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Sunch’ŏn

39.432° N   125.933° E  ·  72 M
50 /100
PEAK
Marginal, but there is a 3 hours gap from 02:00.
BEST WINDOW 02:00–05:00 · ASTRO DARK 02:00–05:00 · MOON 0%
Transparency
0.52
Seeing
0.96
Cloud
63%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
02
03
04
05
06
50
35
35
9
0
BEST WINDOW
Low cloud
2%
1%
1%
1%
0%
Mid cloud
2%
0%
0%
0%
0%
High cloud
63%
98%
100%
99%
98%
Transparency
0.52
0.48
0.46
0.42
0.38
Seeing
0.91
0.92
0.96
0.96
1.00
Moon clear
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
02 Fair · 50/100
Starting from
100
Cloud
−36
Transparency
−12
Seeing
−1
Moonlight
−0
Darkness
−0
Score
50
CLOUD 63% LOW 2% MID 2% HIGH 63% SUN -32.6° MOON -32.1° / 0% WIND 3 TEMP 21°
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 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 48

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

020406
CLOUD RETURNS 03:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 42

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

020406
TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 40

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

020406
CLOUD RETURNS 03:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

020406
CLOUD NEVER DROPS BELOW 63%
SET UP 01:30 · OBSERVE 02:00–03:00 · 1H · MEAN 45

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

020406
CLOUD RETURNS 03:00
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The next week of nights

Tonight · 12 Aug
50
Fair
MOON 0%
02:00–05:00
Tomorrow · 13 Aug
6
Clouded out
MOON 1%
Friday · 14 Aug
40
Fair
MOON 5%
22:00–23:00
Saturday · 15 Aug
4
Clouded out
MOON 8%
Sunday · 16 Aug
49
Fair
MOON 19%
03:00–04:00
Monday · 17 Aug
58
Good
MOON 28%
21:00–22:00
Tuesday · 18 Aug
27
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Sunch’ŏn, North Korea 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 →