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Gujangbagh

37.109° N   79.934° E  ·  1366 M
42 /100
PEAK
Marginal, but there is a 1 hour gap from 03:00.
BEST WINDOW 03:00–04:00 · ASTRO DARK 00:00–05:00 · MOON 0%
Transparency
1.00
Seeing
0.83
Cloud
63%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
00
01
02
03
04
05
06
7
9
13
42
8
4
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
Mid cloud
100%
99%
93%
48%
99%
100%
100%
High cloud
56%
16%
32%
30%
32%
8%
17%
Transparency
1.00
1.00
1.00
0.83
1.00
1.00
0.75
Seeing
0.83
0.81
0.79
0.80
0.80
0.80
0.63
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
00 Clouded out · 7/100
Starting from
100
Cloud
−93
Transparency
−0
Seeing
−0
Moonlight
−0
Darkness
−0
Score
7
CLOUD 100% LOW 0% MID 100% HIGH 56% SUN -36.9° MOON -35.8° / 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.
Tonight's limiting factor
When a clear gap is worth driving for

Ask how long the gap is relative to your setup time and your exposure length. A two-hour gap is a real session for a visual observer and close to worthless for someone doing four-minute subs on a target that needs three hours.

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 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 42

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

00020406
CLOUD BREAKS 03:00CLOUD RETURNS 04:00
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 40

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

00020406
CLOUD BREAKS 03:00CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 39

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

00020406
CLOUD BREAKS 03:00CLOUD RETURNS 04:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

00020406
CLOUD NEVER DROPS BELOW 63%
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 37

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

00020406
CLOUD BREAKS 03:00CLOUD RETURNS 04:00
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The next week of nights

Tonight · 12 Aug
42
Fair
MOON 0%
03:00–04:00
Tomorrow · 13 Aug
88
Excellent
MOON 2%
22:00–05:00
Friday · 14 Aug
21
Poor
MOON 6%
Saturday · 15 Aug
47
Fair
MOON 12%
00:00–01:00
Sunday · 16 Aug
100
Excellent
MOON 19%
00:00–01:00
Monday · 17 Aug
99
Excellent
MOON 28%
00:00–01:00
Tuesday · 18 Aug
98
Excellent
MOON 37%
00:00–01:00
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Nearby locations

About this forecast

Conditions for Gujangbagh, 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 →