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Shāhīn Shahr

32.858° N   51.553° E  ·  1591 M
89 /100
PEAK
A genuinely good night — 7 hours of clear, dark sky from 21:30.
BEST WINDOW 21:30–04:30 · ASTRO DARK 21:30–04:30 · MOON 0%
Transparency
1.00
Seeing
0.67
Cloud
0%
Moon
0%

Excellent tonight

Hour by hour, local to Shāhīn Shahr. 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
56
44
62
79
75
88
89
43
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
34%
49%
23%
5%
12%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
Seeing
0.19
0.15
0.15
0.32
0.35
0.50
0.54
0.67
0.67
Moon clear
down
down
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
21 Good · 56/100
Starting from
100
Cloud
−30
Transparency
−0
Seeing
−14
Moonlight
−0
Darkness
−0
Score
56
CLOUD 34% LOW 0% MID 34% HIGH 0% SUN -28.9° MOON -27.3° / 0% WIND 10 TEMP 31°
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
Transparency vs seeing

Transparency is how much light gets through the atmosphere. Seeing is how steady it is. They are independent, they often move in opposite directions, and which one matters depends entirely on what you are pointing at.

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 21:00 · OBSERVE 21:30–04:30 · 7H · MEAN 78

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

2123010305
TWILIGHT BEGINS 04:30
SET UP 23:00 · OBSERVE 23:30–05:30 · 6H · MEAN 65

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

2123010305
CLOUD BREAKS 23:30TWILIGHT BEGINS 05:30SEEING STAYS SOFT THROUGHOUT
SET UP 21:00 · OBSERVE 21:30–05:30 · 8H · MEAN 76

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

2123010305
TWILIGHT BEGINS 05:30
SET UP 21:00 · OBSERVE 21:30–05:30 · 8H · MEAN 68

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

2123010305
TWILIGHT BEGINS 05:30
SET UP 21:00 · OBSERVE 21:30–04:30 · 7H · MEAN 82

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

2123010305
TWILIGHT BEGINS 04:30
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The next week of nights

Tonight · 12 Aug
89
Excellent
MOON 0%
21:30–04:30
Tomorrow · 13 Aug
94
Excellent
MOON 2%
21:30–04:30
Friday · 14 Aug
99
Excellent
MOON 6%
20:30–04:30
Saturday · 15 Aug
100
Excellent
MOON 13%
03:30–04:30
Sunday · 16 Aug
89
Excellent
MOON 21%
21:30–22:30
Monday · 17 Aug
94
Excellent
MOON 30%
03:30–04:30
Tuesday · 18 Aug
100
Excellent
MOON 39%
03:30–04:30
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Nearby locations

About this forecast

Conditions for Shāhīn Shahr, Iran 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 →