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Koh Kong

11.615° N   102.984° E  ·  5 M
44 /100
PEAK
Marginal, but there is a 1 hour gap from 23:00.
BEST WINDOW 23:00–00:00 · ASTRO DARK 23:00–05:00 · MOON 0%
Transparency
0.39
Seeing
0.77
Cloud
63%
Moon
0%

Fair tonight

Hour by hour, local to Koh Kong. 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
44
28
15
22
24
31
19
0
BEST WINDOW
Low cloud
2%
7%
41%
15%
16%
9%
14%
24%
Mid cloud
2%
2%
21%
21%
12%
15%
17%
20%
High cloud
65%
88%
81%
77%
73%
52%
55%
1%
Transparency
0.39
0.10
0.10
0.10
0.10
0.10
0.15
0.15
Seeing
0.77
0.73
0.52
0.38
0.40
0.42
0.37
0.39
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 Fair · 44/100
Starting from
100
Cloud
−38
Transparency
−15
Seeing
−3
Moonlight
−0
Darkness
−0
Score
44
CLOUD 66% LOW 2% MID 2% HIGH 65% SUN -57.8° MOON -56.4° / 0% WIND 4 TEMP 28°
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 22:30 · OBSERVE 23:00–00:00 · 1H · MEAN 43

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

23010305
CLOUD RETURNS 00:00
SET UP 22:30 · OBSERVE 23:00–00:00 · 1H · MEAN 47

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

23010305
CLOUD RETURNS 00:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–00:00 · 1H · MEAN 35

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

23010305
CLOUD RETURNS 00:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 22:30 · OBSERVE 23:00–00:00 · 1H · MEAN 41

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

23010305
CLOUD RETURNS 00:00
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The next week of nights

Tonight · 12 Aug
44
Fair
MOON 0%
23:00–00:00
Tomorrow · 13 Aug
15
Poor
MOON 1%
Friday · 14 Aug
3
Clouded out
MOON 5%
Saturday · 15 Aug
9
Clouded out
MOON 10%
Sunday · 16 Aug
1
Clouded out
MOON 19%
Monday · 17 Aug
3
Clouded out
MOON 28%
Tuesday · 18 Aug
0
Clouded out
MOON 37%
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About this forecast

Conditions for Koh Kong, Cambodia 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 →