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Gusinoozyorsk

51.283° N   106.500° E  ·  548 M
78 /100
PEAK
A genuinely good night — 4 hours of clear, dark sky from 00:00.
BEST WINDOW 00:00–04:00 · ASTRO DARK 00:00–04:00 · MOON 0%
Transparency
0.44
Seeing
1.00
Cloud
0%
Moon
0%

Excellent tonight

Hour by hour, local to Gusinoozyorsk. 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
75
76
77
78
45
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
1%
Mid cloud
0%
0%
0%
0%
0%
1%
High cloud
0%
0%
0%
0%
0%
0%
Transparency
0.39
0.41
0.43
0.44
0.42
0.42
Seeing
0.99
1.00
1.00
1.00
1.00
1.00
Moon clear
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 Excellent · 75/100
Starting from
100
Cloud
−0
Transparency
−24
Seeing
−0
Moonlight
−0
Darkness
−0
Score
75
CLOUD 0% LOW 0% MID 0% HIGH 0% SUN -22.5° MOON -21.2° / 0% WIND 2 TEMP 16°
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 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 77

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

000204
TWILIGHT BEGINS 04:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 88

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

000204
TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 66

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

000204
TWILIGHT BEGINS 05:00
SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 66

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

000204
TWILIGHT BEGINS 04:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 72

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

000204
TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
78
Excellent
MOON 0%
00:00–04:00
Tomorrow · 13 Aug
48
Fair
MOON 1%
00:00–03:00
Friday · 14 Aug
57
Good
MOON 5%
23:00–01:00
Saturday · 15 Aug
46
Fair
MOON 10%
02:00–03:00
Sunday · 16 Aug
16
Poor
MOON 19%
Monday · 17 Aug
41
Fair
MOON 28%
02:00–03:00
Tuesday · 18 Aug
23
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Gusinoozyorsk, 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 →