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Pastavy

55.117° N   26.833° E  ·  140 M
76 /100
PEAK
A genuinely good night — 4 hours of clear, dark sky from 00:00.
BEST WINDOW 00:00–04:00 · ASTRO DARK 00:00–03:00 · MOON 0%
Transparency
0.68
Seeing
1.00
Cloud
0%
Moon
0%

Excellent tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
21
22
23
00
01
02
03
04
05
0
9
51
76
72
70
62
34
0
BEST WINDOW
Low cloud
13%
24%
7%
0%
0%
0%
0%
2%
44%
Mid cloud
61%
39%
0%
0%
0%
0%
0%
0%
0%
High cloud
12%
1%
1%
0%
0%
0%
2%
6%
0%
Transparency
0.79
0.68
0.54
0.43
0.32
0.26
0.25
0.24
0.24
Seeing
0.96
1.00
0.99
0.94
0.94
0.98
0.98
0.98
0.97
Moon clear
0%
down
down
down
down
down
down
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
21 Clouded out · 0/100
Starting from
100
Cloud
−63
Transparency
−3
Seeing
−0
Moonlight
−0
Darkness
−33
Score
0
CLOUD 71% LOW 13% MID 61% HIGH 12% SUN -1.5° MOON 0.5° / 0% WIND 2 TEMP 17°
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 23:00–04:00 · 5H · MEAN 64

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

2123010305
CLOUD BREAKS 23:00TWILIGHT BEGINS 04:00
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 81

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

2123010305
CLOUD BREAKS 23:00CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–04:00 · 5H · MEAN 62

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

2123010305
CLOUD BREAKS 23:00TWILIGHT BEGINS 04:00
SET UP 22:30 · OBSERVE 23:00–04:00 · 5H · MEAN 54

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

2123010305
CLOUD BREAKS 23:00TWILIGHT BEGINS 04:00
SET UP 22:30 · OBSERVE 23:00–04:00 · 5H · MEAN 69

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

2123010305
CLOUD BREAKS 23:00TWILIGHT BEGINS 04:00
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The next week of nights

Tonight · 12 Aug
76
Excellent
MOON 0%
00:00–04:00
Tomorrow · 13 Aug
41
Fair
MOON 2%
00:00–02:00
Friday · 14 Aug
70
Good
MOON 5%
00:00–04:00
Saturday · 15 Aug
69
Good
MOON 13%
03:00–04:00
Sunday · 16 Aug
51
Fair
MOON 21%
03:00–04:00
Monday · 17 Aug
55
Good
MOON 30%
03:00–04:00
Tuesday · 18 Aug
2
Clouded out
MOON 39%
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Nearby locations

About this forecast

Conditions for Pastavy, Belarus 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 →