98
0.95
Moon clear
down
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 Excellent · 75/100
Starting from
100
Cloud
−12
Transparency
−11
Seeing
−2
Moonlight
−0
Darkness
−0
Score
75
CLOUD 18% LOW 0% MID 3% HIGH 17% SUN -26.6° MOON -25.3° / 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.
Tonight's limiting factor
Why thin high cloud ruins long exposures

Cirrus you can barely see will halo your bright stars, lift your background and vary between frames. Visual observers shrug it off. Long exposures integrate it, so it accumulates.

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 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 62

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

23010305
CLOUD RETURNS 05:00
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 70

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

23010305
CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 64

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

23010305
CLOUD RETURNS 03:00
SET UP 22:30 · OBSERVE 23:00–02:00 · 3H · MEAN 64

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

23010305
CLOUD RETURNS 02:00
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 69

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

23010305
CLOUD RETURNS 03:00
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The next week of nights

Tonight · 12 Aug
77
Excellent
MOON 0%
23:00–04:00
Tomorrow · 13 Aug
87
Excellent
MOON 2%
22:00–04:00
Friday · 14 Aug
76
Excellent
MOON 6%
22:00–05:00
Saturday · 15 Aug
83
Excellent
MOON 12%
00:00–01:00
Sunday · 16 Aug
95
Excellent
MOON 19%
00:00–01:00
Monday · 17 Aug
11
Clouded out
MOON 28%
Tuesday · 18 Aug
68
Good
MOON 37%
00:00–01:00
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Nearby locations

About this forecast

Conditions for Huocheng, 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 →