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Zhigulëvsk

53.403° N   49.511° E  ·  95 M
13 /100
PEAK
Cloud will spoil it. Not a night for the telescope.
NO USABLE WINDOW · ASTRO DARK 00:00–03:00 · MOON 0%
Transparency
0.73
Seeing
0.94
Cloud
20%
Moon
0%

Clouded out tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
20
21
22
23
00
01
02
03
04
05
0
0
5
11
6
9
13
44
14
0
Low cloud
0%
0%
0%
0%
0%
2%
5%
20%
38%
7%
Mid cloud
30%
100%
100%
95%
98%
87%
82%
1%
1%
0%
High cloud
51%
56%
9%
10%
19%
55%
31%
0%
0%
14%
Transparency
0.69
0.73
0.67
0.48
0.10
0.10
0.10
0.19
0.18
0.18
Seeing
0.95
0.90
0.88
0.90
0.82
0.91
0.94
0.92
0.88
0.90
Moon clear
0%
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down
down
down
down
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down
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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
20 Clouded out · 0/100
Starting from
100
Cloud
−47
Transparency
−6
Seeing
−1
Moonlight
−0
Darkness
−46
Score
0
CLOUD 66% LOW 0% MID 30% HIGH 51% SUN 1.6° MOON 3.2° / 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 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 41

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

2022000204
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 04:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 50

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

2022000204
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 40

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

2022000204
HIGH CLOUD CLEARS 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.

2022000204
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 43

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

2022000204
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 04:00
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The next week of nights

Tonight · 12 Aug
13
Clouded out
MOON 0%
Tomorrow · 13 Aug
76
Excellent
MOON 2%
23:00–04:00
Friday · 14 Aug
63
Good
MOON 6%
23:00–02:00
Saturday · 15 Aug
6
Clouded out
MOON 13%
Sunday · 16 Aug
49
Fair
MOON 21%
Monday · 17 Aug
49
Fair
MOON 30%
Tuesday · 18 Aug
57
Good
MOON 39%
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About this forecast

Conditions for Zhigulëvsk, Russia 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 →