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Achinsk

56.268° N   90.501° E  ·  196 M
35 /100
PEAK
Marginal, but there is a 2 hours gap from 00:00.
BEST WINDOW 00:00–02:00 · ASTRO DARK 01:00–02:00 · MOON 0%
Transparency
0.54
Seeing
0.93
Cloud
45%
Moon
0%

Fair tonight

Hour by hour, local to Achinsk. 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
24
35
35
33
25
17
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
0%
0%
0%
1%
74%
High cloud
99%
98%
98%
99%
96%
45%
76%
Transparency
0.54
0.51
0.45
0.38
0.34
0.31
0.26
Seeing
0.84
0.85
0.89
0.92
0.90
0.93
0.97
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
23 Poor · 24/100
Starting from
100
Cloud
−55
Transparency
−8
Seeing
−1
Moonlight
−0
Darkness
−11
Score
24
CLOUD 99% LOW 0% MID 0% HIGH 99% SUN -14.2° MOON -13.0° / 0% WIND 4 TEMP 18°
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.

NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CLOUD NEVER DROPS BELOW 45%
SET UP 23:30 · OBSERVE 00:00–03:00 · 3H · MEAN 36

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

23010305
ASTRONOMICAL DARK FROM 00:00TWILIGHT BEGINS 03:00MOONLIGHT IGNORED FOR THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CLOUD NEVER DROPS BELOW 45%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CLOUD NEVER DROPS BELOW 45%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

23010305
CLOUD NEVER DROPS BELOW 45%
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The next week of nights

Tonight · 12 Aug
35
Fair
MOON 0%
00:00–02:00
Tomorrow · 13 Aug
39
Fair
MOON 1%
00:00–01:00
Friday · 14 Aug
67
Good
MOON 5%
00:00–03:00
Saturday · 15 Aug
65
Good
MOON 10%
01:00–02:00
Sunday · 16 Aug
57
Good
MOON 19%
01:00–02:00
Monday · 17 Aug
11
Clouded out
MOON 28%
Tuesday · 18 Aug
30
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Achinsk, 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 →